T8089 mysteriously fails when GHC is built with LLVM

CircleCI's LLVM build revealed that T8089 fails. The test is quite simple,

main = threadDelay maxBound

and is expected to timeout. However, it somehow exits with code 0 in all ways when built with LLVM.

This didn't reproduce when I tried make test TEST=T8089 EXTRA_HC_OPTS=-fllvm locally, so either it's a library issue or environment-sensitive.

Trac metadata

Trac field	Value
Version	8.2.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (LLVM)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed milestone to %8.6.1

changed weight to 5

added LLVM backend Tbug Trac import labels

changed weight to 10

Setting priority to highest as this may be miscompilation.

Trac metadata

Trac field	Value
Priority	normal → highest

added CI breakage label

mentioned in issue #15158 (closed)

assigned to @bgamari

assigned to @osa1 and unassigned @bgamari

Can't reproduce locally. Can you share the circleci link that shows the failure? What version of llvm does circleci use?

changed milestone to %8.8.1

This won't be fixed for GHC 8.6.

added Phighest label

I believe this is now resolved.

closed