517588 2026-03-15 00:24:16 +0000 Cut and paste crash, jas_init_library: Assertion `!jas_global.initialized' failed 2026-03-16 12:30:10 +0000 1 1 2 Applications digikam Plugin-DImg-JP2K 9.0.0 Other Linux RESOLVED FIXED NOR crash --- 0 gilbertd+kde digikam-bugs-null metzpinguin nucleo https://invent.kde.org/graphics/digikam/-/commit/9dd5e992b71b6a855fc419114344d4bd181bc08f 9.1.0 0 oldest_to_newest 2503392 0 gilbertd+kde 2026-03-15 00:24:16 +0000 SUMMARY I've got a repeatable crash on Fedora 44Beta's Digikam 9.0.0 and was asked to upstream the bug. It looks like Digikam is calling jas_init_library(..) in the jasper jpeg library, twice, (Sometimes the paste will work and then digikam will crash rather than it crashing first) Originally filed as https://bugzilla.redhat.com/show_bug.cgi?id=2447616 STEPS TO REPRODUCE 1. Open an image in the image editor 2. Open an external program - e.g. gimp that can accept a paste 3. Select an area of the image in digikam and 'copy' to the clipboard 4. In gimp select file->Create->From clipboard (Sometimes it fails between 3 and 4) OBSERVED RESULT digikam: /builddir/build/BUILD/jasper-4.2.8-build/jasper-version-4.2.8/src/libjasper/base/jas_init.c:505: jas_init_library: Assertion `!jas_global.initialized' failed. EXPECTED RESULT A happy paste SOFTWARE/OS VERSIONS digiKam: 9.0.0 KDE Frameworks: 6.24.0 Qt: Using 6.10.2 and built against 6.10.2 Fedora Linux 44 (Forty Four Prerelease) (Xcb) Build ABI: x86_64-little_endian-lp64 Kernel: linux 6.19.7-300.fc44.x86_64 Linux/KDE Plasma: plasma-welcome-6.6.2-1.fc44.x86_64 ADDITIONAL INFORMATION I'm running under xfce Back trace on crash -------- #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44 #1 0x00007fe9fb07aa73 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89 #2 0x00007fe9fb01f34e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 #3 0x00007fe9fb0067b3 in __GI_abort () at abort.c:77 #4 0x00007fe9fb007804 in __libc_message_impl (vma_name=vma_name@entry=0x7fe9fb1baea3 "glibc: assert", fmt=<optimized out>) at ../sysdeps/posix/libc_fatal.c:138 #5 0x00007fe9fb017285 in __libc_message_wrapper (vmaname=0x7fe9fb1baea3 "glibc: assert", fmt=<optimized out>) at ../include/stdio.h:203 #6 __assert_fail (assertion=assertion@entry=0x7fe9f87892c8 "!jas_global.initialized", file=file@entry=0x7fe9f8784848 "/builddir/build/BUILD/jasper-4.2.8-build/jasper-version-4.2.8/src/libjasper/base/jas_init.c", line=line@entry=505, function=function@entry=0x7fe9f878b460 <__PRETTY_FUNCTION__.7.lto_priv.2> "jas_init_library") at assert.c:37 #7 0x00007fe9f87461f0 in jas_init_library () at /usr/src/debug/jasper-4.2.8-2.fc44.x86_64/src/libjasper/base/jas_init.c:505 #8 0x00007fe8784248fe in Jpeg2000JasperReader::Jpeg2000JasperReader (this=0x7fff9fa0eab0, iod=<optimized out>, format=Jp2Format, this=<optimized out>, iod=<optimized out>, format=<optimized out>) at /usr/src/debug/qt6-qtimageformats-6.10.2-1.fc44.x86_64/src/plugins/imageformats/jp2/qjp2handler.cpp:316 #9 0x00007fe8784263f4 in QJp2Handler::write (this=0x55a4cdc48b90, image=...) at /usr/src/debug/qt6-qtimageformats-6.10.2-1.fc44.x86_64/src/plugins/imageformats/jp2/qjp2handler.cpp:222 #10 0x00007fe9fbeb4a3b in QImageWriter::write (this=0x7fff9fa0ec08, image=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/gui/image/qimagewriter.cpp:682 #11 0x00007fe9fbe7da03 in QImage::save (this=this@entry=0x7fff9fa0ec80, device=device@entry=0x7fff9fa0ec70, format=0x55a4cdba29e0 "J2K", quality=quality@entry=-1) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/gui/image/qimage.cpp:3967 --Type <RET> for more, q to quit, c to continue without paging-- #12 0x00007fe9fbf1c1f6 in QInternalMimeData::renderDataHelper (mimeType=..., data=data@entry=0x55a4c9c2b840) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/gui/kernel/qinternalmimedata.cpp:195 #13 0x00007fe8cc92d630 in QXcbMime::mimeDataForAtom (connection=0x55a4b04db1b0, a=a@entry=615, mimeData=mimeData@entry=0x55a4c9c2b840, data=data@entry=0x7fff9fa0ee80, atomFormat=atomFormat@entry=0x7fff9fa0ee70, dataFormat=dataFormat@entry=0x7fff9fa0ee74) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbmime.cpp:77 #14 0x00007fe8cc8f5aa4 in QXcbClipboard::sendSelection (this=this@entry=0x55a4b0515a50, d=d@entry=0x55a4c9c2b840, target=615, window=12582916, property=379) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbobject.h:17 #15 0x00007fe8cc8f7ad5 in QXcbClipboard::handleSelectionRequest (this=0x55a4b0515a50, req=req@entry=0x55a4cdc9f390) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbclipboard.cpp:593 #16 0x00007fe8cc8fbde0 in QXcbConnection::handleXcbEvent (this=this@entry=0x55a4b04db1b0, event=event@entry=0x55a4cdc9f390) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbconnection.cpp:667 #17 0x00007fe8cc8fd1d7 in QXcbConnection::processXcbEvents (this=0x55a4b04db1b0, flags=...) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbconnection.cpp:1088 #18 0x00007fe8cc9215cf in xcbSourceDispatch (source=<optimized out>) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:57 #19 0x00007fe9f92e1e64 in g_main_dispatch (context=0x7fe8b8000f00) at ../glib/gmain.c:3591 #20 g_main_context_dispatch_unlocked (context=0x7fe8b8000f00) at ../glib/gmain.c:4451 #21 0x00007fe9f92e5f78 in g_main_context_iterate_unlocked (context=context@entry=0x7fe8b8000f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4516 #22 0x00007fe9f92e6123 in g_main_context_iteration (context=0x7fe8b8000f00, may_block=1) at ../glib/gmain.c:4582 #23 0x00007fe9fba508ed in QEventDispatcherGlib::processEvents (this=0x55a4b0766150, flags=...) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:399 #24 0x00007fe9fb716f03 in QEventLoop::exec (this=this@entry=0x7fff9fa0f380, flags=..., flags@entry=...) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/corelib/global/qflags.h:77 #25 0x00007fe9fb7120d2 in QCoreApplication::exec () at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/corelib/kernel/qcoreapplication.cpp:1452 #26 0x00007fe9fbeeb88d in QGuiApplication::exec () at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/gui/kernel/qguiapplication.cpp:1977 #27 0x00007fe9fca3ee19 in QApplication::exec () at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/widgets/kernel/qapplication.cpp:2575 #28 0x000055a477e50d27 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/core/app/main/main.cpp:496 -------- The first call to the library init is coming from: #0 jas_init_library () at /usr/src/debug/jasper-4.2.8-2.fc44.x86_64/src/libjasper/base/jas_init.c:476 #1 0x00007ffea4391788 in DigikamJPEG2000DImgPlugin::DImgJPEG2000Plugin::DImgJPEG2000Plugin (this=this@entry=0x55556af950f0, parent=0x0) at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/core/dplugins/dimg/jpeg2000/dimgjpeg2000plugin.cpp:55 #2 0x00007ffea4398e47 in qt_plugin_instance () at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/redhat-linux-build/core/dplugins/dimg/jpeg2000/DImg_JPEG2000_Plugin_autogen/include/moc_dimgjpeg2000plugin.cpp:110 #3 0x00007ffff4049443 in QLibraryPrivate::pluginInstance (this=0x55556af54bc0) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/corelib/plugin/qlibrary.cpp:515 #4 0x00007ffff3da4d33 in QPluginLoader::instance (this=this@entry=0x55556af950c0) at /usr/src/debug/qt6-qtbase-6.10.2-2.fc44.x86_64/src/corelib/plugin/qpluginloader.cpp:143 #5 0x00007ffff5fe864d in Digikam::DPluginLoader::Private::loadPlugins (this=0x555556ee5460) at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/core/libs/dplugins/setup/dpluginloader_p.cpp:244 #6 0x00007ffff7544cc3 in Digikam::DigikamApp::DigikamApp (this=this@entry=0x555556228200, this=<optimized out>) at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/core/app/main/digikamapp.cpp:167 #7 0x0000555555557a2a in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/digikam-9.0.0-2.fc44.x86_64/core/app/main/main.cpp:441 2503419 1 metzpinguin 2026-03-15 05:02:11 +0000 The second Jasper initialization comes from the KImageFormat plugins, specifically from our QImage Loader. For some reason, the image is being rejected by our Jpeg2000 Loader, resulting in a fallback to the QImage Loader and thus triggering the second Jasper initialization. We need to block Jpeg2000 files for our QImage Loader. I see no other option. Maik 2503420 2 metzpinguin 2026-03-15 05:05:41 +0000 I now see that it's a save operation; the QImage Loader is saving a file. What file format is being saved when it crashes? Maik 2503421 3 metzpinguin 2026-03-15 05:13:34 +0000 Okay, it's a paste operation and it uses QImage::save()... Maik 2503427 4 metzpinguin 2026-03-15 06:59:01 +0000 We set the image selection as a QImage using QMimeData::setImageData() and pass it to the QClipboard. Internally in Qt, it's then stored as a Jpeg2000 image in QInternalMimeData::renderDataHelper(). Normally, Qt would process it as a PNG. So I suspect Fedora patched something to improve interaction with GNOME programs. To avoid encoding the QMimeData myself, I'll take a different approach... Maik 2503443 5 gilbertd+kde 2026-03-15 11:46:15 +0000 (In reply to Maik Qualmann from comment #4) > We set the image selection as a QImage using QMimeData::setImageData() and > pass it to the QClipboard. Internally in Qt, it's then stored as a Jpeg2000 > image in QInternalMimeData::renderDataHelper(). Normally, Qt would process > it as a PNG. So I suspect Fedora patched something to improve interaction > with GNOME programs. > > To avoid encoding the QMimeData myself, I'll take a different approach... > > Maik The jasper library init all seems rather delicate; neither or the routes that use it sound unreasonable, and who knows if another plugin would call a library that would want it somewhere. 2503525 6 metzpinguin 2026-03-15 19:25:26 +0000 Git commit 9dd5e992b71b6a855fc419114344d4bd181bc08f by Maik Qualmann. Committed on 15/03/2026 at 19:23. Pushed by mqualmann into branch 'master'. use the QImage Loader if JPEG2000 is available. Since jas_init_library() and jas_cleanup_library() can only be called once in the main thread, it is almost impossible to handle them if another Jasper Loader is present in a library. FIXED-IN: 9.1.0 M +1 -1 NEWS M +13 -2 core/dplugins/dimg/jpeg2000/dimgjpeg2000plugin.cpp https://invent.kde.org/graphics/digikam/-/commit/9dd5e992b71b6a855fc419114344d4bd181bc08f 2503627 7 gilbertd+kde 2026-03-16 12:30:10 +0000 (In reply to Maik Qualmann from comment #6) > Git commit 9dd5e992b71b6a855fc419114344d4bd181bc08f by Maik Qualmann. > Committed on 15/03/2026 at 19:23. > Pushed by mqualmann into branch 'master'. > > use the QImage Loader if JPEG2000 is available. > Since jas_init_library() and jas_cleanup_library() can only be > called once in the main thread, it is almost impossible to > handle them if another Jasper Loader is present in a library. > FIXED-IN: 9.1.0 > > M +1 -1 NEWS > M +13 -2 core/dplugins/dimg/jpeg2000/dimgjpeg2000plugin.cpp > > https://invent.kde.org/graphics/digikam/-/commit/ > 9dd5e992b71b6a855fc419114344d4bd181bc08f Thanks - that was quick! Maik built testing packages on Fedora with that fix in, andit seems to fix it for me. Thanks again, Dave