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-rw-r--r--src/static/js/Changeset.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/static/js/Changeset.js b/src/static/js/Changeset.js
index e47b3052..355bef4a 100644
--- a/src/static/js/Changeset.js
+++ b/src/static/js/Changeset.js
@@ -1867,7 +1867,7 @@ exports.inverse = function (cs, lines, alines, pool) {
curLineOpIterLine = curLine;
var indexIntoLine = 0;
var done = false;
- while (!done) {
+ while (!done && curLineOpIter.hasNext()) {
curLineOpIter.next(curLineNextOp);
if (indexIntoLine + curLineNextOp.chars >= curChar) {
curLineNextOp.chars -= (curChar - indexIntoLine);