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-rw-r--r--compiler/InterpreterLoopsMatchCtxs.ml5
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/InterpreterLoopsMatchCtxs.ml b/compiler/InterpreterLoopsMatchCtxs.ml
index 3f7c023e..a1c0841a 100644
--- a/compiler/InterpreterLoopsMatchCtxs.ml
+++ b/compiler/InterpreterLoopsMatchCtxs.ml
@@ -1956,7 +1956,10 @@ let match_ctx_with_target (config : config) (span : Meta.span)
| Loop (loop_id', rg_id, kind) ->
sanity_check __FILE__ __LINE__ (loop_id' = loop_id) span;
sanity_check __FILE__ __LINE__ (kind = LoopSynthInput) span;
- let can_end = false in
+ (* If we borrow-check: we can set the abstractions as endable.
+ If we synthesize we have to constrain the region abstractions
+ a bit. *)
+ let can_end = !Config.borrow_check in
let kind : abs_kind = Loop (loop_id, rg_id, LoopCall) in
let abs = { abs with kind; can_end } in
super#visit_abs env abs