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fix corner case in ie8 & reduce_vars

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fixes #3918
This commit is contained in:
alexlamsl 2020-05-22 08:45:31 +08:00
parent aeb9ea5ac2
commit a2a9f377de
2 changed files with 35 additions and 0 deletions
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2
lib/compress.js
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@ -7515,6 +7515,8 @@ merge(Compressor.prototype, {
scope.inlined = true;
} while (scope = scope.parent_scope);
}
} else if (compressor.option("ie8") && fixed.name && def !== fixed.name.definition()) {
single_use = false;
}
if (single_use) fixed.parent_scope = self.scope;
} else if (!fixed || !fixed.is_constant_expression()) {

33
test/compress/ie8.js
View File

@ -2489,3 +2489,36 @@ issue_3889: {
}
expect_stdout: "undefined"
}
issue_3918: {
options = {
conditionals: true,
ie8: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
mangle = {
ie8: true,
}
input: {
if (console.log("PASS")) {
var a = function f() {
f.p;
try {
console.log("FAIL");
} catch (e) {}
}, b = a;
}
}
expect: {
var a;
console.log("PASS") && (a = function f() {
f.p;
try {
console.log("FAIL");
} catch (o) {}
}, a);
}
expect_stdout: "PASS"
}