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-rw-r--r--lib/Lex/PPCaching.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Lex/PPCaching.cpp b/lib/Lex/PPCaching.cpp
index f5e8cdc25d38..9758557d7b44 100644
--- a/lib/Lex/PPCaching.cpp
+++ b/lib/Lex/PPCaching.cpp
@@ -105,8 +105,10 @@ void Preprocessor::CachingLex(Token &Result) {
}
void Preprocessor::EnterCachingLexMode() {
- if (InCachingLexMode())
+ if (InCachingLexMode()) {
+ assert(CurLexerKind == CLK_CachingLexer && "Unexpected lexer kind");
return;
+ }
PushIncludeMacroStack();
CurLexerKind = CLK_CachingLexer;