================
@@ -1132,6 +1132,12 @@ void Parser::AnnotateExistingDecltypeSpecifier(const
DeclSpec &DS,
// make sure we have a token we can turn into an annotation token
if (PP.isBacktrackEnabled()) {
PP.RevertCachedTokens(1);
+ if (DS.getTypeSpecType() == TST_error) {
+ // make sure we have meaningful cached tokens
+ if (EndLoc.isValid() && StartLoc.isValid() && EndLoc != StartLoc) {
----------------
erichkeane wrote:
Not really a bit of code I play with, the != and `EndLoc` conditions here seem
odd to me. Why do we care that the `EndLoc`, which we are going to assign, is
valid? And why would them being different matter for the caching?
https://github.com/llvm/llvm-project/pull/167114
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