Peter Klausler c9f94baca5 [flang] Fix crash in error recovery (implicit host association) (#92795) ...

When a symbol appears in a specification expression in a subprogram
contained in a host program unit, semantics may have to create a symbol
in the host and use host association to it. This shouldn't happen for
nested subprograms that can't import such a symbol, such as interface
blocks by default. Further, when host association fails, semantics
shouldn't crash.

Fixes https://github.com/llvm/llvm-project/issues/92647.

2024-05-23 13:41:08 -07:00

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