Improve test failure ergonomics

3 files changed, 37 insertions, 10 deletions

diff --git a/Cargo.lock b/Cargo.lock
index fc30d65..0291f2d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,6 +56,16 @@ version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "cc"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "ctor"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -76,6 +86,7 @@ dependencies = [
  "pretty_assertions 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_cbor 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stacker 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "term-painter 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -174,6 +185,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "libc"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "maplit"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -313,6 +329,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "stacker"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "syn"
 version = "0.15.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -419,6 +446,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "560c32574a12a89ecd91f5e742165893f86e3ab98d21f8ea548658eb9eef5f40"
 "checksum bytecount 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be0fdd54b507df8f22012890aadd099979befdba27713c767993f8380112ca7c"
 "checksum byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a019b10a2a7cdeb292db131fc8113e57ea2a908f6e7894b0c3c671893b65dbeb"
+"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
+"checksum cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11d43355396e872eefb45ce6342e4374ed7bc2b3a502d1b28e36d6e23c05d1f4"
 "checksum ctor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3b4c17619643c1252b5f690084b82639dd7fac141c57c8e77a00e0148132092c"
 "checksum difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
 "checksum digest 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)" = "03b072242a8cbaf9c145665af9d250c59af3b958f83ed6824e13533cf76d5b90"
@@ -429,6 +458,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7e81a7c05f79578dbc15793d8b619db9ba32b4577003ef3af1a91c416798c58d"
 "checksum itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b8467d9c1cebe26feb08c640139247fac215782d35371ade9a2136ed6085358"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
+"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
 "checksum maplit 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "08cbb6b4fef96b6d77bfc40ec491b1690c779e77b05cd9f07f787ed376fd4c43"
 "checksum memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2efc7bc57c883d4a4d6e3246905283d8dae951bb3bd32f49d6ef297f546e1c39"
 "checksum nom 4.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6"
@@ -445,6 +475,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_cbor 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "45cd6d95391b16cd57e88b68be41d504183b7faae22030c0cc3b3f73dd57b2fd"
 "checksum serde_derive 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)" = "58fc82bec244f168b23d1963b45c8bf5726e9a15a9d146a067f9081aeed2de79"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
+"checksum stacker 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fb79482f57cf598af52094ec4cc3b3c42499d3ce5bd426f2ac41515b7e57404b"
 "checksum syn 0.15.31 (registry+https://github.com/rust-lang/crates.io-index)" = "d2b4cfac95805274c6afdb12d8f770fa2d27c045953e7b630a81801953699a9a"
 "checksum term 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "fa63644f74ce96fbeb9b794f66aff2a52d601cbd5e80f4b97123e3899f4570f1"
 "checksum term-painter 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "dcaa948f0e3e38470cd8dc8dcfe561a75c9e43f28075bb183845be2b9b3c08cf"
diff --git a/dhall/Cargo.toml b/dhall/Cargo.toml
index d1c921f..6766204 100644
--- a/dhall/Cargo.toml
+++ b/dhall/Cargo.toml
@@ -21,6 +21,7 @@ dhall_generator = { path = "../dhall_generator" }
 
 [dev-dependencies]
 pretty_assertions = "0.6.1"
+stacker = "0.1.5"
 
 [build-dependencies]
 walkdir = "2"
diff --git a/dhall/src/tests.rs b/dhall/src/tests.rs
index 915c181..7f85b5c 100644
--- a/dhall/src/tests.rs
+++ b/dhall/src/tests.rs
@@ -71,16 +71,11 @@ pub fn run_test_with_bigger_stack(
 ) -> std::result::Result<(), String> {
     // Many tests stack overflow in debug mode
     let base_path: String = base_path.to_string();
-    std::thread::Builder::new()
-        .stack_size(4 * 1024 * 1024)
-        .spawn(move || {
-            run_test(&base_path, feature, status)
-                .map_err(|e| e.to_string())
-                .map(|_| ())
-        })
-        .unwrap()
-        .join()
-        .unwrap()
+    stacker::grow(4 * 1024 * 1024, move || {
+        run_test(&base_path, feature, status)
+            .map_err(|e| e.to_string())
+            .map(|_| ())
+    })
 }
 
 pub fn run_test(