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+Title: Issues with Cocoa API on OS X 10.5 & up
+Author: sevan
+Created: Thu, 01 May 2025 20:59:47 +0000
+State: open
+
+Take the title with a pinch of salt as I'v only checked on OS X 10.4, 10.5, 10.11 which are all ancient.
+On 10.4, there's no issue.
+On 10.5, dillo launches fine and the gui is functional. However in the terminal it was launched in, it is reporting errors regarding the Cocoa API.
+```
+<Error>: CGContextSetTextPosition: invalid context
+<Error>: CGContextSetShouldAntialias: invalid context
+<Error>: CGContextSetShouldAntialias: invalid context
+```
+flood the terminal, an then after a short while, dillo crashes.
+
+
+```
+Process: dillo [48397]
+Path: /Users/sme/tigerbrew/bin/dillo
+Identifier: dillo
+Version: ??? (???)
+Code Type: X86 (Native)
+Parent Process: bash [135]
+
+Interval Since Last Report: 566426 sec
+Crashes Since Last Report: 83
+Per-App Interval Since Last Report: 0 sec
+Per-App Crashes Since Last Report: 1
+
+Date/Time: 2025-05-01 20:57:20.168 +0100
+OS Version: Mac OS X 10.5.8 (9L31a)
+Report Version: 6
+Anonymous UUID: 3E54E8B4-5A3C-46D1-BBCB-860782663158
+
+Exception Type: EXC_BAD_ACCESS (SIGSEGV)
+Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000b00028
+Crashed Thread: 0
+
+Thread 0 Crashed:
+0 com.apple.CoreGraphics 0x94f3e770 CGSConvertBGR888toRGBA8888 + 160
+1 com.apple.CoreGraphics 0x94e9758b argb32_image + 5611
+2 libRIP.A.dylib 0x939a4725 ripd_Mark + 326
+3 libRIP.A.dylib 0x9399e9a3 ripl_BltImage + 1307
+4 libRIP.A.dylib 0x93988a18 ripc_RenderImage + 273
+5 libRIP.A.dylib 0x93998e96 ripc_DrawImage + 5102
+6 com.apple.CoreGraphics 0x94e89f4d CGContextDrawImage + 397
+7 libfltk.1.3.dylib 0x0026be30 fl_scroll(int, int, int, int, int, int, void (*)(void*, int, int, int, int), void*) + 420
+8 dillo 0x00077cc8 dw::fltk::FltkViewport::draw() + 432
+9 libfltk.1.3.dylib 0x00218264 Fl_Group::update_child(Fl_Widget&) const + 98
+10 libfltk.1.3.dylib 0x00218397 Fl_Group::draw_children() + 295
+11 libfltk.1.3.dylib 0x00218264 Fl_Group::update_child(Fl_Widget&) const + 98
+12 libfltk.1.3.dylib 0x0025809d Fl_Wizard::draw() + 169
+13 libfltk.1.3.dylib 0x00218264 Fl_Group::update_child(Fl_Widget&) const + 98
+14 libfltk.1.3.dylib 0x00218397 Fl_Group::draw_children() + 295
+15 libfltk.1.3.dylib 0x00257c94 Fl_Window::draw() + 340
+16 libfltk.1.3.dylib 0x001f96c1 -[FLView drawRect:] + 193
+17 com.apple.AppKit 0x92f1abf8 -[NSView _drawRect:clip:] + 3853
+18 com.apple.AppKit 0x92f196ef -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1050
+19 com.apple.AppKit 0x92f18045 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 759
+20 com.apple.AppKit 0x92f144ab -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 3090
+21 com.apple.AppKit 0x9303243c -[NSView displayIfNeededIgnoringOpacity] + 443
+22 libfltk.1.3.dylib 0x001f08e6 Fl_X::flush() + 138
+23 libfltk.1.3.dylib 0x00200e89 Fl::flush() + 91
+24 libfltk.1.3.dylib 0x001f7efa fl_mac_flush_and_wait(double) + 428
+25 libfltk.1.3.dylib 0x00200f9d Fl::wait() + 45
+26 dillo 0x000085af main + 2799
+27 dillo 0x00007902 start + 54
+
+Thread 1:
+0 libSystem.B.dylib 0x9590660a select$DARWIN_EXTSN + 10
+1 libSystem.B.dylib 0x958e8055 _pthread_start + 321
+2 libSystem.B.dylib 0x958e7f12 thread_start + 34
+
+Thread 0 crashed with X86 Thread State (32-bit):
+ eax: 0x000000bf ebx: 0x94e95fbd ecx: 0xffffffff edx: 0x000000be
+ edi: 0x00b00020 esi: 0x000002fd ebp: 0xbfffdec8 esp: 0xbfffdea8
+ ss: 0x0000001f efl: 0x00210202 eip: 0x94f3e770 cs: 0x00000017
+ ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
+ cr2: 0x00b00028
+
+Binary Images:
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+0x97367000 - 0x97367ff8 com.apple.Cocoa 6.5 (???) <e064f94d969ce25cb7de3cfb980c3249> /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
+0x97368000 - 0x9749bfe7 com.apple.CoreFoundation 6.5.7 (476.19) <a332c8f45529ee26d2e9c36d0c723bad> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
+0x9752b000 - 0x975d2fec com.apple.CFNetwork 438.16 (438.16) <0a2f633dc532b176109547367f209ced> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
+0x975d3000 - 0x975dfff9 com.apple.helpdata 1.0.1 (14.2) /System/Library/PrivateFrameworks/HelpData.framework/Versions/A/HelpData
+0x97605000 - 0x97682feb com.apple.audio.CoreAudio 3.1.2 (3.1.2) <782a08c44be4698597f4bbd79cac21c6> /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio
+0x97683000 - 0x97699fe7 com.apple.CoreVideo 1.5.1 (1.5.1) <500f88e655f9566e02e08138f38e898d> /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo
+0x976a4000 - 0x976a5ffc libffi.dylib ??? (???) <a3b573eb950ca583290f7b2b4c486d09> /usr/lib/libffi.dylib
+0x97963000 - 0x9798bff7 com.apple.shortcut 1.0.1 (1.0) <37e4b08cfaf9edb08b8682a06c4ec844> /System/Library/PrivateFrameworks/Shortcut.framework/Versions/A/Shortcut
+0x9798c000 - 0x97a74ff3 com.apple.CoreData 100.2 (186.2) <44df326fea0236718f5ed64084e82270> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
+0x97aa7000 - 0x97aa7ffd com.apple.vecLib 3.4.2 (vecLib 3.4.2) /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib
+0xfffe8000 - 0xfffebfff libobjc.A.dylib ??? (???) /usr/lib/libobjc.A.dylib
+```
+
+On 10.11, the errors are still reported but dillo never crashes or at least it doesn't crash as quickly as it did on 10.5.
+Running dillo with `CG_CONTEXT_SHOW_BACKTRACE` set shows
+```
+May 1 21:32:53 dillo[48118] <Error>: CGContextSetTextPosition: invalid context 0x0. Backtrace:
+ <_Z15fl_text_extentsPKcRiS1_S1_S1_+80>
+ <_ZN2dw4fltk8FltkFontC2EPNS_4core5style9FontAttrsE+236>
+ <_ZN2dw4fltk8FltkFont6createEPNS_4core5style9FontAttrsE+61>
+ <_ZN11StyleEngineC2EPN2dw4core6LayoutEPK8DilloUrlS6_f+540>
+ <a_Web_dispatch_by_type+266>
+ <Cache_process_queue+803>
+ <Cache_delayed_process_queue_callback+69>
+ <_ZL8do_timerP16__CFRunLoopTimerPv+53>
+ <__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__+20>
+ <__CFRunLoopDoTimer+1075>
+ <__CFRunLoopDoTimers+298>
+ <__CFRunLoopRun+1841>
+ <CFRunLoopRunSpecific+296>
+ <RunCurrentEventLoopInMode+235>
+ <ReceiveNextEventCommon+184>
+ <_BlockUntilNextEventMatchingListInModeWithFilter+71>
+ <_DPSNextEvent+1067>
+ <-[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:]+454>
+ <_Z21fl_mac_flush_and_waitd+549>
+ <_ZN2Fl4waitEv+29>
+ <main+2221>
+```
+
+Issue is on the fltk side?
+
+--%--
+From: rodarima
+Date: Thu, 01 May 2025 21:25:20 +0000
+
+Can you provide the output of `dillo -v`? Sound like a FLTK issue, but as we only support 1.3.X for now, tou can consider it to be our fault. You may be lucky to be able to upgrade to a newer 1.3.X version which fixes it. I don't think they support the 1.3 series anymore.
+
+--%--
+From: sevan
+Date: Thu, 01 May 2025 21:30:04 +0000
+
+Ancient OS X with up to date components
+```
+Dillo v3.2.0
+Libraries: fltk/1.3.11 zlib/1.3.1 jpeg/90 png/1.6.45 webp/1.5.0 OpenSSL/3.5.0
+Features: +GIF +JPEG +PNG +SVG +WEBP -XEMBED +TLS
+```
+
+--%--
+From: rodarima
+Date: Thu, 01 May 2025 21:48:12 +0000
+
+Yeah, I don't think there is much you can do with FLTK 1.3 until we fix Dillo for FLTk 1.4, which is queued for the next Dillo release. You could try the FLTK 1.4.2 demos and check they work okay and that problem doesn't happen (specially the `bin/test/pack` program), otherwise you should be able to report those problem upstream in FLTK.
+
+See: #246
+
+--%--
+From: sevan
+Date: Thu, 01 May 2025 21:53:03 +0000
+
+Ok, I'll do that. \ No newline at end of file