b4 diff -m: max() arg is an empty sequence

b4 diff -m: max() arg is an empty sequence

[Krzysztof Kozlowski]

Hi,

$ b4 mbox '1600234622-8815-2-git-send-email-yilun.xu@intel.com'
$ b4 mbox '1599553645-26928-1-git-send-email-yilun.xu@intel.com'

(the second mbox is actually a cover letter as b4 could not download the
actual patch directly via its Message-Id)

$ b4 diff -m 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx 1600234622-8815-2-git-send-email-yilun.xu@intel.com.mbx

Loading 8 messages from 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx
Traceback (most recent call last):
  File "/home/kozik/.local/bin/b4", line 11, in <module>
    sys.exit(cmd())
  File "/home/kozik/.local/lib/python3.6/site-packages/b4/command.py", line 222, in cmd
    cmdargs.func(cmdargs)
  File "/home/kozik/.local/lib/python3.6/site-packages/b4/command.py", line 65, in cmd_diff
    b4.diff.main(cmdargs)
  File "/home/kozik/.local/lib/python3.6/site-packages/b4/diff.py", line 115, in main
    lser, user = diff_mboxes(cmdargs)
  File "/home/kozik/.local/lib/python3.6/site-packages/b4/diff.py", line 108, in diff_mboxes
    chunks.append(lmbx.series[max(lmbx.series.keys())])
ValueError: max() arg is an empty sequence


Ubuntu 18.04.5
Python 3.6.9
b4 0.5.2

Best regards,
Krzysztof

Re: [tools] b4 diff -m: max() arg is an empty sequence

[Konstantin Ryabitsev]

On Sun, Sep 20, 2020 at 06:31:17PM +0200, Krzysztof Kozlowski wrote:
> Hi,
> 
> $ b4 mbox '1600234622-8815-2-git-send-email-yilun.xu@intel.com'
> $ b4 mbox '1599553645-26928-1-git-send-email-yilun.xu@intel.com'
> 
> (the second mbox is actually a cover letter as b4 could not download the
> actual patch directly via its Message-Id)
> 
> $ b4 diff -m 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx 1600234622-8815-2-git-send-email-yilun.xu@intel.com.mbx
> 
> Loading 8 messages from 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx
> Traceback (most recent call last):
>   File "/home/kozik/.local/bin/b4", line 11, in <module>
>     sys.exit(cmd())
>   File "/home/kozik/.local/lib/python3.6/site-packages/b4/command.py", line 222, in cmd
>     cmdargs.func(cmdargs)
>   File "/home/kozik/.local/lib/python3.6/site-packages/b4/command.py", line 65, in cmd_diff
>     b4.diff.main(cmdargs)
>   File "/home/kozik/.local/lib/python3.6/site-packages/b4/diff.py", line 115, in main
>     lser, user = diff_mboxes(cmdargs)
>   File "/home/kozik/.local/lib/python3.6/site-packages/b4/diff.py", line 108, in diff_mboxes
>     chunks.append(lmbx.series[max(lmbx.series.keys())])
> ValueError: max() arg is an empty sequence

Thanks, this crasher is now fixed in master and stable-0.5.y:

$ b4 diff -m 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx 1600234622-8815-2-git-send-email-yilun.xu@intel.com.mbx
Loading 8 messages from 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx
No valid patches found in 1599553645-26928-1-git-send-email-yilun.xu@intel.com.mbx


-K