bug#19512: Failed substitution yields incomplete store item

[David Thompson]

While working on 'guix publish', I managed to mess up the store.  :(

Here's the first substitution that failed due to an invalid eof marker
for some reason:

  address@hidden ~$ sudo 
_NIX_OPTIONS="substitute-urls=http://192.168.1.157:8080"; guix substitute-binary 
--substitute 
/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0 
/tmp/guile-toxcore
  
  found valid signature for 
'/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0', from 
'http://192.168.1.157:8080/nar/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0'
  sha256:xl35awxl6kgl5b2eum7kfgqlnap7a7itczpyxptf4kq25pasafka
  downloading 
`/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0' (0.1 
MiB installed)...
  
http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0
     100.0% of 127.5 KiBguix substitute-binary: error: invalid nar end-of-file 
marker


When the same command is run again, there's a new error:

  address@hidden ~$ sudo 
_NIX_OPTIONS="substitute-urls=http://192.168.1.157:8080"; guix substitute-binary 
--substitute 
/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0 
/tmp/guile-toxcore
  
  found valid signature for 
'/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0', from 
'http://192.168.1.157:8080/nar/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0'
  sha256:xl35awxl6kgl5b2eum7kfgqlnap7a7itczpyxptf4kq25pasafka
  downloading 
`/gnu/store/iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0' (0.1 
MiB installed)...
  
http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0
       6.3% of 127.5 KiBguix substitute-binary: error: mkdir: File exists

Any idea what could be going wrong?

-- 
David Thompson
Web Developer - Free Software Foundation - http://fsf.org
GPG Key: 0FF1D807
Support the FSF: https://fsf.org/donate