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fix corner case in awaits (#5828)

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fixes #5791
This commit is contained in:
Alex Lam S.L
2024-06-06 04:51:02 +03:00
committed by GitHub
parent c21a8eee7b
commit 09910771a1
2 changed files with 81 additions and 2 deletions
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20
lib/compress.js
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@@ -3964,12 +3964,19 @@ Compressor.prototype.compress = function(node) {
for (var index = statements.length; --index >= 0;) {
var stat = statements[index];
if (!(stat instanceof AST_SimpleStatement)) break;
var node = stat.body;
var node = stat.body.tail_node();
if (!(node instanceof AST_Await)) break;
var exp = node.expression;
if (!needs_enqueuing(compressor, exp)) break;
changed = true;
exp = exp.drop_side_effect_free(compressor, true);
if (stat.body instanceof AST_Sequence) {
var expressions = stat.body.expressions.slice();
expressions.pop();
if (exp) expressions.push(exp);
stat.body = make_sequence(stat.body, expressions);
break;
}
if (exp) {
stat.body = exp;
break;
@@ -11752,7 +11759,16 @@ Compressor.prototype.compress = function(node) {
return !lazy_op[node.operator]
|| needs_enqueuing(compressor, node.left) && needs_enqueuing(compressor, node.right);
}
if (node instanceof AST_Call) return is_async(node.expression);
if (node instanceof AST_Call) {
if (!is_async(node.expression)) return false;
var has_await = false;
walk_body(node.expression, new TreeWalker(function(expr) {
if (has_await) return true;
if (expr instanceof AST_Await) return has_await = true;
if (expr !== node && expr instanceof AST_Scope) return true;
}));
return !has_await;
}
if (node instanceof AST_Conditional) {
return needs_enqueuing(compressor, node.consequent) && needs_enqueuing(compressor, node.alternative);
}