`test/standalone/tsan` fails to build randomly in CI

[alexrp]

test
+- test-standalone
   +- standalone_test_cases
      +- standalone_test_cases.tsan
         +- install tsan_linux_loongarch64
            +- compile exe tsan_linux_loongarch64 Debug loongarch64-linux failure
error: Program aborted due to an unhandled Error:
No such file or directory
error: the following command terminated unexpectedly:
/home/ci/.cache/act/b15cca0a2e938b9b/hostexecutor/build-debug/stage3-debug/bin/zig build-exe -fsanitize-thread -ODebug -target loongarch64-linux -mcpu baseline -Mroot=/home/ci/.cache/act/b15cca0a2e938b9b/hostexecutor/test/standalone/tsan/main.zig --cache-dir /home/ci/.cache/act/b15cca0a2e938b9b/hostexecutor/zig-local-cache --global-cache-dir /home/ci/.cache/act/b15cca0a2e938b9b/hostexecutor/zig-global-cache --name tsan_linux_loongarch64 -L /home/ci/deps/zig+llvm+lld+clang-x86_64-freebsd-none-0.16.0-dev.312+164c598cd/lib -I /home/ci/deps/zig+llvm+lld+clang-x86_64-freebsd-none-0.16.0-dev.312+164c598cd/include --zig-lib-dir /home/ci/.cache/act/b15cca0a2e938b9b/hostexecutor/lib/ --listen=-

I've seen this both on Linux and FreeBSD CI. The particular target of the compiled executable doesn't seem to matter.

I'll disable this test for now, but we should probably try to get to the bottom of this. I can't repro it locally though.

[alexrp]

cc @Rexicon226 (#24734)

[Rexicon226]

I would be very interested to know what it is even trying to open. If anyone is able to repro this with strace or something, that would be big.

[alexrp]

FWIW, that error appears to come from LLVM:

❯ git grep "Program aborted due to an unhandled Error"
• llvm/lib/Support/Error.cpp
129:14:  dbgs() << "Program aborted due to an unhandled Error:\n";

• llvm/unittests/ADT/FallibleIteratorTest.cpp
184:8:      "Program aborted due to an unhandled Error:")

• llvm/unittests/Support/ErrorTest.cpp
111:17:               "Program aborted due to an unhandled Error:")
137:17:               "Program aborted due to an unhandled Error:")
152:17:               "Program aborted due to an unhandled Error:")

I'm thinking maybe from LLD...?