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fix corner case in reduce_vars (#3632)

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fixes #3631
This commit is contained in:
Alex Lam S.L
2019-12-10 09:45:51 +00:00
committed by GitHub
parent fe19ab7c57
commit 18c2b1841b
2 changed files with 48 additions and 2 deletions
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4
lib/compress.js
View File

@@ -648,7 +648,7 @@ merge(Compressor.prototype, {
tw.in_loop = this;
push(tw);
this.body.walk(tw);
if (has_break_or_continue(this)) {
if (has_break_or_continue(this, tw.parent())) {
pop(tw);
push(tw);
}
@@ -665,7 +665,7 @@ merge(Compressor.prototype, {
if (this.condition) this.condition.walk(tw);
this.body.walk(tw);
if (this.step) {
if (has_break_or_continue(this)) {
if (has_break_or_continue(this, tw.parent())) {
pop(tw);
push(tw);
}

46
test/compress/reduce_vars.js
View File

@@ -6801,3 +6801,49 @@ issue_3622: {
}
expect_stdout: "PASS"
}
issue_3631_1: {
options = {
evaluate: true,
reduce_vars: true,
toplevel: true,
}
input: {
var c = 0;
L: do {
for (;;) continue L;
var b = 1;
} while (b && c++);
console.log(c);
}
expect: {
var c = 0;
L: do {
for (;;) continue L;
var b = 1;
} while (b && c++);
console.log(c);
}
expect_stdout: "0"
}
issue_3631_2: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
L: for (var a = 1; a--; console.log(b)) {
for (;;) continue L;
var b = "FAIL";
}
}
expect: {
L: for (var a = 1; a--; console.log(b)) {
for (;;) continue L;
var b = "FAIL";
}
}
expect_stdout: "undefined"
}