Fwd: Building math/octave with QT4?

Montgomery-Smith, Stephen stephen at missouri.edu
Tue Jun 19 21:05:39 UTC 2018

Dear Gleb,

I am the maintainer of the math/octave port.  The following error was 
reported to me, which seems to be related to the devel/qt5-core port. 
Do you think it is likely that this problem is fixed by r472242 and 
r472262 which you committed recently?  I'm still using qt5-core-5.9.4_2, 
and I am unable to reproduce the error.

If you are unable to answer, I'll go ahead and rebuild my ports to see 
what is going on.  But my life is very busy right now, so I would rather 
wait until you give me an answer.

Thanks, Stephen

-------- Forwarded Message --------
Subject: Building math/octave with QT4?
Date: Tue, 12 Jun 2018 13:19:27 -0700
From: Steve Kargl <sgk at troutmask.apl.washington.edu>
Reply-To: sgk at troutmask.apl.washington.edu
To: freebsd-ports at freebsd.org

Is it possible to build math/octave with QT4?
The recent switch to require QT5 in r469260
leads to an unusable octave (unless one's
intention is to debug QT5).

% gdb81 
> bt
#0  0x00000002056b244d in QVariant::QVariant(QVariant const&) ()
    from /usr/local/lib/qt5/libQt5Core.so.5
[Current thread is 1 (LWP 101275)]
(gdb) bt
#0  0x00000002056b244d in QVariant::QVariant(QVariant const&) ()
    from /usr/local/lib/qt5/libQt5Core.so.5
#1  0x0000000227c233c9 in ?? ()
    from /usr/local/lib/qt5/plugins/sqldrivers/libqsqlite.so
#2  0x0000000227c1eba2 in ?? ()
    from /usr/local/lib/qt5/plugins/sqldrivers/libqsqlite.so
#3  0x0000000205117351 in QSqlResult::execBatch(bool) ()
    from /usr/local/lib/qt5/libQt5Sql.so.5
#4  0x0000000203cf9ca2 in ?? () from /usr/local/lib/qt5/libQt5Help.so.5
#5  0x0000000203cfbd42 in ?? () from /usr/local/lib/qt5/libQt5Help.so.5
#6  0x00000002054b24ea in ?? () from /usr/local/lib/qt5/libQt5Core.so.5
#7  0x0000000200d7e426 in thread_start (curthread=0x232679100)
     at /usr/src/lib/libthr/thread/thr_create.c:291
#8  0x0000000000000000 in ?? ()
Backtrace stopped: Cannot access memory at address 0x7fffbebf4000

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