[4.1] IRGen: The type layout of a metatype is not the same as the NativeObject.Type #15272
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…iveObject.Type rdar://37924505
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jckarter
approved these changes
Mar 15, 2018
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Description: Generic classes with protocol meta type stored properties crash during initialization because we ignored the second word of storage of existential meta types.
Scope: This regression was introduced because we more often initialize generic class metadata which exercises the code path the causes the crash.
Testing: CI test added.
Risk: Low
Reviewed: Joe G.
rdar://37924505