[PATCH] D41575: [index] Return when DC is null in handleReference

Fangrui Song via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Wed Jan 3 09:38:02 PST 2018

MaskRay added a comment.

HighCommander4 narrowed it down https://github.com/jacobdufault/cquery/issues/219#issuecomment-354903152  to a much simpler reproduce:

  template <typename>
  struct actor;
  template <template <typename> class Actor = actor>
  struct terminal;

This may trigger null pointer dereference of `DC` (because it calls `cast`). If the default template argument is removed, the crash goes away.

  rC Clang


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