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improve handling of eval (#3776)

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closes #3768
This commit is contained in:
Alex Lam S.L
2020-04-10 23:36:17 +01:00
committed by GitHub
parent dce9dfce0e
commit c810ecd081
5 changed files with 90 additions and 24 deletions
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4
lib/compress.js
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@@ -996,9 +996,7 @@ merge(Compressor.prototype, {
function needs_unbinding(compressor, val) {
return val instanceof AST_PropAccess
|| compressor.has_directive("use strict")
&& is_undeclared_ref(val)
&& val.name == "eval";
|| is_undeclared_ref(val) && val.name == "eval";
}
// we shouldn't compress (1,func)(something) to

15
lib/scope.js
View File

@@ -162,17 +162,22 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
}
if (node instanceof AST_SymbolRef) {
var name = node.name;
if (name == "eval" && tw.parent() instanceof AST_Call) {
for (var s = node.scope; s && !s.uses_eval; s = s.parent_scope) {
s.uses_eval = true;
}
}
var sym = node.scope.find_variable(name);
if (!sym) {
sym = self.def_global(node);
} else if (sym.scope instanceof AST_Lambda && name == "arguments") {
sym.scope.uses_arguments = true;
}
if (name == "eval") {
var parent = tw.parent();
if (parent.TYPE == "Call" && parent.expression === node) {
for (var s = node.scope; s && !s.uses_eval; s = s.parent_scope) {
s.uses_eval = true;
}
} else if (sym.undeclared) {
self.uses_eval = true;
}
}
node.thedef = sym;
node.reference(options);
return true;