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fix corner case in ie8 & reduce_vars (#4029)

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fixes #4028
This commit is contained in:
Alex Lam S.L
2020-07-28 20:11:02 +01:00
committed by GitHub
parent 6d3dcaa59e
commit dfe47bcc42
2 changed files with 32 additions and 1 deletions
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3
lib/compress.js
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@@ -600,6 +600,7 @@ merge(Compressor.prototype, {
return node.right;
};
} else {
if (d.single_use) d.single_use = false;
sym.fixed = d.fixed = function() {
return make_node(AST_Binary, node, {
operator: node.operator.slice(0, -1),
@@ -894,9 +895,9 @@ merge(Compressor.prototype, {
d.assignments++;
var fixed = d.fixed;
if (safe_to_read(tw, d) && safe_to_assign(tw, d)) {
if (d.single_use) d.single_use = false;
push_ref(d, exp);
mark(tw, d);
if (d.single_use) d.single_use = false;
d.fixed = function() {
return make_node(AST_Binary, node, {
operator: node.operator.slice(0, -1),