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workaround pure_getters=true when dropping unused assignments (#2939)

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fixes #2938
This commit is contained in:
Alex Lam S.L
2018-02-20 17:38:40 +08:00
committed by GitHub
parent 70474310f3
commit 39a907bde3
3 changed files with 57 additions and 4 deletions
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8
lib/compress.js
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@@ -3028,9 +3028,11 @@ merge(Compressor.prototype, {
} else if (node instanceof AST_Unary && node.write_only) {
sym = node.expression;
}
while (sym instanceof AST_PropAccess && !sym.expression.may_throw_on_access(compressor)) {
if (sym instanceof AST_Sub) props.unshift(sym.property);
sym = sym.expression;
if (/strict/.test(compressor.option("pure_getters"))) {
while (sym instanceof AST_PropAccess && !sym.expression.may_throw_on_access(compressor)) {
if (sym instanceof AST_Sub) props.unshift(sym.property);
sym = sym.expression;
}
}
return sym;
};