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fix corner case in reduce_vars (#4802)

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fixes #4801
This commit is contained in:
Alex Lam S.L
2021-03-18 15:58:35 +00:00
committed by GitHub
parent 2508481e33
commit 3016a78d85
3 changed files with 37 additions and 7 deletions
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2
lib/compress.js
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@@ -10436,7 +10436,7 @@ merge(Compressor.prototype, {
} else {
value = fixed.optimize(compressor);
}
if (value === fixed) value = value.transform(new TreeTransformer(function(node, descend) {
value = value.transform(new TreeTransformer(function(node, descend) {
if (node instanceof AST_Scope) return node;
node = node.clone();
descend(node, this);

30
test/compress/bigint.js
View File

@@ -60,3 +60,33 @@ issue_4590: {
expect_stdout: "PASS"
node_version: ">=10"
}
issue_4801: {
options = {
booleans: true,
collapse_vars: true,
reduce_vars: true,
unused: true,
}
input: {
try {
(function(a) {
A = 42;
a || A;
})(!(0 == 42 >> 0o644n));
} catch (e) {
console.log("PASS");
}
}
expect: {
try {
(function(a) {
0 != (A = 42) >> 0o644n || A;
})();
} catch (e) {
console.log("PASS");
}
}
expect_stdout: "PASS"
node_version: ">=10"
}

12
test/compress/let.js
View File

@@ -419,36 +419,36 @@ reduce_vars_3: {
}
input: {
"use strict";
(function(scope) {
(function(a) {
let i = 1;
function f() {
i = 0;
}
for (let i = 0, x = 0; i < scope.length; i++, x++) {
for (let i = 0, x = 0; i < a.length; i++, x++) {
if (x != i) {
console.log("FAIL");
break;
}
f();
console.log(scope[i]);
console.log(a[i]);
}
console.log(i);
})([ 4, 2 ]);
}
expect: {
"use strict";
(function(scope) {
(function(a) {
let i = 1;
function f() {
i = 0;
}
for (let i = 0, x = 0; i < scope.length; i++, x++) {
for (let i = 0, x = 0; i < a.length; i++, x++) {
if (x != i) {
console.log("FAIL");
break;
}
f();
console.log(scope[i]);
console.log(a[i]);
}
console.log(i);
})([ 4, 2 ]);