BTW src:opensp a Cxx file in includes really?
This is on version 1.5.2 for ages no upstream changes.


It is possible that depeding on the optimization of openjade on build it 
changes the code flow into ::erase and then triggers the bad behavior.

replaced the broken line with:
  for (const T *p = p1; p <= p2; p++)

Rebuilt openjade against that fixed version but that thought was too
easy. It will still try to access p1=0x1 and fault. I'll need to
understand where exactly those p1/p2 args come from and fix it there.

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https://bugs.launchpad.net/bugs/1869734

Title:
  openjade segfaults on arm (due to gcc optimization)

Status in openjade package in Ubuntu:
  Triaged

Bug description:
  <Myon>        cpaelzer: fun, openjade segfaulting on focal/arm64
  <cpaelzer>    I beg your pardon for my ignorance of the ecosystem, but how is 
this related to postgresql-apt
  <cpaelzer>    for doc generation?
  <Myon>        cpaelzer: the postgresql-9.5 and -9.6 builds fail during doc 
generation on focal/arm64
  <Myon>        everything else (other archs, other dists) is fine
  <Myon>        
https://pgdgbuild.dus.dg-i.net/job/postgresql-9.5-binaries/architecture=arm64,distribution=focal/55/console

  <cpaelzer>    Myon: only on arm64?
  <Myon>        only there, yes

  <Myon>        ./configure && make -C doc/src/sgml all  should reproduce it
  <cpaelzer>    clone and build this branch ? 
https://github.com/postgres/postgres/tree/REL9_5_STABLE
  <Myon>        the crash is in /usr/lib/libostyle.so.1 from libostyle1c2
  <cpaelzer>    here it is
  <cpaelzer>    segfault

  <Myon>        I have this now http://paste.debian.net/1136839/
  <cpaelzer>    https://paste.ubuntu.com/p/CfzrfWkqzs/

  <cpaelzer>    well I wanted to get -O0 to see more int he debugger
  <cpaelzer>    my build worked as well now
  <Myon>        the -O0 openjade installed doesn't segfault
  <cpaelzer>    oh so like my -O0 then
  <cpaelzer>    so maybe we should just always -O0 openjade then?
  <cpaelzer>    TBH who cares about optimization in that
  <cpaelzer>    But its usage is mostly build time and not runtime
  <Myon>        maybe -O0 on arm64 only
  <cpaelzer>    I'm rebulding -O2 again to recheck if that really is it
  <cpaelzer>    and then -O1 to check the in between
  <cpaelzer>    it might "just" need a rebuild

  <cpaelzer>    -O2 re-build segfault
  <cpaelzer>    -O1 (for completeness) rebuild ... seems to hang?
  <Myon>        probably not really relevant
  <cpaelzer>    agreed, but I want to rebuild -O0 again just to see it builds 
and then works
  <cpaelzer>    -O0 on arm64 really seems to be a good choice

  <Myon>        I can try if rebuilding makes it fail on sid
  <Myon>        cpaelzer: recompiling openjade in arm64/sid doesn't make it 
segfault
  <Myon>        so it seems this needs a focal-only fix
  <Myon>        cpaelzer: the openjade segfault is also present in pgpool2, so 
not just in ancient PostgreSQL :(

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