Use shrinked output built into the test harness.

servo/rustc-test@e3a9adc

Also proposed upstream at rust-lang/rust#31887

Author: SimonSapin

Cargo.toml

@@ -43,7 +43,7 @@ heapsize_plugin = { version = "0.1.0", optional = true }
 
 [dev-dependencies]
 rustc-serialize = "0.3.15"
-rustc-test = "0.1"
+rustc-test = "0.1.3"
 
 [build-dependencies]
 phf_codegen = "0.7.3"

scripts/shrink-test-output.py

@@ -10,13 +10,13 @@
 
 set -ex
 
-./scripts/shrink-test-output.py cargo test --color always
-
 if [ $TRAVIS_RUST_VERSION = nightly ]
 then
-    ./scripts/shrink-test-output.py cargo test --color always --features unstable
-
+    cargo test --features "rustc-test/capture"
+    cargo test --features "rustc-test/capture unstable"
     cargo test --manifest-path capi/Cargo.toml
+else
+    cargo test
 fi
 
 cargo doc