[BUG/TypeScript] declare global conflict with block declaration #13112
Closed
Description
Bug Report
- I would like to work on a fix!
Current behavior
Code
declare global { namespace globalThis { var i18n: any; } }
export class i18n {}trigger an scope error:
TypeError: Duplicate declaration "i18n"
1 | declare global { namespace globalThis { var i18n: any; } }
2 |
> 3 | export class i18n {}
| ^^^^
249 | }
250 |
> 251 | return new Error(msg);
| ^
252 | }
253 |
254 | }
at File.buildCodeFrameError (packages/babel-core/lib/transformation/file/file.js:251:12)
at Scope.checkBlockScopedCollisions (packages/babel-traverse/lib/scope/index.js:422:22)
at Scope.registerBinding (packages/babel-traverse/lib/scope/index.js:582:16)
at Scope.registerDeclaration (packages/babel-traverse/lib/scope/index.js:527:12)
at Object.BlockScoped (packages/babel-traverse/lib/scope/index.js:250:12)
at Object.newFn (packages/babel-traverse/lib/visitors.js:216:17)
at NodePath._call (packages/babel-traverse/lib/path/context.js:55:20)
at NodePath.call (packages/babel-traverse/lib/path/context.js:38:14)
at NodePath.visit (packages/babel-traverse/lib/path/context.js:90:31)
at TraversalContext.visitQueue (packages/babel-traverse/lib/context.js:116:16)Input Code
As described above.
Expected behavior
This piece of code is valid in TypeScript.
Babel Configuration (babel.config.js, .babelrc, package.json#babel, cli command, .eslintrc)
- Filename:
babel.config.js
{
"presets": ["@babel/preset-typescript"]
}Environment
- Babel version(s): [e.g. v7.12.0]
- Node/npm version: [e.g. Node 12/npm 7]
- OS: [e.g. macOS 10.15.4, Windows 10]
- Monorepo: [e.g. yes/no/Lerna]
- How you are using Babel: [e.g.
webpack,rollup,parcel,babel-register]
Possible Solution
Additional context