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facilitate fix for #1531 (#1542)

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This commit is contained in:
Alex Lam S.L
2017-03-03 07:12:24 +08:00
committed by GitHub
parent e5cb9275df
commit b5e0e8c203
1 changed files with 8 additions and 7 deletions
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15
lib/compress.js
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@@ -181,6 +181,13 @@ merge(Compressor.prototype, {
var reduce_vars = rescan && compressor.option("reduce_vars"); var reduce_vars = rescan && compressor.option("reduce_vars");
var safe_ids = []; var safe_ids = [];
push(); push();
var suppressor = new TreeWalker(function(node) {
if (node instanceof AST_Symbol) {
var d = node.definition();
if (node instanceof AST_SymbolRef) d.references.push(node);
d.fixed = false;
}
});
var tw = new TreeWalker(function(node){ var tw = new TreeWalker(function(node){
if (!(node instanceof AST_Directive || node instanceof AST_Constant)) { if (!(node instanceof AST_Directive || node instanceof AST_Constant)) {
node._squeezed = false; node._squeezed = false;
@@ -243,13 +250,7 @@ merge(Compressor.prototype, {
return true; return true;
} }
if (node instanceof AST_ForIn) { if (node instanceof AST_ForIn) {
var sym = node.init; node.init.walk(suppressor);
if (sym instanceof AST_Var) {
sym = sym.definitions[0].name;
}
var d = sym.definition();
d.references.push(sym);
d.fixed = false;
node.object.walk(tw); node.object.walk(tw);
push(); push();
node.body.walk(tw); node.body.walk(tw);