Re: Failure to grab a thread with b4

["Konstantin Ryabitsev" <konstantin@linuxfoundation.org>]

On Tue, Jul 07, 2020 at 10:17:24AM +0200, Christian Brauner wrote:
> I've had another crash today. It might be related but I'm posting in
> case it is a separate bug:
> 
> Press any key to continue...
> Looking up https://lore.kernel.org/r/20200706201720.3482959-1-keescook%40chromium.org
> Grabbing thread from lore.kernel.org/linux-api
> Checking for newer revisions on https://lore.kernel.org/linux-api/
> Analyzing 10 messages in the thread
> ---
> Writing ./v6_20200706_keescook_add_seccomp_notifier_ioctl_that_enables_adding_fds.mbx
>   [✓] [PATCH v6 1/7] net/scm: Regularize compat handling of scm_detach_fds()
>     + Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
>   [✗[0m] [PATCH v6 2/7] fs: Move __scm_install_fd() to __receive_fd()
>     + Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
>   [✗[0m] [PATCH v6 3/7] fs: Add receive_fd() wrapper for __receive_fd()
>     + Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
>   [✗[0m] [PATCH v6 4/7] pidfd: Replace open-coded partial receive_fd()
>     + Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
>   [✗[0m] [PATCH v6 5/7] fs: Expand __receive_fd() to accept existing fd
>     + Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
>   [✗[0m] [PATCH v6 6/7] seccomp: Introduce addfd ioctl to seccomp user notifier
> Traceback (most recent call last):
>   File "/home/brauner/.local/bin//b4", line 8, in <module>
>     sys.exit(cmd())
>   File "/home/brauner/.local/lib/python3.8/site-packages/b4/command.py", line 222, in cmd
>     cmdargs.func(cmdargs)
>   File "/home/brauner/.local/lib/python3.8/site-packages/b4/command.py", line 40, in cmd_am
>     b4.mbox.main(cmdargs)
>   File "/home/brauner/.local/lib/python3.8/site-packages/b4/mbox.py", line 494, in main
>     mbox_to_am(threadmbox, cmdargs)
>   File "/home/brauner/.local/lib/python3.8/site-packages/b4/mbox.py", line 110, in mbox_to_am
>     am_mbx = lser.save_am_mbox(mbx, noaddtrailers=cmdargs.noaddtrailers,
>   File "/home/brauner/.local/lib/python3.8/site-packages/b4/__init__.py", line 532, in save_am_mbox
>     failed.remove('commit metadata')
> ValueError: list.remove(x): x not in list

I can't reproduce this one. Can you give me all command-line switches 
you're using with "b4 am"?

-K