Re: Invalid nar signature

[David Thompson <dthompson2@worcester.edu>]

Back at this again after awhile.

Ludovic Courtès <ludo@gnu.org> writes:

> Hmm, some ideas of things to try:
>
>   1. Add (force-output port) after (write-file ...).

No effect.

>   2. Display the value of ‘x’ in ‘restore-file’ at the point where the
>      exception is raised.

Haven't tried this yet.

>   2. strace the substituter and/or ‘guix publish’ to see exactly what
>      happens on the wire.  Is the end-of-file marker string sent?  Is it
>      received?  etc.

Here's a snippet of the strace output:

  http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0	 94.1% of 127.5 KiB) = 104
  read(10, "vector tox-max-status-message-le"..., 7728) = 117
  read(10, "                                "..., 7611) = 1448
  read(10, "t-last-online (unwrap-tox tox) f"..., 6163) = 1448
  read(10, "tox tox) nospam))\n\n(define/unwra"..., 4715) = 1448
  read(10, " friend-number group-number)))\n\n"..., 3267) = 1448
  read(10, ")))\n    (if (negative? result)\n "..., 1819) = 1819
  http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0	100.0% of 127.5 KiB) = 104
  http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0	100.0% of 127.5 KiB) = 104
  brk(0x41875000)                         = 0x41875000
  mmap(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d2aaaf000
  mremap(0x7f3d2aaaf000, 135168, 266240, MREMAP_MAYMOVE) = 0x7f3d2aa6e000
  mremap(0x7f3d2aa6e000, 266240, 528384, MREMAP_MAYMOVE) = 0x7f3d2a9ed000
  mremap(0x7f3d2a9ed000, 528384, 430080, MREMAP_MAYMOVE) = 0x7f3d2a9ed000
  munmap(0x7f3d2a9ed000, 430080)          = 0
  http://192.168.1.157/.../iw3jn6a1avv78pp5v2cv42vyh0d8zi0g-guile-toxcore-0.1-6a9fbe0	100.0% of 127.5 KiB) = 104
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en_US.UTF-8/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en_US.utf8/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en_US/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en.UTF-8/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en.utf8/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/gnu/store/72qm7kc9phvsiw6j7xgn1ii0f6s9mx8i-guix-0.8.3b09332/share/locale/en/LC_MESSAGES/guix.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  write(2, "guix substitute-binary: error: i"..., 62guix substitute-binary: error: invalid nar end-of-file marker
  ) = 62
  exit_group(1)                           = ?
  +++ exited with 1 +++

I'm not sure what's going on here.  I thought that maybe the substituter
was getting tripped up by the Scheme code in the uncompressed nar, but
I don't have any reason to believe that's true.

Despite that, I tried to compress the nar with bzip2 just for fun, but I
ran into another problem:

  warning: call to primitive-fork while multiple threads are running;
           further behavior unspecified.  See "Processes" in the
           manual, for more information.

I'm running a REPL server in addition to the web server, but I imagine
the web server also spawns additional threads to handle requests, so
either way 'filtered-output-port' won't work here.

The return value of 'waitpid' for the bzip2 pid is:

  ((18764 . 256))

Thoughts on what to try next?  I feel like I'm so close, but I keep
running into walls that prevent me from making much progress.

-- 
David Thompson
Web Developer - Free Software Foundation - http://fsf.org
GPG Key: 0FF1D807
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