another teething pain for adapting my code to run on 64bit Mac/Cocoa widgetset - so bare with me ...
after solving the OpenGL rendering context error, I now can build my GUI without OpenGL with
lazbuild --ws=cocoa --cpu=x86_64 mcxstudio.lpr, however, running the compiled GUI, it still crashed when closing a ShowModal window.
Here is the code for popping up the modal window and retrieve the settings - it runs fine on Windows/Linux/Carbon-i386 version of Mac, but it crashed when the modal window is closed on Cocoa-64bit Mac
does Cocoa support ShowModal? any experience on solving this would be appreciated!
here is the source code when the crash was triggered:
https://github.com/fangq/mcx/blob/1adb6c6a02a3205349e5bb11fabe2e82fd750fe7/mcxstudio/mcxgui.pas#L740-L754 fmNewSession:=TfmNewSession.Create(self);
fmnewSession.grProgram.Columns:=1;
if (Sender is TEdit) then begin
fmnewSession.grProgram.ItemIndex:=grProgram.ItemIndex;
fmNewSession.edSession.Text:=edSession.Text;
fmNewSession.Tag:=1;
end;
if(fmNewSession.ShowModal= mrOK) then begin
sessionid:=Trim(fmNewSession.edSession.Text);
sessiontype:=fmNewSession.grProgram.ItemIndex;
end else begin
fmNewSession.Free;
exit;
end;
fmNewSession.Free;
the detailed error information from the system
*** Terminating app due to uncaught exception 'NSGenericException', reason: '-[NSAlert runModal] may not be invoked inside of transaction begin/commit pair, or inside of transaction commit (usually this means it was invoked inside of a view's -drawRect: method.)'
the full message is
System Integrity Protection: disabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000008c
Exception Note: EXC_CORPSE_NOTIFY
VM Regions Near 0x8c:
-->
__TEXT 000000010d8c0000-000000010dd70000 [ 4800K] r-x/rwx SM=COW V" [/Users/fangq/space/git/Project/github/mcx/mcxstudio/debug/mcxstudio]
Application Specific Information:
*** Terminating app due to uncaught exception 'NSGenericException', reason: '-[NSAlert runModal] may not be invoked inside of transaction begin/commit pair, or inside of transaction commit (usually this means it was invoked inside of a view's -drawRect: method.)'
terminating with uncaught exception of type NSException
abort() called
Application Specific Backtrace 1:
0 CoreFoundation 0x00007fff5557df3b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fff7c8da942 objc_exception_throw + 48
2 CoreFoundation 0x00007fff5560e2d5 +[NSException raise:format:] + 197
3 AppKit 0x00007fff5334b431 _NSRunModal + 484
4 AppKit 0x00007fff52d2a67d -[NSAlert runModal] + 240
5 mcxstudio 0x000000010d9e2fd4 COCOAINT_$$_COCOAPROMPTUSER$crcF62BAB40 + 1100
6 mcxstudio 0x000000010d9e31c0 COCOAINT$_$TCOCOAWIDGETSET_$__$$_PROMPTUSER$crc484A2DB2 + 80
7 mcxstudio 0x000000010d999fa5 LCLINTF_$$_PROMPTUSER$crc484A2DB2 + 93
8 mcxstudio 0x000000010d99a591 LCLINTF_$$_PROMPTUSER$crcB76EAC20 + 185
9 mcxstudio 0x000000010d8e70ce FORMS$_$TAPPLICATION_$__$$_SHOWEXCEPTION$EXCEPTION + 734
10 mcxstudio 0x000000010d8e61df FORMS$_$TAPPLICATION_$__$$_HANDLEEXCEPTION$TOBJECT + 551
11 mcxstudio 0x000000010d8e685e FORMS$_$TAPPLICATION_$__$$_RUNLOOP + 158
12 mcxstudio 0x000000010d9d870d -[TCocoaApplication run] + 53
13 mcxstudio 0x000000010d9d93a3 COCOAINT$_$TCOCOAWIDGETSET_$__$$_APPRUN$TAPPLICATIONMAINLOOP + 83
14 mcxstudio 0x000000010d8e67b4 FORMS$_$TAPPLICATION_$__$$_RUN + 100
15 mcxstudio 0x000000010d8c1389 PASCALMAIN + 146
16 ??? 0x0000000000000001 0x0 + 1
steps to reproduce the issue (on a Mac computer):
git clone https://github.com/fangq/mcx.git
cd mcx/mcxstudio
lazbuild --ws=cocoa --cpu=x86_64 mcxstudio.lpr
cd debug
open mcxstudio.app
then clicking the "New" button the toolbar (first button), type any string as session ID, and click "OK" - the program crashes.
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