To add some info on the database using fossil sqlite:
sqlite> select rid,size,uuid from blob where rid=1864;
1864|36923728|1831419b070d1f09420314feb8971548c1f28a18
sqlite> select length(content) from blob where rid=1864;
14328966
Regards,
Lluís.
On Thu, Mar 10, 2016 at 10:11:06AM +0100, Lluís Batlle i Rossell wrote:
> Hello,
>
> using normally a repository with fossil 1.33 for weeks, it seems that it
> just broke. We can't use the repository anymore, and even "rebuild" fails,
> also with fossil trunk.
>
> We noticed the problem when doing a commit:
>
> """"
> It says ERROR: [projects/file.txt] is 36923728 bytes on disk but 14328966 in
> the repository
>
> NOTICE: Repository version of [projects/file.txt] stored in
> [file-24e13532928c08c6]
>
> working checkout does not match what would have ended up in the repository:
> 4e7e15d6a398903d00bccbdec6137d79 versus 4e5221153df5c4311d874b1a6cf4b991
> """"
>
>
>
> Now, doing a rebuild, it fails at ~20%:
>
> """"
> fossil: ./src/blob.c:206: blob_reset: Assertion
> `(pBlob)->xRealloc==blobReallocMalloc ||
> (pBlob)->xRealloc==blobReallocStatic' failed.
> Aborted
> """"
>
>
>
> With valgrind, it finds an overlapping memcpy() at ~2% of the rebuild:
> With gdb on the valgrind failing point of current trunk, notice:
>
> """"
> (gdb) bt
> #0 blobReallocStatic (pBlob=0x7fffffff6250, newSize=14328967) at
> ./src/blob.c:194
> #1 0x000000000040b3ba in blob_resize (pBlob=0x7fffffff6250,
> newSize=14328966) at ./src/blob.c:422
> #2 0x000000000040b3f6 in blob_materialize (pBlob=0x7fffffff6250) at
> ./src/blob.c:432
> #3 0x00000000004598d0 in manifest_parse (pContent=0x7fffffff6250, rid=1864,
> pErr=0x0)
> at ./src/manifest.c:383
> #4 0x000000000045d337 in manifest_crosslink (rid=1864,
> pContent=0x7fffffff6250, flags=0)
> at ./src/manifest.c:1811
> (gdb) print *pBlob
> $12 = {nUsed = 14328966, nAlloc = 14328966, iCursor = 0, blobFlags = 0, aData
> = 0x1988a98 "\270\026\006\367\377\177", xRealloc = 0x40ab12
> <blobReallocStatic>}
> (gdb) print pNew
> $13 = 0x1988a90 "\220 \225\001"
> """"
>
>
> As you see, the pointer returned by fossil_malloc(14328967) is 8 bytes before
> pBlob->aData. Notice that it is the same "nUsed = 14328966" length as that of
> the file of the commit. That file, in fact, is a txt of 36923728 in length,
> but suspiciously, 14328966 is the exact length of the result of "fossil
> test-compress" it.
>
>
> What may have happened? We don't know of any power outage in this computer
> that
> may have broken the fs. We have been using the repository normally the last
> weeks, doing commits.
>
>
> --
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> PGP key D4831A8A - https://emailselfdefense.fsf.org/
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