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fix corner case in reduce_vars (#5464)

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fixes #5463
This commit is contained in:
Alex Lam S.L
2022-05-23 04:08:12 +01:00
committed by GitHub
parent c2ca7b7659
commit d4caa97b88
2 changed files with 33 additions and 6 deletions
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13
lib/compress.js
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@@ -766,14 +766,14 @@ Compressor.prototype.compress = function(node) {
function make_fixed_default(compressor, node, save) {
var prev_save, prev_seq;
return function() {
if (prev_seq === node) return node;
var current = save();
var ev;
if (!is_undefined(current, compressor) && (ev = fuzzy_eval(compressor, current, true)) !== undefined) {
return ev instanceof AST_Node ? node : current;
}
if (prev_save !== current) {
var ev = fuzzy_eval(compressor, current, true);
if (ev instanceof AST_Node) {
prev_seq = node;
} else if (prev_save !== current) {
prev_save = current;
prev_seq = make_sequence(node, [ current, node.value ]);
prev_seq = ev === undefined ? make_sequence(node, [ current, node.value ]) : current;
}
return prev_seq;
};
@@ -9152,6 +9152,7 @@ Compressor.prototype.compress = function(node) {
function fuzzy_eval(compressor, node, nullish) {
if (node.truthy) return true;
if (is_undefined(node)) return undefined;
if (node.falsy && !nullish) return false;
if (node.is_truthy()) return true;
return node.evaluate(compressor, true);