TAP parser fails with zero width joiner

[TheChilliPL]

Version

v18.12.0

Platform

Microsoft Windows NT 10.0.25375.0 x64

Subsystem

No response

What steps will reproduce the bug?

All you need is to run

assert.deepEqual("👨‍👩‍👧‍👦", "");

inside a test case.

How often does it reproduce? Is there a required condition?

Seems to happen every time there's a ZWJ in the test.

What is the expected behavior? Why is that the expected behavior?

It should not crash the parser, because it doesn't make sense for it to crash the parser. ZWJ should log correctly.

What do you see instead?

Well, it crashes the parser:

  Error [ERR_TAP_LEXER_ERROR]: Unexpected character: ‍ at line 1, column 0
      at Socket.emit (node:events:511:28) {
    code: 'ERR_TAP_LEXER_ERROR'
  }

Additional information

No response

[cjihrig]

The TAP parser was removed in #47867. I think that has only made its way to v20.2.0 and newer so far, but it should be backported eventually.