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-rw-r--r--Src/hist.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/Src/hist.c b/Src/hist.c
index f7e53de74..901cd3b1a 100644
--- a/Src/hist.c
+++ b/Src/hist.c
@@ -1198,8 +1198,9 @@ histreduceblanks(void)
chline[pos] = '\0';
} else {
ptr = chline + pos;
- while ((*ptr++ = *lastptr++))
- ;
+ if (ptr < lastptr)
+ while ((*ptr++ = *lastptr++))
+ ;
}
}