Help screen errors

[ItsJamie9494]

When running cat --help, I get a Node.js error.

This error appears on all cash programs, and seems to be related to the parser.

Error:

(node:13969) UnhandledPromiseRejectionWarning: undefined
(node:13969) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:13969) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[nfischer]

What version of node are you using? Which OS are you on?

[ItsJamie9494]

I'm on Linux, using Node v13.6.0

[nfischer]

I can repro with the same config:

$ nvm use --delete-prefix v13.6.0

$ npm install -g cash-cat

$ which -a cat
[PATH REDACTED]/.nvm/versions/node/v13.6.0/bin/cat
/bin/cat

$ [PATH REDACTED]/.nvm/versions/node/v13.6.0/bin/cat --help
Usage: cat [OPTION]... [FILE]...
Concatenate FILE(s), or standard input, to standard output.

  -A, --show-all           equivalent to -vET
  -b, --number-nonblank    number nonempty output lines, overrides -n
  -e                       equivalent to -vE
  -E, --show-ends          display $ at end of each line
  -n, --number             number all output lines
  -s, --squeeze-blank      suppress repeated empty output lines
  -t                       equivalent to -vT
  -T, --show-tabs          display TAB characters as ^I
  -v, --show-nonprinting   use ^ and M- notation, except for LFD and TAB
      --help               display this help and exit

With no FILE, or when FILE is -, read standard input.

Examples:
  cat f - g  Output f's contents, then standard input, then g's contents.
  cat        Copy standard input to standard output.

Report cat bugs to <https://github.com/dthree/cash>
Cash home page: <https://cash.js.org/>
(node:24024) UnhandledPromiseRejectionWarning: undefined
(node:24024) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:24024) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I can only repro with the standalone executables (ex. cash-cat), not the interpreter (ex. cash).

[ItsJamie9494]

Yes, it only affects the standalone executables.