[Bug] fix uninitialized member vars #3848
Merged
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Ref #3821
This fix is based on UBSAN unit test. So if we create & use class obj in a different way, may have
runtime error: load of value XX, which is not a valid value for type 'YYY'warnings again.Unit test should build in DEBUG or XXSAN mode(at lease DEBUG). RELEASE mode will add
-DNDEBUG, turn off dchecks/asserts/debug.