Don't eagerly typo-correct to a keyword if the next token is a right paren.

Take advantage of the delayed typo no longer being eagerly corrected to
a keyword to filter out keyword corrections (and other things like
unresolved & overloaded expressions, which have placeholder types) when
correcting typos inside of a decltype().

llvm-svn: 234623

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/typo-correction-cxx11.cpp b/clang/test/SemaCXX/typo-correction-cxx11.cpp
new file mode 100644
index 00000000000..573c6aa1171
--- /dev/null
+++ b/clang/test/SemaCXX/typo-correction-cxx11.cpp
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+namespace PR23186 {
+decltype(ned);  // expected-error-re {{use of undeclared identifier 'ned'{{$}}}}
+// The code below was triggering an UNREACHABLE in ASTContext::getTypeInfoImpl
+// once the above code failed to recover properly after making the bogus
+// correction of 'ned' to 'new'.
+template <typename>
+struct S {
+  enum { V };
+  void f() {
+    switch (0)
+    case V:
+      ;
+  }
+};
+}