Describe the bug
When debugging ts files with source maps, named imported variables are not previewed properly.

To Reproduce
Steps to reproduce the behavior:

1. git clone https://github.com/liuxingbaoyu/jsdebug-sourcemap-bug
2. yarn / npm i
3. set breakpoint at src\util\scope.ts L18
4. start debugging Launch Program
5. preview BIND_SCOPE_LEXICAL
6. see error

**VS Code Version: 1.71.0 (user setup)

Additional context