If it is just the `world` regression tests that are failing, then it is almost certainly due to save/restore world being incompatible with ASLR; see http://mlton.org/MLtonWorld#_notes. Perhaps Debian arm64-linux has gained ASLR since the last time the regression suite was run on this platform? In any case, you'll notice that the `world` regression tests are explicitly whitelisted (i.e., these tests failing do not cause a failure exit status from the regression script) because of this issue.
On Sat, Dec 29, 2018 at 12:57 PM Steve McIntyre <st...@einval.com> wrote: > > Package: src:mlton > Version: 20180207-1 > Severity: serious > Justification: fails to build from source (but built successfully in the past) > > Hi! > > I've been doing a full rebuild of the Debian archive, building all > source packages targeting armel and armhf using arm64 hardware. We are > planning in future to move all of our 32-bit armel/armhf builds to > using arm64 machines, so this rebuild is to identify packages that > might have problems with this configuration. > > I found that mlton is failing with segfaults in its test suite. > Looking further, I can see that the same problem is showing up on our > buildds for at least arm64 and armel too. I was going to try and debug > the problem: > > ... > testing world6 > 1,4c1 > < ./world6 > < a > < b > < c > --- > > Segmentation fault (core dumped) > ... > > (sid-armel)steve@mjolnir:~/debian/build/mlton/mlton-20180207$ find . -name > core > ./regression/core > (sid-armel)steve@mjolnir:~/debian/build/mlton/mlton-20180207$ file > regression/core > regression/core: ELF 32-bit LSB core file, ARM, version 1 (SYSV), SVR4-style, > from './world6 @MLton load-world /tmp/worldW1WpTw -- a b c', real uid: 1000, > effective uid: 1000, real gid: 1000, effective gid: 1000, execfn: './world6', > platform: 'v8l' > > But it appears that the test suite helpfully carries on after crashes > and even deletes the binaries it's made: > > (sid-armel)steve@mjolnir:~/debian/build/mlton/mlton-20180207$ find . -name > world6 > (sid-armel)steve@mjolnir:~/debian/build/mlton/mlton-20180207$ > > So I'm stopping here. > > -- System Information: > Debian Release: 9.6 > APT prefers stable-updates > APT policy: (500, 'stable-updates'), (500, 'stable-debug'), (500, 'stable') > Architecture: amd64 (x86_64) > Foreign Architectures: i386 > > Kernel: Linux 4.9.0-8-amd64 (SMP w/4 CPU cores) > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), > LANGUAGE=en_GB.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) >
