Spurious "filename too long" failure on bots

[alexcrichton]

http://buildbot.rust-lang.org/builders/auto-win-gnu-32-opt-rustbuild/builds/1204
https://gist.github.com/alexcrichton/e72877d88345cac07278c6449cc343e8

failures:

---- sync::atomic::AtomicU8::load_0 stdout ----
    thread 'sync::atomic::AtomicU8::load_0' panicked at 'couldn't run the test: The filename or extension is too long. (os error 206)', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:304
note: Run with `RUST_BACKTRACE=1` for a backtrace.

---- sync::atomic::AtomicUsize::fetch_xor_0 stdout ----
    thread 'sync::atomic::AtomicUsize::fetch_xor_0' panicked at 'couldn't run the test: The filename or extension is too long. (os error 206)', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:304

---- sync::atomic_1 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'sync::atomic_1' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'sync::atomic_1' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- sync::atomic::AtomicUsize::load_0 stdout ----
    thread 'sync::atomic::AtomicUsize::load_0' panicked at 'couldn't run the test: The filename or extension is too long. (os error 206)', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:304

---- unimplemented!_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'unimplemented!_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'unimplemented!_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- sync::atomic::AtomicUsize::store_0 stdout ----
    thread 'sync::atomic::AtomicUsize::store_0' panicked at 'couldn't run the test: The filename or extension is too long. (os error 206)', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:304

---- try!_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'try!_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'try!_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- unimplemented!_1 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'unimplemented!_1' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'unimplemented!_1' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- sync::atomic_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'sync::atomic_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'sync::atomic_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- unreachable!_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'unreachable!_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'unreachable!_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- sync::atomic::AtomicUsize::swap_0 stdout ----
    thread 'sync::atomic::AtomicUsize::swap_0' panicked at 'couldn't run the test: The filename or extension is too long. (os error 206)', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:304

---- unreachable!_1 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'unreachable!_1' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'unreachable!_1' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- write!_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'write!_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'write!_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281

---- writeln!_0 stdout ----
    error: could not exec the linker `gcc`: The filename or extension is too long. (os error 206)
thread 'writeln!_0' panicked at 'Box<Any>', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustc\session/mod.rs:169
thread 'writeln!_0' panicked at 'couldn't compile the test', C:\bot\slave\auto-win-gnu-32-opt-rustbuild\build\src\librustdoc\test.rs:281


failures:
    sync::atomic::AtomicU8::load_0
    sync::atomic::AtomicUsize::fetch_xor_0
    sync::atomic::AtomicUsize::load_0
    sync::atomic::AtomicUsize::store_0
    sync::atomic::AtomicUsize::swap_0
    sync::atomic_0
    sync::atomic_1
    try!_0
    unimplemented!_0
    unimplemented!_1
    unreachable!_0
    unreachable!_1
    write!_0
    writeln!_0

test result: FAILED. 927 passed; 14 failed; 9 ignored; 0 measured

Weird!

[retep998]

This error can occur when the gcc command is over 32,767 characters. It would be nice if there was some way to check the length of the lpCommandLine that is passed to CreateProcessW when spawning a Command so a better diagnostic can be emitted. At the very least print out the linker arguments when that error code occurs.

[alexcrichton]

Failure appears to always be the auto-win-gnu-32-opt-rustbuild builder so far, probably related to how cargo passes a few extra arguments.