master is on fire

[emberian]

PRs are bouncing due to test timeouts. Nothing has landed since #12085

http://buildbot.rust-lang.org/builders/auto-mac-32-opt/builds/4280/steps/test/logs/stdio

http://buildbot.rust-lang.org/builders/auto-mac-32-opt/builds/4280/steps/test/logs/stdio

cc @brson @alexcrichton

[emberian]

Very, very unfortunately, #12284 just landed. This means that the breakage is not unconditional.

[emberian]

Segfault! http://buildbot.rust-lang.org/builders/auto-linux-32-nopt-t/builds/3392/steps/test/logs/stdio

[emberian]

@kballard had also been reporting segfaults on master.

[brendanzab]

I got a segfault on #12321

running 57 tests
test async::test_remote::smoke_test ... ok
test error_smoke_test ... ok
test file::test::file_test_rmdir_chokes_on_nonexistant_path ... ok
test file::test::file_test_stat ... ok
test file::test::file_test_mk_rm_dir ... ok
test homing::test::test_homing_closes_correctly ... ok
Segmentation fault (core dumped)
make: *** [tmp/check-stage2-T-i686-unknown-linux-gnu-H-i686-unknown-linux-gnu-rustuv.ok] Error 139
program finished with exit code 2
elapsedTime=651.174504

http://buildbot.rust-lang.org/builders/auto-linux-32-nopt-t/builds/3392/steps/test/logs/stdio

[adrientetar]

What is causing this?

[brendanzab]

Weird, #12331 seemed to make it through.

[alexcrichton]

This appears to be because of a channel deadlock. Investigating now.

[alexcrichton]

Fixed the deadlock, investigating the segfault now.