[PATCH] D142384: [C++20] Fix a crash with modules.

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith added a comment.

In D142384#4102937 <https://reviews.llvm.org/D142384#4102937>, @hans wrote:

> I don't know if that's expected or not, but maybe that behavior change could be used as an inspiration for a test case.

At least this suggests a way to test this with a C++ unit test: get a `RecordDecl*` referring to a forward declaration of a struct with a definition, and iterate over its fields.


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https://reviews.llvm.org/D142384