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-rw-r--r--src/insert.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/insert.c b/src/insert.c
index 52769e9c4..7ac2a2559 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1408,7 +1408,7 @@ void sqlite3GenerateConstraintChecks(
int x;
if( iField==XN_EXPR ){
pParse->ckBase = regNewData+1;
- sqlite3ExprCode(pParse, pIdx->aColExpr->a[i].pExpr, regIdx+i);
+ sqlite3ExprCodeCopy(pParse, pIdx->aColExpr->a[i].pExpr, regIdx+i);
pParse->ckBase = 0;
VdbeComment((v, "%s column %d", pIdx->zName, i));
}else{