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bun-shebang-crlf-bug's Introduction

Demonstration of bug in Bun's shebang parser on files with CRLF line endings accessed through a symbolic link.

To reproduce:

  1. Clone this repo
  2. cd bun-shebang-crlf-bug
  3. bun link to register the package
  4. bun link bun-shebang-crlf-bug to create symlinks in ./node_modules
  5. bunx buncrlfbug or bunx --bun buncrlfbug

Result:

/usr/bin/env: ‘node\r’: No such file or directory
error: "buncrlfbug" exited with code 127

This is a minimal reproduction of the same problem when running, for example:

bunx jscodeshift ...

because jscodeshift ships with CRLF files. Converting the files to LF avoids the problem.

The CRLF issue does not seem to be a problem when symlinks are not involved.

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