JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix corner case in side_effects (#4009)

Browse Source 
fixes #4008
This commit is contained in:
Alex Lam S.L
2020-07-01 04:33:48 +01:00
committed by GitHub
parent 3bf8699f95
commit 484d3fd8c7
2 changed files with 67 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/compress.js
View File

@@ -5303,10 +5303,7 @@ merge(Compressor.prototype, {
return make_sequence(this, [ expression, property ]);
});
def(AST_SymbolRef, function(compressor) {
if (!this.is_declared(compressor)) return this;
var def = this.definition();
if (member(this, def.references)) def.replaced++;
return null;
return this.is_declared(compressor) ? null : this;
});
def(AST_This, return_null);
def(AST_Unary, function(compressor, first_in_statement) {
@@ -5314,10 +5311,7 @@ merge(Compressor.prototype, {
this.write_only = !this.expression.has_side_effects(compressor);
return this;
}
if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef) {
this.expression.definition().replaced++;
return null;
}
if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef) return null;
var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
if (first_in_statement && expression && is_iife_call(expression)) {
if (expression === this.expression && this.operator == "!") return this;