[AST] check modules before recursing for display decls #40860
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After testing locally with one of the original source-compat failures, it seems like this still creates a failure if you try to generate symbol graphs. I'm going to try a different approach and push that up. |
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slavapestov
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Resolves rdar://87601741
In #40810,
ModuleDecl::getDisplayDeclsstarted to recurse into modules that were marked as@_exported importfor collecting decls. This caused some failures in source compatibility testing, due to recursing into Clang modules during serialization that tripped an assertion. This PR adds a check against these modules before recursing, so that Clang modules that should not be recursed into can be skipped.