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fix corner case in passes & reduce_vars (#4316)

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fixes #4315
This commit is contained in:
Alex Lam S.L
2020-11-22 23:05:20 +00:00
committed by GitHub
parent 9f67866147
commit 1e8fa1aa1d
2 changed files with 48 additions and 8 deletions
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19
lib/compress.js
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@@ -597,9 +597,10 @@ merge(Compressor.prototype, {
function scan_declaration(tw, lhs, fixed, visit) {
var scanner = new TreeWalker(function(node) {
if (node instanceof AST_DestructuredArray) {
reset_flags(node);
var save = fixed;
node.elements.forEach(function(node, index) {
if (node instanceof AST_Hole) return;
if (node instanceof AST_Hole) return reset_flags(node);
fixed = function() {
return make_node(AST_Sub, node, {
expression: save(),
@@ -614,8 +615,10 @@ merge(Compressor.prototype, {
return true;
}
if (node instanceof AST_DestructuredObject) {
reset_flags(node);
var save = fixed;
node.properties.forEach(function(node) {
reset_flags(node);
if (node.key instanceof AST_Node) {
push(tw);
node.key.walk(tw);
@@ -1112,6 +1115,13 @@ merge(Compressor.prototype, {
node.DEFMETHOD("reduce_vars", func);
});
function reset_flags(node) {
node._squeezed = false;
node._optimized = false;
delete node.fixed;
if (node instanceof AST_Scope) delete node._var_names;
}
AST_Toplevel.DEFMETHOD("reset_opt_flags", function(compressor) {
var tw = new TreeWalker(compressor.option("reduce_vars") ? function(node, descend) {
reset_flags(node);
@@ -1129,13 +1139,6 @@ merge(Compressor.prototype, {
// - backup & restore via `save_ids` when visiting out-of-order sections
tw.safe_ids = Object.create(null);
this.walk(tw);
function reset_flags(node) {
node._squeezed = false;
node._optimized = false;
delete node.fixed;
if (node instanceof AST_Scope) delete node._var_names;
}
});
AST_Symbol.DEFMETHOD("fixed_value", function() {