Claude error: (HTTP/2 400) messages: text content blocks must contain non-whitespace text

[benthamite]

Please update gptel first -- errors are often fixed by the time they're reported.

• I have updated gptel to the latest commit and tested that the issue still exists

Bug Description

Continuing the discussion here: #442.

This is an instance of the phenomenon I described there as follows:

FWIW, I have also been experiencing this issue (with an up-to-date version of gptel). Strangely, in my case it is fixed by closing the org buffer and reopening the file it was visiting (NB: calling revert-buffer is not enough: the buffer has to be killed.)

Backend

Anthropic

Steps to Reproduce

1. Open the attached Markdown file.
2. Search for <.
3. Delete the text enclosed in < and >.
4. Invoke gptel-send.

It may be hard to reproduce the issue since, as noted, reopening the file fixes it. Hopefully, the other attached files will provide additional hints as to what may be going on. These fils capture the output of a dry run either before or after the fix.

Additional Context

GNU Emacs 30.0.91 (build 1, aarch64-apple-darwin24.0.0, NS appkit-2566.00 Version 15.0.1 (Build 24A348)) of 2024-10
macOS Sequoia

Backtrace

No response

Log Information

No response

Archive.zip
syntax-errors.md

[karthink]

Thanks. The recorded response bounds in syntax-errors.md are wrong though, so I can't use it for testing. Do you have another file I could use?

[gregoryg]

I get this all the time with Claude, never with OpenAI. It's always mystifying, but I'll try to get a reproducible test for you!