[libcxx-commits] [libcxx] [libc++][test][msan] Fix bots after #67799 (PR #73152)

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huixie90 wrote:

> Exactly same build does not reproduce on my workstation, with Linux distribution which is from the bot.

This makes me think the timeout simply is because the test is a bit slow when compiling with msan?

there is a loop around the whole test point (to increase the likelyhood to fail in case a buggy source code). I wander reduce the loop count could help here 

https://github.com/llvm/llvm-project/pull/73152