Confusing error message in presence of backslashes in url

[kit-ty-kate]

I did this

A bug in the code i'm working on transformed / in \ in urls before passing it to curl. However the error message displayed by curl was rather perplexing and didn't help to debug the root issue properly

$ curl 'http://localhost:1111\test'
curl: (3) URL rejected: Port number was not a decimal number between 0 and 65535
$ curl 'http:\\localhost:1111'
curl: (3) URL rejected: Port number was not a decimal number between 0 and 65535
$ curl 'http:\\localhost'
curl: (3) URL rejected: Port number was not a decimal number between 0 and 65535

I expected the following

I think it would help to at least display what was parsed as a number

curl/libcurl version

curl 8.18.0

operating system

Tested on both Linux and Windows

[ivamly]

Hello! I'd like to take this one if the approach is approved.

[bagder]

Hello! I'd like to take this one if the approach is approved.

I'm not sure what approach that is, but you're certainly welcome to attempt to improve this if you think you have a take.

[ivamly]

By "approach" I meant modifying the error reporting to show the invalid token, like:
Port number was not a decimal number between 0 and 65535, but got: '...'

[bagder]

It depends on how that is done! If it is done clean and nicely, then sure.