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-rw-r--r--lib/compress.js7
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/compress.js b/lib/compress.js
index 2df76f5f..82bbbf1b 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4485,9 +4485,12 @@ merge(Compressor.prototype, {
var head = first.pop();
var def = head.definition;
if (!(def.id in prev)) continue;
- var head_refs = references[def.id];
- if (!head_refs) continue;
+ if (!references[def.id]) continue;
+ var head_refs = {
+ start: references[def.id].start,
+ };
while (def.id in merged) def = merged[def.id];
+ head_refs.end = references[def.id].end;
var skipped = [];
do {
var tail = last.pop();