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fix corner case in if_return (#3601)

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fixes #3600
This commit is contained in:
Alex Lam S.L
2019-11-19 15:45:20 +08:00
committed by GitHub
parent 67278e76c8
commit d959e0b86f
2 changed files with 32 additions and 0 deletions
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3
lib/compress.js
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@@ -1805,6 +1805,7 @@ merge(Compressor.prototype, {
stat.alternative = make_node(AST_BlockStatement, stat, {
body: body
});
statements[i] = stat;
statements[i] = stat.transform(compressor);
continue;
}
@@ -1817,6 +1818,7 @@ merge(Compressor.prototype, {
stat.condition = negated;
statements[j] = stat.body;
stat.body = next;
statements[i] = stat;
statements[i] = stat.transform(compressor);
continue;
}
@@ -1834,6 +1836,7 @@ merge(Compressor.prototype, {
stat.alternative = make_node(AST_BlockStatement, stat.alternative, {
body: body
});
statements[i] = stat;
statements[i] = stat.transform(compressor);
continue;
}

29
test/compress/if_return.js
View File

@@ -544,3 +544,32 @@ if_body_return_3: {
"PASS",
]
}
issue_3600: {
options = {
if_return: true,
inline: true,
side_effects: true,
unused: true,
}
input: {
var c = 0;
(function() {
if ([ ][c++]); else return;
return void function() {
var b = --b, a = c = 42;
return c;
}();
})();
console.log(c);
}
expect: {
var c = 0;
(function() {
if ([][c++]) b = --b, c = 42;
var b;
})();
console.log(c);
}
expect_stdout: "1"
}