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-rw-r--r--src/malloc.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/malloc.c b/src/malloc.c
index af83743fc..68d9f5f55 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -793,9 +793,14 @@ char *sqlite3DbStrNDup(sqlite3 *db, const char *z, u64 n){
*/
char *sqlite3DbSpanDup(sqlite3 *db, const char *zStart, const char *zEnd){
int n;
+#ifdef SQLITE_DEBUG
+ /* Because of the way the parser works, the span is guaranteed to contain
+ ** at least one non-space character */
+ for(n=0; sqlite3Isspace(zStart[n]); n++){ assert( &zStart[n]<zEnd ); }
+#endif
while( sqlite3Isspace(zStart[0]) ) zStart++;
n = (int)(zEnd - zStart);
- while( ALWAYS(n>0) && sqlite3Isspace(zStart[n-1]) ) n--;
+ while( sqlite3Isspace(zStart[n-1]) ) n--;
return sqlite3DbStrNDup(db, zStart, n);
}