Add a test

4 files changed, 123 insertions, 103 deletions

diff --git a/tests/coq/misc/NoNestedBorrows.v b/tests/coq/misc/NoNestedBorrows.v
index a83347a7..de31fec7 100644
--- a/tests/coq/misc/NoNestedBorrows.v
+++ b/tests/coq/misc/NoNestedBorrows.v
@@ -243,14 +243,19 @@ Check (choose_test )%return.
 Definition test_char : result char :=
   Ok (char_of_byte Coq.Init.Byte.x61).
 
+(** [no_nested_borrows::panic_mut_borrow]:
+    Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:36 *)
+Definition panic_mut_borrow (i : u32) : result u32 :=
+  Fail_ Failure.
+
 (** [no_nested_borrows::Tree]
-    Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:16 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:16 *)
 Inductive Tree_t (T : Type) :=
 | Tree_Leaf : T -> Tree_t T
 | Tree_Node : T -> NodeElem_t T -> Tree_t T -> Tree_t T
 
 (** [no_nested_borrows::NodeElem]
-    Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:20 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 227:0-227:20 *)
 with NodeElem_t (T : Type) :=
 | NodeElem_Cons : Tree_t T -> NodeElem_t T -> NodeElem_t T
 | NodeElem_Nil : NodeElem_t T
@@ -263,7 +268,7 @@ Arguments NodeElem_Cons { _ }.
 Arguments NodeElem_Nil { _ }.
 
 (** [no_nested_borrows::list_length]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 257:0-257:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 262:0-262:48 *)
 Fixpoint list_length (T : Type) (l : List_t T) : result u32 :=
   match l with
   | List_Cons _ l1 => i <- list_length T l1; u32_add 1%u32 i
@@ -272,7 +277,7 @@ Fixpoint list_length (T : Type) (l : List_t T) : result u32 :=
 .
 
 (** [no_nested_borrows::list_nth_shared]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 265:0-265:62 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 270:0-270:62 *)
 Fixpoint list_nth_shared (T : Type) (l : List_t T) (i : u32) : result T :=
   match l with
   | List_Cons x tl =>
@@ -284,7 +289,7 @@ Fixpoint list_nth_shared (T : Type) (l : List_t T) (i : u32) : result T :=
 .
 
 (** [no_nested_borrows::list_nth_mut]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 281:0-281:67 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 286:0-286:67 *)
 Fixpoint list_nth_mut
   (T : Type) (l : List_t T) (i : u32) :
   result (T * (T -> result (List_t T)))
@@ -305,7 +310,7 @@ Fixpoint list_nth_mut
 .
 
 (** [no_nested_borrows::list_rev_aux]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 297:0-297:63 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 302:0-302:63 *)
 Fixpoint list_rev_aux
   (T : Type) (li : List_t T) (lo : List_t T) : result (List_t T) :=
   match li with
@@ -315,14 +320,14 @@ Fixpoint list_rev_aux
 .
 
 (** [no_nested_borrows::list_rev]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 311:0-311:42 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:42 *)
 Definition list_rev (T : Type) (l : List_t T) : result (List_t T) :=
   let (li, _) := core_mem_replace (List_t T) l List_Nil in
   list_rev_aux T li List_Nil
 .
 
 (** [no_nested_borrows::test_list_functions]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:28 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 321:0-321:28 *)
 Definition test_list_functions : result unit :=
   let l := List_Cons 2%i32 List_Nil in
   let l1 := List_Cons 1%i32 l in
@@ -361,7 +366,7 @@ Definition test_list_functions : result unit :=
 Check (test_list_functions )%return.
 
 (** [no_nested_borrows::id_mut_pair1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 332:0-332:89 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 337:0-337:89 *)
 Definition id_mut_pair1
   (T1 T2 : Type) (x : T1) (y : T2) :
   result ((T1 * T2) * ((T1 * T2) -> result (T1 * T2)))
@@ -370,7 +375,7 @@ Definition id_mut_pair1
 .
 
 (** [no_nested_borrows::id_mut_pair2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 336:0-336:88 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 341:0-341:88 *)
 Definition id_mut_pair2
   (T1 T2 : Type) (p : (T1 * T2)) :
   result ((T1 * T2) * ((T1 * T2) -> result (T1 * T2)))
@@ -379,7 +384,7 @@ Definition id_mut_pair2
 .
 
 (** [no_nested_borrows::id_mut_pair3]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 340:0-340:93 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 345:0-345:93 *)
 Definition id_mut_pair3
   (T1 T2 : Type) (x : T1) (y : T2) :
   result ((T1 * T2) * (T1 -> result T1) * (T2 -> result T2))
@@ -388,7 +393,7 @@ Definition id_mut_pair3
 .
 
 (** [no_nested_borrows::id_mut_pair4]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 344:0-344:92 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 349:0-349:92 *)
 Definition id_mut_pair4
   (T1 T2 : Type) (p : (T1 * T2)) :
   result ((T1 * T2) * (T1 -> result T1) * (T2 -> result T2))
@@ -397,7 +402,7 @@ Definition id_mut_pair4
 .
 
 (** [no_nested_borrows::StructWithTuple]
-    Source: 'tests/src/no_nested_borrows.rs', lines 351:0-351:34 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 356:0-356:34 *)
 Record StructWithTuple_t (T1 T2 : Type) :=
 mkStructWithTuple_t {
   structWithTuple_p : (T1 * T2);
@@ -408,25 +413,25 @@ Arguments mkStructWithTuple_t { _ _ }.
 Arguments structWithTuple_p { _ _ }.
 
 (** [no_nested_borrows::new_tuple1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 355:0-355:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 360:0-360:48 *)
 Definition new_tuple1 : result (StructWithTuple_t u32 u32) :=
   Ok {| structWithTuple_p := (1%u32, 2%u32) |}
 .
 
 (** [no_nested_borrows::new_tuple2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 359:0-359:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 364:0-364:48 *)
 Definition new_tuple2 : result (StructWithTuple_t i16 i16) :=
   Ok {| structWithTuple_p := (1%i16, 2%i16) |}
 .
 
 (** [no_nested_borrows::new_tuple3]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 363:0-363:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:48 *)
 Definition new_tuple3 : result (StructWithTuple_t u64 i64) :=
   Ok {| structWithTuple_p := (1%u64, 2%i64) |}
 .
 
 (** [no_nested_borrows::StructWithPair]
-    Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:33 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 373:0-373:33 *)
 Record StructWithPair_t (T1 T2 : Type) :=
 mkStructWithPair_t {
   structWithPair_p : Pair_t T1 T2;
@@ -437,13 +442,13 @@ Arguments mkStructWithPair_t { _ _ }.
 Arguments structWithPair_p { _ _ }.
 
 (** [no_nested_borrows::new_pair1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 372:0-372:46 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 377:0-377:46 *)
 Definition new_pair1 : result (StructWithPair_t u32 u32) :=
   Ok {| structWithPair_p := {| pair_x := 1%u32; pair_y := 2%u32 |} |}
 .
 
 (** [no_nested_borrows::test_constants]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 380:0-380:23 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 385:0-385:23 *)
 Definition test_constants : result unit :=
   swt <- new_tuple1;
   let (i, _) := swt.(structWithTuple_p) in
@@ -470,7 +475,7 @@ Definition test_constants : result unit :=
 Check (test_constants )%return.
 
 (** [no_nested_borrows::test_weird_borrows1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 389:0-389:28 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 394:0-394:28 *)
 Definition test_weird_borrows1 : result unit :=
   Ok tt.
 
@@ -478,78 +483,78 @@ Definition test_weird_borrows1 : result unit :=
 Check (test_weird_borrows1 )%return.
 
 (** [no_nested_borrows::test_mem_replace]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 399:0-399:37 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 404:0-404:37 *)
 Definition test_mem_replace (px : u32) : result u32 :=
   let (y, _) := core_mem_replace u32 px 1%u32 in
   if negb (y s= 0%u32) then Fail_ Failure else Ok 2%u32
 .
 
 (** [no_nested_borrows::test_shared_borrow_bool1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 406:0-406:47 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 411:0-411:47 *)
 Definition test_shared_borrow_bool1 (b : bool) : result u32 :=
   if b then Ok 0%u32 else Ok 1%u32
 .
 
 (** [no_nested_borrows::test_shared_borrow_bool2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 419:0-419:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 424:0-424:40 *)
 Definition test_shared_borrow_bool2 : result u32 :=
   Ok 0%u32.
 
 (** [no_nested_borrows::test_shared_borrow_enum1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 434:0-434:52 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 439:0-439:52 *)
 Definition test_shared_borrow_enum1 (l : List_t u32) : result u32 :=
   match l with | List_Cons _ _ => Ok 1%u32 | List_Nil => Ok 0%u32 end
 .
 
 (** [no_nested_borrows::test_shared_borrow_enum2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 446:0-446:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 451:0-451:40 *)
 Definition test_shared_borrow_enum2 : result u32 :=
   Ok 0%u32.
 
 (** [no_nested_borrows::incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 457:0-457:24 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 462:0-462:24 *)
 Definition incr (x : u32) : result u32 :=
   u32_add x 1%u32.
 
 (** [no_nested_borrows::call_incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 461:0-461:35 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:35 *)
 Definition call_incr (x : u32) : result u32 :=
   incr x.
 
 (** [no_nested_borrows::read_then_incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:41 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 471:0-471:41 *)
 Definition read_then_incr (x : u32) : result (u32 * u32) :=
   x1 <- u32_add x 1%u32; Ok (x, x1)
 .
 
 (** [no_nested_borrows::Tuple]
-    Source: 'tests/src/no_nested_borrows.rs', lines 472:0-472:24 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 477:0-477:24 *)
 Definition Tuple_t (T1 T2 : Type) : Type := T1 * T2.
 
 (** [no_nested_borrows::use_tuple_struct]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 474:0-474:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 479:0-479:48 *)
 Definition use_tuple_struct (x : Tuple_t u32 u32) : result (Tuple_t u32 u32) :=
   let (_, i) := x in Ok (1%u32, i)
 .
 
 (** [no_nested_borrows::create_tuple_struct]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 478:0-478:61 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:61 *)
 Definition create_tuple_struct
   (x : u32) (y : u64) : result (Tuple_t u32 u64) :=
   Ok (x, y)
 .
 
 (** [no_nested_borrows::IdType]
-    Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:20 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 488:0-488:20 *)
 Definition IdType_t (T : Type) : Type := T.
 
 (** [no_nested_borrows::use_id_type]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 485:0-485:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 490:0-490:40 *)
 Definition use_id_type (T : Type) (x : IdType_t T) : result T :=
   Ok x.
 
 (** [no_nested_borrows::create_id_type]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 489:0-489:43 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 494:0-494:43 *)
 Definition create_id_type (T : Type) (x : T) : result (IdType_t T) :=
   Ok x.
 
diff --git a/tests/fstar/misc/NoNestedBorrows.fst b/tests/fstar/misc/NoNestedBorrows.fst
index 340dd293..5fd775cb 100644
--- a/tests/fstar/misc/NoNestedBorrows.fst
+++ b/tests/fstar/misc/NoNestedBorrows.fst
@@ -211,20 +211,25 @@ let _ = assert_norm (choose_test = Ok ())
 let test_char : result char =
   Ok 'a'
 
+(** [no_nested_borrows::panic_mut_borrow]:
+    Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:36 *)
+let panic_mut_borrow (i : u32) : result u32 =
+  Fail Failure
+
 (** [no_nested_borrows::Tree]
-    Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:16 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:16 *)
 type tree_t (t : Type0) =
 | Tree_Leaf : t -> tree_t t
 | Tree_Node : t -> nodeElem_t t -> tree_t t -> tree_t t
 
 (** [no_nested_borrows::NodeElem]
-    Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:20 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 227:0-227:20 *)
 and nodeElem_t (t : Type0) =
 | NodeElem_Cons : tree_t t -> nodeElem_t t -> nodeElem_t t
 | NodeElem_Nil : nodeElem_t t
 
 (** [no_nested_borrows::list_length]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 257:0-257:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 262:0-262:48 *)
 let rec list_length (t : Type0) (l : list_t t) : result u32 =
   begin match l with
   | List_Cons _ l1 -> let* i = list_length t l1 in u32_add 1 i
@@ -232,7 +237,7 @@ let rec list_length (t : Type0) (l : list_t t) : result u32 =
   end
 
 (** [no_nested_borrows::list_nth_shared]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 265:0-265:62 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 270:0-270:62 *)
 let rec list_nth_shared (t : Type0) (l : list_t t) (i : u32) : result t =
   begin match l with
   | List_Cons x tl ->
@@ -241,7 +246,7 @@ let rec list_nth_shared (t : Type0) (l : list_t t) (i : u32) : result t =
   end
 
 (** [no_nested_borrows::list_nth_mut]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 281:0-281:67 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 286:0-286:67 *)
 let rec list_nth_mut
   (t : Type0) (l : list_t t) (i : u32) :
   result (t & (t -> result (list_t t)))
@@ -260,7 +265,7 @@ let rec list_nth_mut
   end
 
 (** [no_nested_borrows::list_rev_aux]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 297:0-297:63 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 302:0-302:63 *)
 let rec list_rev_aux
   (t : Type0) (li : list_t t) (lo : list_t t) : result (list_t t) =
   begin match li with
@@ -269,13 +274,13 @@ let rec list_rev_aux
   end
 
 (** [no_nested_borrows::list_rev]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 311:0-311:42 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:42 *)
 let list_rev (t : Type0) (l : list_t t) : result (list_t t) =
   let (li, _) = core_mem_replace (list_t t) l List_Nil in
   list_rev_aux t li List_Nil
 
 (** [no_nested_borrows::test_list_functions]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:28 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 321:0-321:28 *)
 let test_list_functions : result unit =
   let l = List_Cons 2 List_Nil in
   let l1 = List_Cons 1 l in
@@ -312,7 +317,7 @@ let test_list_functions : result unit =
 let _ = assert_norm (test_list_functions = Ok ())
 
 (** [no_nested_borrows::id_mut_pair1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 332:0-332:89 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 337:0-337:89 *)
 let id_mut_pair1
   (t1 t2 : Type0) (x : t1) (y : t2) :
   result ((t1 & t2) & ((t1 & t2) -> result (t1 & t2)))
@@ -320,7 +325,7 @@ let id_mut_pair1
   Ok ((x, y), Ok)
 
 (** [no_nested_borrows::id_mut_pair2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 336:0-336:88 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 341:0-341:88 *)
 let id_mut_pair2
   (t1 t2 : Type0) (p : (t1 & t2)) :
   result ((t1 & t2) & ((t1 & t2) -> result (t1 & t2)))
@@ -328,7 +333,7 @@ let id_mut_pair2
   let (x, x1) = p in Ok ((x, x1), Ok)
 
 (** [no_nested_borrows::id_mut_pair3]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 340:0-340:93 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 345:0-345:93 *)
 let id_mut_pair3
   (t1 t2 : Type0) (x : t1) (y : t2) :
   result ((t1 & t2) & (t1 -> result t1) & (t2 -> result t2))
@@ -336,7 +341,7 @@ let id_mut_pair3
   Ok ((x, y), Ok, Ok)
 
 (** [no_nested_borrows::id_mut_pair4]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 344:0-344:92 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 349:0-349:92 *)
 let id_mut_pair4
   (t1 t2 : Type0) (p : (t1 & t2)) :
   result ((t1 & t2) & (t1 -> result t1) & (t2 -> result t2))
@@ -344,35 +349,35 @@ let id_mut_pair4
   let (x, x1) = p in Ok ((x, x1), Ok, Ok)
 
 (** [no_nested_borrows::StructWithTuple]
-    Source: 'tests/src/no_nested_borrows.rs', lines 351:0-351:34 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 356:0-356:34 *)
 type structWithTuple_t (t1 t2 : Type0) = { p : (t1 & t2); }
 
 (** [no_nested_borrows::new_tuple1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 355:0-355:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 360:0-360:48 *)
 let new_tuple1 : result (structWithTuple_t u32 u32) =
   Ok { p = (1, 2) }
 
 (** [no_nested_borrows::new_tuple2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 359:0-359:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 364:0-364:48 *)
 let new_tuple2 : result (structWithTuple_t i16 i16) =
   Ok { p = (1, 2) }
 
 (** [no_nested_borrows::new_tuple3]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 363:0-363:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:48 *)
 let new_tuple3 : result (structWithTuple_t u64 i64) =
   Ok { p = (1, 2) }
 
 (** [no_nested_borrows::StructWithPair]
-    Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:33 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 373:0-373:33 *)
 type structWithPair_t (t1 t2 : Type0) = { p : pair_t t1 t2; }
 
 (** [no_nested_borrows::new_pair1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 372:0-372:46 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 377:0-377:46 *)
 let new_pair1 : result (structWithPair_t u32 u32) =
   Ok { p = { x = 1; y = 2 } }
 
 (** [no_nested_borrows::test_constants]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 380:0-380:23 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 385:0-385:23 *)
 let test_constants : result unit =
   let* swt = new_tuple1 in
   let (i, _) = swt.p in
@@ -396,7 +401,7 @@ let test_constants : result unit =
 let _ = assert_norm (test_constants = Ok ())
 
 (** [no_nested_borrows::test_weird_borrows1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 389:0-389:28 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 394:0-394:28 *)
 let test_weird_borrows1 : result unit =
   Ok ()
 
@@ -404,71 +409,71 @@ let test_weird_borrows1 : result unit =
 let _ = assert_norm (test_weird_borrows1 = Ok ())
 
 (** [no_nested_borrows::test_mem_replace]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 399:0-399:37 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 404:0-404:37 *)
 let test_mem_replace (px : u32) : result u32 =
   let (y, _) = core_mem_replace u32 px 1 in
   if not (y = 0) then Fail Failure else Ok 2
 
 (** [no_nested_borrows::test_shared_borrow_bool1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 406:0-406:47 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 411:0-411:47 *)
 let test_shared_borrow_bool1 (b : bool) : result u32 =
   if b then Ok 0 else Ok 1
 
 (** [no_nested_borrows::test_shared_borrow_bool2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 419:0-419:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 424:0-424:40 *)
 let test_shared_borrow_bool2 : result u32 =
   Ok 0
 
 (** [no_nested_borrows::test_shared_borrow_enum1]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 434:0-434:52 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 439:0-439:52 *)
 let test_shared_borrow_enum1 (l : list_t u32) : result u32 =
   begin match l with | List_Cons _ _ -> Ok 1 | List_Nil -> Ok 0 end
 
 (** [no_nested_borrows::test_shared_borrow_enum2]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 446:0-446:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 451:0-451:40 *)
 let test_shared_borrow_enum2 : result u32 =
   Ok 0
 
 (** [no_nested_borrows::incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 457:0-457:24 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 462:0-462:24 *)
 let incr (x : u32) : result u32 =
   u32_add x 1
 
 (** [no_nested_borrows::call_incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 461:0-461:35 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:35 *)
 let call_incr (x : u32) : result u32 =
   incr x
 
 (** [no_nested_borrows::read_then_incr]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:41 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 471:0-471:41 *)
 let read_then_incr (x : u32) : result (u32 & u32) =
   let* x1 = u32_add x 1 in Ok (x, x1)
 
 (** [no_nested_borrows::Tuple]
-    Source: 'tests/src/no_nested_borrows.rs', lines 472:0-472:24 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 477:0-477:24 *)
 type tuple_t (t1 t2 : Type0) = t1 * t2
 
 (** [no_nested_borrows::use_tuple_struct]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 474:0-474:48 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 479:0-479:48 *)
 let use_tuple_struct (x : tuple_t u32 u32) : result (tuple_t u32 u32) =
   let (_, i) = x in Ok (1, i)
 
 (** [no_nested_borrows::create_tuple_struct]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 478:0-478:61 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:61 *)
 let create_tuple_struct (x : u32) (y : u64) : result (tuple_t u32 u64) =
   Ok (x, y)
 
 (** [no_nested_borrows::IdType]
-    Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:20 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 488:0-488:20 *)
 type idType_t (t : Type0) = t
 
 (** [no_nested_borrows::use_id_type]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 485:0-485:40 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 490:0-490:40 *)
 let use_id_type (t : Type0) (x : idType_t t) : result t =
   Ok x
 
 (** [no_nested_borrows::create_id_type]:
-    Source: 'tests/src/no_nested_borrows.rs', lines 489:0-489:43 *)
+    Source: 'tests/src/no_nested_borrows.rs', lines 494:0-494:43 *)
 let create_id_type (t : Type0) (x : t) : result (idType_t t) =
   Ok x
 
diff --git a/tests/lean/NoNestedBorrows.lean b/tests/lean/NoNestedBorrows.lean
index 5ae22055..0f11092d 100644
--- a/tests/lean/NoNestedBorrows.lean
+++ b/tests/lean/NoNestedBorrows.lean
@@ -258,16 +258,21 @@ def choose_test : Result Unit :=
 def test_char : Result Char :=
   Result.ok 'a'
 
+/- [no_nested_borrows::panic_mut_borrow]:
+   Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:36 -/
+def panic_mut_borrow (i : U32) : Result U32 :=
+  Result.fail .panic
+
 mutual
 
 /- [no_nested_borrows::Tree]
-   Source: 'tests/src/no_nested_borrows.rs', lines 217:0-217:16 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:16 -/
 inductive Tree (T : Type) :=
 | Leaf : T → Tree T
 | Node : T → NodeElem T → Tree T → Tree T
 
 /- [no_nested_borrows::NodeElem]
-   Source: 'tests/src/no_nested_borrows.rs', lines 222:0-222:20 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 227:0-227:20 -/
 inductive NodeElem (T : Type) :=
 | Cons : Tree T → NodeElem T → NodeElem T
 | Nil : NodeElem T
@@ -275,7 +280,7 @@ inductive NodeElem (T : Type) :=
 end
 
 /- [no_nested_borrows::list_length]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 257:0-257:48 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 262:0-262:48 -/
 divergent def list_length (T : Type) (l : List T) : Result U32 :=
   match l with
   | List.Cons _ l1 => do
@@ -284,7 +289,7 @@ divergent def list_length (T : Type) (l : List T) : Result U32 :=
   | List.Nil => Result.ok 0#u32
 
 /- [no_nested_borrows::list_nth_shared]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 265:0-265:62 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 270:0-270:62 -/
 divergent def list_nth_shared (T : Type) (l : List T) (i : U32) : Result T :=
   match l with
   | List.Cons x tl =>
@@ -296,7 +301,7 @@ divergent def list_nth_shared (T : Type) (l : List T) (i : U32) : Result T :=
   | List.Nil => Result.fail .panic
 
 /- [no_nested_borrows::list_nth_mut]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 281:0-281:67 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 286:0-286:67 -/
 divergent def list_nth_mut
   (T : Type) (l : List T) (i : U32) : Result (T × (T → Result (List T))) :=
   match l with
@@ -318,7 +323,7 @@ divergent def list_nth_mut
   | List.Nil => Result.fail .panic
 
 /- [no_nested_borrows::list_rev_aux]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 297:0-297:63 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 302:0-302:63 -/
 divergent def list_rev_aux
   (T : Type) (li : List T) (lo : List T) : Result (List T) :=
   match li with
@@ -326,13 +331,13 @@ divergent def list_rev_aux
   | List.Nil => Result.ok lo
 
 /- [no_nested_borrows::list_rev]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 311:0-311:42 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:42 -/
 def list_rev (T : Type) (l : List T) : Result (List T) :=
   let (li, _) := core.mem.replace (List T) l List.Nil
   list_rev_aux T li List.Nil
 
 /- [no_nested_borrows::test_list_functions]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 316:0-316:28 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 321:0-321:28 -/
 def test_list_functions : Result Unit :=
   do
   let l := List.Cons 2#i32 List.Nil
@@ -379,7 +384,7 @@ def test_list_functions : Result Unit :=
 #assert (test_list_functions == Result.ok ())
 
 /- [no_nested_borrows::id_mut_pair1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 332:0-332:89 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 337:0-337:89 -/
 def id_mut_pair1
   (T1 T2 : Type) (x : T1) (y : T2) :
   Result ((T1 × T2) × ((T1 × T2) → Result (T1 × T2)))
@@ -387,7 +392,7 @@ def id_mut_pair1
   Result.ok ((x, y), Result.ok)
 
 /- [no_nested_borrows::id_mut_pair2]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 336:0-336:88 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 341:0-341:88 -/
 def id_mut_pair2
   (T1 T2 : Type) (p : (T1 × T2)) :
   Result ((T1 × T2) × ((T1 × T2) → Result (T1 × T2)))
@@ -396,7 +401,7 @@ def id_mut_pair2
   Result.ok ((t, t1), Result.ok)
 
 /- [no_nested_borrows::id_mut_pair3]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 340:0-340:93 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 345:0-345:93 -/
 def id_mut_pair3
   (T1 T2 : Type) (x : T1) (y : T2) :
   Result ((T1 × T2) × (T1 → Result T1) × (T2 → Result T2))
@@ -404,7 +409,7 @@ def id_mut_pair3
   Result.ok ((x, y), Result.ok, Result.ok)
 
 /- [no_nested_borrows::id_mut_pair4]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 344:0-344:92 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 349:0-349:92 -/
 def id_mut_pair4
   (T1 T2 : Type) (p : (T1 × T2)) :
   Result ((T1 × T2) × (T1 → Result T1) × (T2 → Result T2))
@@ -413,37 +418,37 @@ def id_mut_pair4
   Result.ok ((t, t1), Result.ok, Result.ok)
 
 /- [no_nested_borrows::StructWithTuple]
-   Source: 'tests/src/no_nested_borrows.rs', lines 351:0-351:34 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 356:0-356:34 -/
 structure StructWithTuple (T1 T2 : Type) where
   p : (T1 × T2)
 
 /- [no_nested_borrows::new_tuple1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 355:0-355:48 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 360:0-360:48 -/
 def new_tuple1 : Result (StructWithTuple U32 U32) :=
   Result.ok { p := (1#u32, 2#u32) }
 
 /- [no_nested_borrows::new_tuple2]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 359:0-359:48 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 364:0-364:48 -/
 def new_tuple2 : Result (StructWithTuple I16 I16) :=
   Result.ok { p := (1#i16, 2#i16) }
 
 /- [no_nested_borrows::new_tuple3]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 363:0-363:48 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:48 -/
 def new_tuple3 : Result (StructWithTuple U64 I64) :=
   Result.ok { p := (1#u64, 2#i64) }
 
 /- [no_nested_borrows::StructWithPair]
-   Source: 'tests/src/no_nested_borrows.rs', lines 368:0-368:33 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 373:0-373:33 -/
 structure StructWithPair (T1 T2 : Type) where
   p : Pair T1 T2
 
 /- [no_nested_borrows::new_pair1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 372:0-372:46 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 377:0-377:46 -/
 def new_pair1 : Result (StructWithPair U32 U32) :=
   Result.ok { p := { x := 1#u32, y := 2#u32 } }
 
 /- [no_nested_borrows::test_constants]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 380:0-380:23 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 385:0-385:23 -/
 def test_constants : Result Unit :=
   do
   let swt ← new_tuple1
@@ -473,7 +478,7 @@ def test_constants : Result Unit :=
 #assert (test_constants == Result.ok ())
 
 /- [no_nested_borrows::test_weird_borrows1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 389:0-389:28 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 394:0-394:28 -/
 def test_weird_borrows1 : Result Unit :=
   Result.ok ()
 
@@ -481,7 +486,7 @@ def test_weird_borrows1 : Result Unit :=
 #assert (test_weird_borrows1 == Result.ok ())
 
 /- [no_nested_borrows::test_mem_replace]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 399:0-399:37 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 404:0-404:37 -/
 def test_mem_replace (px : U32) : Result U32 :=
   let (y, _) := core.mem.replace U32 px 1#u32
   if ¬ (y = 0#u32)
@@ -489,71 +494,71 @@ def test_mem_replace (px : U32) : Result U32 :=
   else Result.ok 2#u32
 
 /- [no_nested_borrows::test_shared_borrow_bool1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 406:0-406:47 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 411:0-411:47 -/
 def test_shared_borrow_bool1 (b : Bool) : Result U32 :=
   if b
   then Result.ok 0#u32
   else Result.ok 1#u32
 
 /- [no_nested_borrows::test_shared_borrow_bool2]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 419:0-419:40 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 424:0-424:40 -/
 def test_shared_borrow_bool2 : Result U32 :=
   Result.ok 0#u32
 
 /- [no_nested_borrows::test_shared_borrow_enum1]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 434:0-434:52 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 439:0-439:52 -/
 def test_shared_borrow_enum1 (l : List U32) : Result U32 :=
   match l with
   | List.Cons _ _ => Result.ok 1#u32
   | List.Nil => Result.ok 0#u32
 
 /- [no_nested_borrows::test_shared_borrow_enum2]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 446:0-446:40 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 451:0-451:40 -/
 def test_shared_borrow_enum2 : Result U32 :=
   Result.ok 0#u32
 
 /- [no_nested_borrows::incr]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 457:0-457:24 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 462:0-462:24 -/
 def incr (x : U32) : Result U32 :=
   x + 1#u32
 
 /- [no_nested_borrows::call_incr]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 461:0-461:35 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:35 -/
 def call_incr (x : U32) : Result U32 :=
   incr x
 
 /- [no_nested_borrows::read_then_incr]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 466:0-466:41 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 471:0-471:41 -/
 def read_then_incr (x : U32) : Result (U32 × U32) :=
   do
   let x1 ← x + 1#u32
   Result.ok (x, x1)
 
 /- [no_nested_borrows::Tuple]
-   Source: 'tests/src/no_nested_borrows.rs', lines 472:0-472:24 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 477:0-477:24 -/
 def Tuple (T1 T2 : Type) := T1 × T2
 
 /- [no_nested_borrows::use_tuple_struct]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 474:0-474:48 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 479:0-479:48 -/
 def use_tuple_struct (x : Tuple U32 U32) : Result (Tuple U32 U32) :=
   Result.ok (1#u32, x.#1)
 
 /- [no_nested_borrows::create_tuple_struct]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 478:0-478:61 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:61 -/
 def create_tuple_struct (x : U32) (y : U64) : Result (Tuple U32 U64) :=
   Result.ok (x, y)
 
 /- [no_nested_borrows::IdType]
-   Source: 'tests/src/no_nested_borrows.rs', lines 483:0-483:20 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 488:0-488:20 -/
 @[reducible] def IdType (T : Type) := T
 
 /- [no_nested_borrows::use_id_type]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 485:0-485:40 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 490:0-490:40 -/
 def use_id_type (T : Type) (x : IdType T) : Result T :=
   Result.ok x
 
 /- [no_nested_borrows::create_id_type]:
-   Source: 'tests/src/no_nested_borrows.rs', lines 489:0-489:43 -/
+   Source: 'tests/src/no_nested_borrows.rs', lines 494:0-494:43 -/
 def create_id_type (T : Type) (x : T) : Result (IdType T) :=
   Result.ok x
 
diff --git a/tests/src/no_nested_borrows.rs b/tests/src/no_nested_borrows.rs
index 9a7604e6..88c0bc09 100644
--- a/tests/src/no_nested_borrows.rs
+++ b/tests/src/no_nested_borrows.rs
@@ -213,6 +213,11 @@ pub fn test_char() -> char {
     'a'
 }
 
+/// This triggered a bug at some point
+pub fn panic_mut_borrow(_: &mut u32) {
+    panic!()
+}
+
 /// Mutually recursive types
 pub enum Tree<T> {
     Leaf(T),
@@ -225,7 +230,7 @@ pub enum NodeElem<T> {
 }
 
 /*
-// TODO: those definitions requires semantic termination (breaks the Coq backend
+// TODO: those definitions require semantic termination (breaks the Coq backend
 // because we don't use fuel in this case).
 
 /// Mutually recursive functions