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fix corner case in reduce_vars (#4490)

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fixes #4489
This commit is contained in:
Alex Lam S.L
2021-01-01 04:56:13 +00:00
committed by GitHub
parent 311c074622
commit 2dbafbb4ee
3 changed files with 30 additions and 8 deletions
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16
test/reduce.js
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@@ -322,7 +322,16 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
}
else if (node instanceof U.AST_Object) {
// first property's value
var expr = node.properties[0] instanceof U.AST_ObjectKeyVal && node.properties[0].value;
var expr = node.properties[0];
if (expr instanceof U.AST_ObjectKeyVal) {
expr = expr.value;
} else if (expr instanceof U.AST_Spread) {
expr = expr.expression;
} else if (expr && expr.key instanceof U.AST_Node) {
expr = expr.key;
} else {
expr = null;
}
if (expr) {
node.start._permute++;
CHANGED = true;
@@ -351,11 +360,6 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
}
}
}
else if (node instanceof U.AST_Spread) {
node.start._permute++;
CHANGED = true;
return node.expression;
}
else if (node instanceof U.AST_Switch) {
var expr = [
node.expression, // switch expression