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fix corner case in unsafe_math (#3677)

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fixes #3676
This commit is contained in:
Alex Lam S.L
2020-01-08 10:28:10 +08:00
committed by GitHub
parent f5ceff6e4b
commit 14c35739dd
2 changed files with 35 additions and 1 deletions
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4
lib/compress.js
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@@ -6529,7 +6529,9 @@ merge(Compressor.prototype, {
&& self.right.is_number(compressor)
&& (self.operator != "+"
|| self.right.left.is_boolean(compressor)
|| self.right.left.is_number(compressor))) {
|| self.right.left.is_number(compressor))
&& (self.right.left.is_constant_expression()
|| !self.right.right.has_side_effects(compressor))) {
self = make_node(AST_Binary, self, {
operator: align(self.operator, self.right.operator),
left: make_node(AST_Binary, self.left, {

32
test/compress/numbers.js
View File

@@ -1135,3 +1135,35 @@ issue_3655: {
"0",
]
}
issue_3676_1: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var a = [];
console.log(false - (a - (a[1] = 42)));
}
expect: {
var a = [];
console.log(false - (a - (a[1] = 42)));
}
expect_stdout: "NaN"
}
issue_3676_2: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var a;
console.log(false - ((a = []) - (a[1] = 42)));
}
expect: {
var a;
console.log(false - ((a = []) - (a[1] = 42)));
}
expect_stdout: "NaN"
}