[PATCH] D38078: [dsymutil] Don't resolve DIE reference to NULL DIE.

[Jonas Devlieghere via Phabricator via llvm-commits]

JDevlieghere created this revision.

This patch prevents dsymutil from resolving a reference to a NULL DIE
when a bogus reference happens to be coincidentally referencing a NULL
DIE. Now this is detected as an invalid reference and a warning is
printed.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=33873


Repository:
  rL LLVM

https://reviews.llvm.org/D38078

Files:
  test/tools/dsymutil/Inputs/null_die
  test/tools/dsymutil/Inputs/null_die.o
  test/tools/dsymutil/X86/null-die.s
  tools/dsymutil/DwarfLinker.cpp

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