Package: ncbi-blast+
Version: 2.16.0+ds-6
Severity: normal

Dear Maintainer,

While working on #1079439, a test failure in python-biopython
that appeared only on riscv64 turns out to be symptomatic of the
following issue:

        $ makeblastdb -dbtype nucl -in GenBank/NC_005816.fna -parse_seqids 
-hash_index -max_file_sz 20MB -taxid 10
        
        
        Building a new DB, current time: 09/04/2024 20:41:00
        New DB name:   
/build/python-biopython-1.83+dfsg1/Tests/GenBank/NC_005816.fna
        New DB title:  GenBank/NC_005816.fna
        Sequence type: Nucleotide
        Keep MBits: T
        Maximum file size: 20000000B
        Adding sequences from FASTA; added 1 sequences in 1.68889 seconds.
        
        No volumes were created.
        
        BLAST Database creation error: LMDB runtime error: mdb_env_open: 
Operation not supported

Falling back to blastdb version 4 works around the issue:

        # makeblastdb  -blastdb_version 4 -dbtype nucl -in 
GenBank/NC_005816.fna -parse_seqids -hash_index -max_file_sz 20MB -taxid 10
        
        
        Building a new DB, current time: 09/04/2024 20:43:59
        New DB name:   
/build/python-biopython-1.83+dfsg1/Tests/GenBank/NC_005816.fna
        New DB title:  GenBank/NC_005816.fna
        Sequence type: Nucleotide
        Deleted existing Nucleotide BLAST database named 
/build/python-biopython-1.83+dfsg1/Tests/GenBank/NC_005816.fna
        Keep MBits: T
        Maximum file size: 20000000B
        Adding sequences from FASTA; added 1 sequences in 1.52792 seconds.

As far as I can witness this is machine specific (not accounting
for similar looking symptoms with s390x, although the big endian
factor was not innocent in the matter; we're speaking little
endian in this case):

        $ uname -m 
        riscv64

I plan to skip test_NCBI_BLAST_tools.py in python-biopython in
the meantime: this package is not subject to serious bug or
autoremoval whatsoever, but in its current state it hogs debci
riscv64 runners due to another problem.

Have a nice day,  :)
-- 
  .''`.  Étienne Mollier <emoll...@debian.org>
 : :' :  pgp: 8f91 b227 c7d6 f2b1 948c  8236 793c f67e 8f0d 11da
 `. `'   sent from /dev/pts/1, please excuse my verbosity
   `-    on air: Alan Parsons Project - Games People Play

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