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-rw-r--r--src/printf.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/printf.c b/src/printf.c
index 2fdc87dd2..93eefef24 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -720,7 +720,9 @@ static char *base_vprintf(
if( xRealloc ){
if( sM.zText==sM.zBase ){
sM.zText = xRealloc(0, sM.nChar+1);
- memcpy(sM.zText, sM.zBase, sM.nChar+1);
+ if( sM.zText ){
+ memcpy(sM.zText, sM.zBase, sM.nChar+1);
+ }
}else if( sM.nAlloc>sM.nChar+10 ){
sM.zText = xRealloc(sM.zText, sM.nChar+1);
}