mcve rust-lang#100715

Author: raoulstrackx

input.rs

@@ -0,0 +1,5 @@
+
+#[test]
+fn test_env_set_get_huge() {
+    let _ = std::ffi::OsString::new().to_str();
+}

mcve_100715.sh

@@ -0,0 +1,22 @@
+#!/bin/bash -ex
+
+rm -rf build config.toml
+./configure --enable-lld --set llvm.ninja=false --set rust.verbose-tests=true --set profile=compiler
+# Fails with an ICE
+./x.py test --stage=1 --target=x86_64-fortanix-unknown-sgx library/std --host='' --no-doc --exclude src/tools/linkchecker --verbose -j1 || true
+
+# Mininal example triggering the ICE:
+build_dir=$(pwd)/build
+
+export RUSTC_LIBDIR="${build_dir}/x86_64-unknown-linux-gnu/stage1/lib"
+export RUSTC_REAL="${build_dir}/x86_64-unknown-linux-gnu/stage1/bin/rustc"
+export RUSTC_STAGE="1"
+export RUSTC_SYSROOT="${build_dir}/x86_64-unknown-linux-gnu/stage1"
+
+std=$(find ${build_dir}/x86_64-unknown-linux-gnu/stage1-std/x86_64-fortanix-unknown-sgx/release/deps/ -name "libstd-*.rlib")
+${build_dir}/bootstrap/debug/rustc \
+	./input.rs \
+	--test \
+	--target x86_64-fortanix-unknown-sgx \
+        --extern std=${std} \
+	-o $(mktemp)