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fix corner case in reduce_vars (#4636)

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This commit is contained in:
Alex Lam S.L
2021-02-10 02:37:00 +00:00
committed by GitHub
parent c76481341c
commit 5ec82e5801
2 changed files with 67 additions and 1 deletions
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3
lib/compress.js
View File

@@ -9836,7 +9836,8 @@ merge(Compressor.prototype, {
}
} while (scope = scope.parent_scope);
}
} else if (fixed.name && fixed.name.name == "await" && is_async(fixed)) {
} else if (fixed.name && (fixed.name.name == "await" && is_async(fixed)
|| fixed.name.name == "yield" && is_generator(fixed))) {
single_use = false;
}
if (single_use) fixed.parent_scope = self.scope;

65
test/compress/yields.js
View File

@@ -255,6 +255,71 @@ collapse_property_lambda: {
node_version: ">=4"
}
defun_name: {
input: {
function* yield() {
console.log("PASS");
}
yield().next();
}
expect: {
function* yield() {
console.log("PASS");
}
yield().next();
}
expect_stdout: "PASS"
node_version: ">=4"
}
drop_fname: {
rename = true
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
mangle = {
toplevel: true,
}
input: {
function* yield() {
console.log("PASS");
}
yield().next();
}
expect: {
(function*() {
console.log("PASS");
})().next();
}
expect_stdout: "PASS"
node_version: ">=4"
}
keep_fname: {
options = {
keep_fnames: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
function* yield() {
console.log("PASS");
}
yield().next();
}
expect: {
function* yield() {
console.log("PASS");
}
yield().next();
}
expect_stdout: "PASS"
node_version: ">=4"
}
evaluate: {
options = {
evaluate: true,