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-rw-r--r--soltools/cpp/_tokens.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/soltools/cpp/_tokens.c b/soltools/cpp/_tokens.c
index e31ccbd1c4ff..c764886593d6 100644
--- a/soltools/cpp/_tokens.c
+++ b/soltools/cpp/_tokens.c
@@ -295,7 +295,8 @@ void
size_t nby;
nby = (char *) str->lp - (char *) str->bp;
- memmove(dtr->tp, str->bp, nby);
+ if (nby)
+ memmove(dtr->tp, str->bp, nby);
}
/*