[all-commits] [llvm/llvm-project] 9462ce: [flang] Fix crash when handling benign USE conflic...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9462ce885b2a067fdd20568ba9105489f3b34c53
      https://github.com/llvm/llvm-project/commit/9462ce885b2a067fdd20568ba9105489f3b34c53
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2025-01-08 (Wed, 08 Jan 2025)

  Changed paths:
    M flang/lib/Semantics/resolve-names.cpp
    A flang/test/Semantics/bug121718.f90

  Log Message:
  -----------
  [flang] Fix crash when handling benign USE conflict (#121977)

When the same name is used for distinct derived types in two modules,
and at least one of those modules also defines a generic interface of
the same name, name resolution crashes when both modules are USE'd into
the same scope. The crash is due to some pointers into the symbol table
becoming invalid when a symbol is replaced with a UseErrorDetails; set
them to null. Also allow for extending a UseErrorDetails in place rather
than emitting a spurious error message.

Fixes https://github.com/llvm/llvm-project/issues/121718.



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