Describe the bug

run.zip

One of the regular expressions in the v8-v7 tests doesn't seem to parse correctly

  var re37 = /\s*([+>~\s])\s*([a-zA-Z#.*:\[])/g;

Thrown:
SyntaxError: pcre_compile2("\s*([+>~\s])\s*([a-zA-Z#.*:\(?!))") failed: missing terminating ] for character class at "" in ./a.js:1

• The bug is reproducible with the latest version of njs.
• I minimized the code and NGINX configuration to the smallest
  possible to reproduce the issue.

To reproduce

Steps to reproduce the behavior:

• JS script

  var re37 = /\s*([+>~\s])\s*([a-zA-Z#.*:\[])/g;

Expected behavior

A clear and concise description of what you expected to happen.

Your environment

• Version of njs or specific commit

 ./build/njs -v
0.9.1

• OS: [e.g. Ubuntu 20.04]
  Ubuntu 2504