[CLANG_X] Unit test testPhysicsToolsMVAComputer/testBitSet failed

[iarspider]

In CMSSW_15_0_CLANG_X_2025-02-02-2300 IB, the unit test testPhysicsToolsMVAComputer/testBitSet failed:

 ===== Test "testPhysicsToolsMVAComputer" ====
Running .F....

testBitSet.cppunit.cc:55:Assertion
Test name: testBitSet::bitManipulationTest
assertion failed
- Expression: neg(31) == 0x80000000

Failures !!!
Run: 5   Failure total: 1   Failures: 1   Errors: 0

---> test testPhysicsToolsMVAComputer had ERRORS
TestTime:0
^^^^ End Test testPhysicsToolsMVAComputer ^^^^
>> Tests for package PhysicsTools/MVAComputer ran.

@Dr15Jones FYI

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Issue was created by @iarspider.

@Dr15Jones, @antoniovilela, @makortel, @mandrenguyen, @rappoccio, @sextonkennedy, @smuzaffar can you please review it and eventually sign/assign? Thanks.

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[iarspider]

assign PhysicsTools/MVAComputer

[cmsbuild]

New categories assigned: ml

@valsdav,@y19y19 you have been requested to review this Pull request/Issue and eventually sign? Thanks

[Dr15Jones]

The comment in the unit test seems to say that failure is 'OK' as it is intended to see if the UBSAN behavior changes (the test is meant to check that the fix for the USBAN behavior was fixed).

Should think about what that 'failure' really means.