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fix corner cases in collapse_vars & unused (#4807)

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fixes #4806
This commit is contained in:
Alex Lam S.L
2021-03-20 19:51:03 +00:00
committed by GitHub
parent b89cc84c3a
commit 24619daf68
3 changed files with 121 additions and 13 deletions
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83
test/compress/drop-unused.js
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@@ -3274,3 +3274,86 @@ issue_4662: {
}
expect_stdout: "1 1"
}
issue_4806_1: {
options = {
evaluate: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
};
var a;
(a = 42, O.f)();
a;
}
expect: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
};
(0, O.f)();
42;
}
expect_stdout: "PASS"
}
issue_4806_2: {
options = {
sequences: true,
toplevel: true,
unused: true,
}
input: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
};
var a;
(a = 42, O.f)();
a;
}
expect: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
},
(0, O.f)();
}
expect_stdout: "PASS"
}
issue_4806_3: {
options = {
side_effects: true,
toplevel: true,
unused: true,
}
input: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
};
var a;
(a = 42, O.f)();
a;
}
expect: {
O = {
f: function() {
console.log(this === O ? "FAIL" : "PASS");
},
};
(0, O.f)();
}
expect_stdout: "PASS"
}