[Debian-med-packaging] Bug#982692: Bug#982692: gemma: FTBFS: dh_auto_test: error: make -j1 check returned exit code 2

[Étienne Mollier]

Hi Lucas,

I couldn't reproduce the issue in gemma neither on mostly clean
chroot running on my native hardware.

Lucas Nussbaum, on 2021-02-13 18:12:12 +0100:
> The full build log is available from:
>    http://qa-logs.debian.net/2021/02/13/gemma_0.98.4+dfsg-1_unstable.log
[...]
> 
> If you fail to reproduce this, please provide a build log and diff it with me
> so that we can identify if something relevant changed in the meantime.

You will find a diff in attachment.  I see error accumulation in
test results, some orders of magnitude in some cases.  The only
two meaningful difference I could find is the kernel version,
and the fact that things are running on either regular or
virtualised environment, after reducing possible sources of
inconsistencies.  (I had some remains of perl 5.30 and libisl22
in my old chroot initially, but making sure they were gone
didn't bring much changes.)

Note I truncated the end of the diff after the failure for the
sake of brevity; let me know if that was a mistake.

> About the archive rebuild: The rebuild was done on EC2 VM instances from
> Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
> failed build was retried once to eliminate random failures.

GSL is involved.  Maybe a next step would be to try on a virtual
machine.  What are the CPU flags on EC2 VM instances usually ?

Here is my cpu at t time for reference:

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   43 bits physical, 48 bits virtual
CPU(s):                          6
On-line CPU(s) list:             0-5
Thread(s) per core:              1
Core(s) per socket:              6
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       AuthenticAMD
CPU family:                      23
Model:                           113
Model name:                      AMD Ryzen 5 3600 6-Core Processor
Stepping:                        0
Frequency boost:                 enabled
CPU MHz:                         3853.218
CPU max MHz:                     3600.0000
CPU min MHz:                     2200.0000
BogoMIPS:                        7185.83
Virtualization:                  AMD-V
L1d cache:                       192 KiB
L1i cache:                       192 KiB
L2 cache:                        3 MiB
L3 cache:                        32 MiB
NUMA node0 CPU(s):               0-5
Vulnerability Itlb multihit:     Not affected
Vulnerability L1tf:              Not affected
Vulnerability Mds:               Not affected
Vulnerability Meltdown:          Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full AMD retpoline, IBPB conditional, STIBP disabled, RSB filling
Vulnerability Srbds:             Not affected
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce
cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse
sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm
constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid
aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2
movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm
extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs
skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc
mwaitx cpb cat_l3 cdp_l3 hw_pstate sme ssbd mba sev ibpb stibp
vmmcall sev_es fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx
smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves
cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf
xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save
tsc_scale vmcb_clean flushbyasid decodeassists pausefilter
pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov
succor smca

Kind Regards,
-- 
Étienne Mollier <etienne.mollier at mailoo.org>
Fingerprint:  8f91 b227 c7d6 f2b1 948c  8236 793c f67e 8f0d 11da
Sent from /dev/pts/2, please excuse my verbosity.
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