[Debian-med-packaging] Bug#919778: mash FTBFS on armhf when built on arm64 hardware

[Adrian Bunk]

Source: mash
Version: 2.1-2
Severity: serious
Tags: ftbfs

https://buildd.debian.org/status/fetch.php?pkg=mash&arch=armhf&ver=2.1-2&stamp=1545838322&raw=0

...
   dh_auto_test -a
	make -j8 test VERBOSE=1
make[1]: Entering directory '/<<PKGBUILDDIR>>'
cd test ; ../mash sketch -o genomes.msh genome1.fna genome2.fna genome3.fna
cd test ; ../mash sketch -r -I reads reads1.fastq reads2.fastq -o reads.msh
Sketching genome1.fna...
Sketching genome2.fna...
Sketching genome3.fna...
Bus error
make[1]: *** [Makefile:94: test/reads.msh] Error 135


Backtrace:

#0  0x00638d2e in MurmurHash3_x64_128 (key=0xf523a009, len=len at entry=21, seed=<optimized out>, out=out at entry=0xf6b2dbd4)
    at src/mash/MurmurHash3.cpp:277
#1  0x00635b4c in getHash (seq=<optimized out>, length=length at entry=21, seed=<optimized out>, use64=true)
    at src/mash/hash.cpp:23
#2  0x00639a50 in addMinHashes (minHashHeap=..., 
    seq=0xf523a008 "AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGCTTCTGAACTGGTTACCTGCCGTGAGTAAATTAAAATTTTATTGACTTAGGTCACTAAATACTTTAACCAATATAGGCATAGCGCACAGACAGATAAAAATTACAGAGTACACAACATCCATGAAACGCAT"..., 
    length=<optimized out>, parameters=...) at src/mash/Sketch.cpp:601
#3  0x0063a7d6 in sketchFile (input=0x692268) at src/mash/Sketch.cpp:1264
#4  0x006400a0 in ThreadPool<Sketch::SketchInput, Sketch::SketchOutput>::thread (arg=0xffeea370)
    at src/mash/ThreadPool.hxx:182
#5  0xf6cd2bbe in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0
#6  0xf6bc94dc in ?? () from /lib/arm-linux-gnueabihf/libc.so.6



void MurmurHash3_x64_128 ( const void * key, const int len,
                           const uint32_t seed, void * out )
{
  const uint8_t * data = (const uint8_t*)key;
...
  const uint64_t * blocks = (const uint64_t *)(data);
...


key=0xf523a009 is not properly aligned for that.