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internal: running bun's test suite concurrently causes many unusual failures #8071

@paperclover

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@paperclover

see #7758

concurrency enabled makes the test suite run ~3x faster on my machine
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but many tests fail. here is a nonconcurrent run

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it seems running tests under load causes some tests to simply fail without running

for example, this test file completely fails, and it is quite simple to reproduce

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what is really odd is that the second to last test is marked as .skip and yet still fails.

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