Add an assert to get information on buildbot failure.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236181 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index cd00be8adaf1f933d77560d6f1291bd043405423..231720b8db1a9de3f136d27835f95fc1c16aa7f4 100644 (file)
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -627,6 +627,7 @@ bool Preprocessor::HandleIdentifier(Token &Identifier) {
   // If this is a macro to be expanded, do it.
   if (MacroDefinition MD = getMacroDefinition(&II)) {
     auto *MI = MD.getMacroInfo();
+    assert(MI && "macro definition with no macro info?");
     if (!DisableMacroExpansion) {
       if (!Identifier.isExpandDisabled() && MI->isEnabled()) {
         // C99 6.10.3p10: If the preprocessing token immediately after the