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fix corner cases in functions & merge_vars (#4156)

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fixes #4155
This commit is contained in:
Alex Lam S.L
2020-09-26 08:31:33 +01:00
committed by GitHub
parent 9882a9f4af
commit b4ff6d0f2d
3 changed files with 75 additions and 2 deletions
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8
lib/compress.js
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@@ -4449,7 +4449,9 @@ merge(Compressor.prototype, {
segment.block = node;
walk_body(node, tw);
if (node.bcatch) {
references[node.bcatch.argname.definition().id] = false;
var def = node.bcatch.argname.definition();
references[def.id] = false;
if (def = def.redefined()) references[def.id] = false;
pop();
push();
walk_body(node.bcatch, tw);
@@ -4843,8 +4845,10 @@ merge(Compressor.prototype, {
&& !compressor.option("ie8")
&& var_defs.length == 1
&& sym.assignments == 0
&& def.value === def.name.fixed_value()
&& def.value instanceof AST_Function
&& (sym.references.length ? all(sym.references, function(ref) {
return def.value === ref.fixed_value();
}) : def.value === def.name.fixed_value())
&& (!def.value.name || (old_def = def.value.name.definition()).assignments == 0
&& (old_def.name == def.name.name || all(old_def.references, function(ref) {
return ref.scope.find_variable(def.name) === def.name.definition();