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-rw-r--r--src/LexCPP.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/LexCPP.cxx b/src/LexCPP.cxx
index e6182e8d8..8e3b7c498 100644
--- a/src/LexCPP.cxx
+++ b/src/LexCPP.cxx
@@ -124,7 +124,7 @@ static void ColouriseCppDoc(unsigned int startPos, int length, int initStyle, Wo
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
- } while (isspace(ch));
+ } while (isspace(ch) && (i < lengthDoc));
} else if (isoperator(ch)) {
styler.ColourTo(i-1, state);
styler.ColourTo(i, SCE_C_OPERATOR);