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-rw-r--r--src/parseTools.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/parseTools.js b/src/parseTools.js
index 7fde34fb..39e76307 100644
--- a/src/parseTools.js
+++ b/src/parseTools.js
@@ -581,7 +581,7 @@ function parseI64Constant(str) {
}
function subtract(v, w) { // v -= w. we assume v >= w
- while (v.length > w.length) w.push(0);
+ while (v.length > w.length) w.splice(0, 0, 0);
for (var i = 0; i < v.length; i++) {
v[i] -= w[i];
if (v[i] < 0) {