Fix debug info generation for this (#5534)
#5536
Merged
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My recent changes to correct AST inaccuracies around
thisobjects caused crashes in debug info generation forthis. This resolves the crashes by making the code behave correctly whenthisis a reference.This has no change to debug info output. The added test case should verify the same output we've always had, but is an important addition since this was not tested in our pre-merge testing.
Fixes #5530
Cherry-pick of dc82ed2