build/build-clang/android-mangling-error_clang_12.patch

   1 Workaround segfault in clang's mangling code that is tickled when
   2 attempting to mangle the declaration:
   3  std:__ndk1::__find_detail::__find_exactly_one_checked::__matches
   4 in the <tuple> header in the Android NDK.
   5 This codepath is exercised by MozsearchIndexer.cpp (the searchfox
   6 indexer) when indexing on Android. See also
   7 https://bugs.llvm.org/show_bug.cgi?id=40747
   8
   9 diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
  10 index 4420f6a2c1c3..39792e6b7350 100644
  11 --- a/clang/lib/AST/ItaniumMangle.cpp
  12 +++ b/clang/lib/AST/ItaniumMangle.cpp
  13 @@ -3954,6 +3954,11 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
  14    // produces no output, where ImplicitlyConvertedToType and AsTemplateArg need
  15    // to be preserved.
  16  recurse:
  17 +  if (!E) {
  18 +    Out << "MOZ_WE_HACKED_AROUND_BUG_1500941";
  19 +    return;
  20 +  }
  21 +
  22    switch (E->getStmtClass()) {
  23    case Expr::NoStmtClass:
  24  #define ABSTRACT_STMT(Type)