owenpan added a comment.

After applying this patch, we got a different assertion failure on a bunch of 
files in `clang/test`, e.g.:

  ~/llvm-project/clang$ for f in $(find . -name \*.cpp -o -name \*.c) ; do 
clang-format $f > /dev/null ; done
  Assertion failed: (OpeningParen.is(tok::l_paren)), function parseParens, file 
TokenAnnotator.cpp, line 216.
  PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash 
backtrace.
  Stack dump:
  0.    Program arguments: cf ./test/Driver/ignore-xcoff-visibility.cpp
  ...



================
Comment at: clang/lib/Format/TokenAnnotator.cpp:216
     FormatToken &OpeningParen = *CurrentToken->Previous;
     assert(OpeningParen.is(tok::l_paren));
     FormatToken *PrevNonComment = OpeningParen.getPreviousNonComment();
----------------
This patch either uncovers or causes an assertion failure here on a bunch of 
files in `clang/test`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121550/new/

https://reviews.llvm.org/D121550

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