test_vector_concurrency iterator invalidation case fails occasionally #1012
Description
The test_vector_concurrency test typically passes, but may occasionally encounter the following failure:
-------------------------------------------------------------------------------
multi_threaded_vector
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D:\a\1\s\test\test\multi_threaded_vector.cpp(455)
...............................................................................
D:\a\1\s\test\test\multi_threaded_vector.cpp(419): FAILED:
CHECK( conditional_unbox<T>(t) == 1 )
with expansion:
42 == 1
===============================================================================
test cases: 80 | 79 passed | 1 failed
assertions: 2864 | 2863 passed | 1 failed
===============================================================================
It's not immediately clear whether this is a problem with the product code, or the test code. This failure may have been masked for a while due to the fact that until #1011, test failures would be silently ignored and not fail the build pipeline.
@kennykerr FYI
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