Patch that should apply cleanly doesn't using gbp pq import

Hi All,

I'm proceeding with my learning process of packaging a new upstream
version of python-lsp-server and a question came up:

Question A: What to do when gbp pq import/rebase fails applying a patch
that should apply cleanly? Can I just apply the patch using other means
(patch or git apply -3) and move on?

Question B: And if a patch requires tweaking to apply, what is the
recommended procedure?

More details about Question A:

The following steps were executed on debian/testing (forky), git
version is 2.51.0 and everything I did was:

1. Checkout the repo

debcheckout -a python-lsp-server
cd python-lsp-server

2. Make sure we have the branches locally, or gbp import-orig will
complain

git checkout pristine-tar
git checkout upstream
git checkout debian/master 

3. Get the new upstream version (v1.13.2)

gbp import-orig --pristine-tar --uscan

4. Rebase / import 

gbp pq rebase

The step 4 fail to applying debian/patches/0002-Increase-test-
timeout.patch, which applies cleanly using either:

patch -p1 < debian/patches/0002-Increase-test-timeout.patch

or

git apply -3 debian/patches/0002-Increase-test-timeout.patch

I've checked the sources of gbp and what it does to apply the patch is:

git apply --index --whitespace=fix debian/patches/0002-Increase-test-
timeout.patch

Which in my view should apply the patch cleanly, but I can't explain
why it doesn't.

Does anyone has any clue?


Thanks,
Aeliton