Source maps do not map correctly to TypeScript source files

[jimmycuadra]

• Version: 2.0.5
• Rollup Version: 2.66.1
• Operating System and version (if applicable): macOS 11.6.2
• Node Version (if applicable): 17.3.0
• Does it work with tsc (if applicable): N/A?

Reproduction

1. Check out shellwords at commit e1be4b2.
2. Run yarn install.
3. Run yarn browser.
4. Open http://localhost:3000/ in a browser.
5. Open the developer console and execute the following code: shellwords.split(["text"]).
6. Note the stack trace shown in the error (first screenshot below).
7. Open the browser's debugger and look at the source. Note that the lines shown in the stack trace do not correspond to the source code on those lines in the source (second and third screenshots below). This is most easily observed in the third screenshot. The error "string.match" is triggered on line 9, but the stack trace lists line 20, which is a blank line.

Expected Behavior

The line numbers in stack traces should correspond to the correct lines in the TypeScript source code.

Actual Behavior

The line numbers in the stack traces point to different lines in the TypeScript source code.

Screenshots

Stack trace:

Source code showing line 4, which is reported in the stack trace:

Source code showing line 20, which is reported in the stack trace: