Re: perl GraphicsMagick problem

[rudolf <netbsd%eq.cz@localhost>]

Mark Davies wrote:
> Could people please run the following perl script on systems with
> p5-GraphicsMagick installed and tell me what happens.
[...]
>        $error = $impl->Resize(geometry=>'x180');
[...]
> On NetBSD-5.99.59/i386 it SEGFAULTS in the Resize.
>
> If I replace p5-GraphicsMagick with p5-PerlMagick and change the
> "Graphics::Magick"'s to "Image::Magick" I get the same behaviour -
> works on 5.1, segfaults on 5.99.59.
>
> If I use the underlying GraphicsMagick or ImageMagick to convert the
> file it works in all cases so this seems to be an issue with the perl
> interface (in some way that effects both).
>
> Would like to know if anyone sees this problem on 6_BETA2 or a current
> current or on amd64 systems.  If someone understands the perl xs stuff
> and can see why its breaking in this case - that would be great too.

The same problem is with using Ruby instead of Perl. Here is how to 
reproduce it with Ruby on NetBSD 6.0_BETA2, amd64:

1)
install ruby-1.9.3p194nb1 from pkgsrc
install ruby193-RMagick from pkgsrc
2)
run the following ruby script:
#!/usr/pkg/bin/ruby
require 'RMagick'
img = Magick::Image.read('imgsample.png').first
img.resize!(140, 38)

In case you don't have any image around, here is a script, which 
generates a blank png image suitable for step 2):
#!/bin/sh
# sample base64-encoded 330 x 90 PNG image
cat <<PNGEND | openssl enc -base64 -d > imgsample.png
iVBORw0KGgoAAAANSUhEUgAAAUoAAABaCAIAAABR6oh9AAAAAXNSR0IArs4c6QAA
AAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9wF
HQoOBSDFKhEAAADYSURBVHja7dMBDQAACMMwwL/n4+NpJSzZJhmg0UkA9gbsDdgb
sDdgb8DeYG/A3oC9AXsD9gbsDfYG7A3YG7A3YG/A3mBvwN6AvQF7A/YG7A3YG+wN
2BuwN2BvwN6AvcHegL0BewP2BuwN2BvsDdgbsDdgb8DegL0Be4O9AXsD9gbsDdgb
sDfYG7A3YG/A3oC9AXuDvQF7A/YG7A3YG7A32BuwN2BvwN6AvQF7A/YGewP2BuwN
2BuwN2BvsDdgb8DegL0BewP2BnsD9gbsDdgbsDdgb8De0OwBM1kDsWuhsOgAAAAA
SUVORK5CYII=
PNGEND

Backtrace from gdb:
(gdb) bt full
#0  0x00007f7ff64fb1aa in _lwp_kill () from /usr/lib/libc.so.12
No symbol table info available.
#1  0x00007f7ff64faa22 in abort () at /usr/src/lib/libc/stdlib/abort.c:74
        mask = {__bits = {4294967263, 4294967295, 4294967295, 4294967295}}
#2  0x00007f7ff78534b5 in rb_bug () from /usr/pkg/lib/libruby193.so.19
No symbol table info available.
#3  0x00007f7ff78e4eda in sigsegv () from /usr/pkg/lib/libruby193.so.19
No symbol table info available.
#4  <signal handler called>
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.
#6  0x00007f7ff7408771 in pthread__spinlock (lock=0x7f7ff5b0282c "", 
self=0x7f7ff5f36800) at /usr/src/lib/libpthread/pthread_int.h:213
No locals.
#7  pthread__cond_wake_one (cond=0x7f7ff5b02828) at 
/usr/src/lib/libpthread/pthread_cond.c:212
        self = 0x7f7ff5f36800
        signaled = <optimized out>
        mutex = <optimized out>
        lid = <optimized out>
        __func__ = "pthread__cond_wake_one"
#8  0x00007f7ff740604d in sem_post (sem=0x7f7ff5f0cc98) at 
/usr/src/lib/libpthread/sem.c:391
No locals.
#9  0x00007f7fee006c58 in gomp_sem_post (sem=0x7f7ff5f0cc98) at 
/usr/src/external/gpl3/gcc/dist/libgomp/config/posix/sem.h:79
No locals.
#10 gomp_barrier_wait_end (bar=0x7f7ff5f0cc68, state=<optimized out>) at 
/usr/src/external/gpl3/gcc/dist/libgomp/config/posix/bar.c:81
        n = 1
#11 0x00007f7fee00717a in gomp_thread_start (xdata=<optimized out>) at 
/usr/src/external/gpl3/gcc/dist/libgomp/team.c:109
        data = 0x7f7fffffd340
        pool = 0x7f7ff5f0cc50
        local_fn = 0x7f7ff419addc
        local_data = 0x7f7fffffd4c0
#12 0x00007f7ff740a7cd in pthread__create_tramp (cookie=0x7f7fec000000) 
at /usr/src/lib/libpthread/pthread.c:489
        self = 0x7f7fec000000
        retval = 0x7f7ff7ffedc0
#13 0x00007f7ff647bff0 in ___lwp_park50 () from /usr/lib/libc.so.12
No symbol table info available.
(gdb)

r.