JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix corner case in dead_code (#4373)

Browse Source 
fixes #4372
This commit is contained in:
Alex Lam S.L
2020-12-12 18:24:18 +00:00
committed by GitHub
parent 8c000033d3
commit af97629912
2 changed files with 48 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
lib/compress.js
View File

@@ -9293,12 +9293,16 @@ merge(Compressor.prototype, {
node = parent;
parent = compressor.parent(level++);
if (parent instanceof AST_Assign) {
if (parent.left instanceof AST_PropAccess) break;
if (!(parent.left instanceof AST_SymbolRef)) continue;
if (parent.left.definition() !== def) continue;
if (in_try(level, parent)) break;
var found = false;
if (parent.left.match_symbol(function(node) {
if (node instanceof AST_PropAccess) return true;
if (!found && node instanceof AST_SymbolRef && node.definition() === def) {
if (in_try(level, parent)) return true;
def.fixed = false;
return strip_assignment();
found = true;
}
})) break;
if (found) return strip_assignment();
} else if (parent instanceof AST_Exit) {
if (!local) break;
if (in_try(level, parent)) break;

38
test/compress/destructured.js
View File

@@ -1806,3 +1806,41 @@ issue_4355: {
expect_stdout: "2"
node_version: ">=6"
}
issue_4372_1: {
options = {
dead_code: true,
}
input: {
var a = "FAIL";
a += {
[console.log(a)]: a,
} = a = "PASS";
}
expect: {
var a = "FAIL";
a += {
[console.log(a)]: a,
} = a = "PASS";
}
expect_stdout: "PASS"
node_version: ">=6"
}
issue_4372_2: {
options = {
dead_code: true,
}
input: {
var a;
[ a ] = a = [ "PASS", "FAIL" ];
console.log(a);
}
expect: {
var a;
[ a ] = [ "PASS", "FAIL" ];
console.log(a);
}
expect_stdout: "PASS"
node_version: ">=6"
}