minify-mangle-names fail when default parameters are assigned to a variable #1023
Description
Describe the bug
mangling names don't work when there is a default parameter with a value referencing another variable like this:
var abc = 123;
function lmno(abcdefg = abc) {}This causes issues when trying to minify with mangling as described in this still open issue opened two years ago: #974
To Reproduce
Minimal code to reproduce the bug
const babel = require('@babel/core');
console.log(babel.transformSync(`
var uhoh = 'oops';
function test(first, second = '123', third = uhoh) {}
(function() {
var uhoh1 = 'oops1';
function test1(first1, second1 = '123', third1 = uhoh1) {}
})()
`, {
plugins: ['minify-mangle-names'],
}).code);Expected Output
var uhoh = 'oops';
function test(a, b = '123', c = uhoh) {}
(function () {
var d = 'oops1';
function b(a, b = '123', c = d) {}
})();Stack Trace
/home/coder/project/fix-babel/node_modules/@babel/core/lib/transformation/index.js:45
throw e;
^
TypeError: unknown: Cannot read properties of undefined (reading 'add')
at ScopeTracker.addReference (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/scope-tracker.js:47:34)
at ReferencedIdentifier (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/index.js:196:26)
at newFn (/home/coder/project/fix-babel/node_modules/@babel/traverse/lib/visitors.js:218:17)
at bfsTraverse (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/bfs-traverse.js:32:43)
at Mangler.collect (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/index.js:229:7)
at Mangler.run (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/index.js:54:12)
at PluginPass.exit (/home/coder/project/fix-babel/node_modules/babel-plugin-minify-mangle-names/lib/index.js:558:19)
at newFn (/home/coder/project/fix-babel/node_modules/@babel/traverse/lib/visitors.js:177:21)
at NodePath._call (/home/coder/project/fix-babel/node_modules/@babel/traverse/lib/path/context.js:53:20)
at NodePath.call (/home/coder/project/fix-babel/node_modules/@babel/traverse/lib/path/context.js:40:17) {
code: 'BABEL_TRANSFORM_ERROR'
}
Configuration
package.json:
"@babel/core": "^7.17.7",
"babel-plugin-minify-mangle-names": "^0.5.0"babel-minify-config: There is none
babelrc: There is none