[cocci] spatch --use-patch-diff broken?

[Jakub Kicinski <kuba@kernel.org>]

Hi!

I've been trying to run coccicheck with --use-patch-diff
to try to limit the number of processed files. I _think_
it worked when I set it up early last month but recently
I went back to check and make coccicheck stops after
the first spatch call, all it prints is "hd"

https://netdev-3.bots.linux.dev/cocci/results/452585/new

spatch seems to work fine when run without --use-patch-diff
cocci version is the latest from git as of $now

FWIW the git hashes are from this tree:
https://github.com/linux-netdev/testing.git
(probably best to clone that thing with --depth $number)


Example:

/usr/local/bin/spatch -D report --no-show-diff --very-quiet --cocci-file ./scripts/coccinelle/api/err_cast.cocci --no-includes --include-headers --dir . -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi --include ./include/linux/compiler-version.h --include ./include/linux/kconfig.h --jobs 48 --chunksize 1 --use-patch-diff b9f2444cd114a7f9c44950dc850aa1753b3edd94..be5bf59888403413619dd74e0d5f5386ffafbc90
grep: warning: + at start of expression
grep: warning: + at start of expression
grep: warning: + at start of expression
hd