0019276: "Read/Write lock not acquired!" error message is not very informative

ID	Project	Category	View Status	Date Submitted	Last Update

0019276	MMW 5	Extensions framework	public	2022-07-22 20:58	2022-08-05 15:53

Reporter	zvezdan	Assigned To
Priority	none	Severity	minor	Reproducibility	always
Status	feedback	Resolution	open

Summary	0019276: "Read/Write lock not acquired!" error message is not very informative
Description	I don't have any use of this message showing that it happened in (D:\Delphi\MediaMonkeyCleanTrunk\HTML5Monkey\BaseShared.pas, line 4071). It would be useful if it shows at least in which script it happened, if not together with the line number. And it is really frustrating that this error message could be terminated only by killing the program in Task Manager, because I have that thing very often.
Tags	No tags attached.

Fixed in build

Ludek 2022-07-26 14:11 developer ~0068902 Last edited: 2022-07-26 14:12	This is kind of assertion when you try to access item in the list by its index and the list isn't locked for writing/reading I think that in the crash log the accompanying JS code is shown unless this happens in a background tasks? Do you have example crash log (or code) to analyze?

zvezdan 2022-07-26 15:07 updater ~0068912	window.uitools.addToolButton('righttoolbuttons', 'remove', function () { var selTracks = window.uitools.getSelectedTracklist(); selTracks.whenLoaded().then(function () { var oSelTrack = selTracks.getValue(0); }); }, 'Test'); MediaMonkeyEngine (Read lock not acquired!).el (67,928 bytes) ��EurekaLog 7.9.2.0 update 2 95F78409B7627A4982562C0EDFD745D6 00000000000000000000000000000000 DA39A3EE5E6B4B0D3255BFEF95601890AFD80709 545349DE7E5A264DA7D818E3A67D1CA5 Application: --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 1.1 Start Date : Tue, 26 Jul 2022 17:01:01 +0200 1.2 Name/Description: MediaMonkeyEngine.exe - (MediaMonkey 5) 1.3 Version Number : 5.0.4.2657 1.4 Parameters : --type=renderer --locales-dir-path="F:\Virtual Machines\Shared Folder\Temp\Software\MediaMonkey\Portable MM5\chromium\98\locales" --log-severity=disable --uncaught-exception-stack-size=10 --user-data-dir="C:\Users\Zvezdan\AppData\Local\CEF\User Data" --no-sandbox --autoplay-policy=no-user-gesture-required --log-file="F:\Virtual Machines\Shared Folder\Temp\Software\MediaMonkey\Portable MM5\debug.log" --remote-debugging-port=9222 --js-flags="\"--expose-gc\"" --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --launch-time-ticks=3699823289309 --mojo-platform-channel-handle=1956 --field-trial-handle=1772,14789184350231514938,17260196892120065228,131072 --disable-features=IsolateOrigins,site-per-process /prefetch:1 1.5 Compilation Date: Thu, 14 Jul 2022 23:54:24 +0200 1.6 Up Time : 31 second(s) Exception: ---------------------------------------------------------------------------------------------------------------------- 2.1 Date : Tue, 26 Jul 2022 17:01:33 +0200 2.2 Address : 015CA8ED 2.3 Module Name : MediaMonkeyEngine.exe - (MediaMonkey 5) 2.4 Module Version: 5.0.4.2657 2.5 Type : EAssertionFailed 2.6 Message : Read lock not acquired! (D:\Delphi\MediaMonkeyCleanTrunk\HTML5Monkey\BaseShared.pas, line 4077). 2.7 ID : AB1A0000 2.8 Count : 1 2.9 Status : New 2.10 Note : 2.11 Sent : 0 Active Controls: ------------------------------------------------ 4.1 Form Class : TMediaMonkeyInstanceManager 4.2 Form Text : MediaMonkey5 4.3 Control Class: 4.4 Control Text : Steps to reproduce: ------------ 8.1 Text: Call Stack Information: ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- \|Methods \|Details\|Stack \|Address \|Module \|Offset \|Source \|Unit \|Class \|Procedure/Method \|Line \| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- \|Exception Thread: ID=364; Parent=0; Priority=15 \| \|Class=; Name=MAIN \| \|DeadLock=0; Wait Chain= \| \|Comment= \| \|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\| \|7FFFFFFE\|04 \|00000000\|015CA8ED\|MediaMonkeyEngine.exe\|011CA8ED\|BaseShared.pas \|BaseMedia \|{BaseShared}TSharedList<BaseMedia.ISongListData> \|AssertReadLock \|4077[10] \| \|00000008\|04 \|0018EB4C\|015CE51E\|MediaMonkeyEngine.exe\|011CE51E\|BaseShared.pas \|BaseMedia \|{BaseShared}TSharedList<BaseMedia.ISongListData> \|getValue \|6294[1] \| \|00000008\|04 \|0018EB54\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018EB54\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018EB74\|004BCE3D\|MediaMonkeyEngine.exe\|000BCE3D\|System.Rtti.pas \|System.Rtti \| \|RawInvoke \|7021[46] \| \|00000008\|04 \|0018EB84\|004BD213\|MediaMonkeyEngine.exe\|000BD213\|System.Rtti.pas \|System.Rtti \| \|Invoke \|7216[57] \| \|00000008\|04 \|0018EB8C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018EB8C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018EBF4\|004BCFD0\|MediaMonkeyEngine.exe\|000BCFD0\|System.Rtti.pas \|System.Rtti \| \|Invoke \|7159[0] \| \|00000008\|04 \|0018EBF4\|004B396F\|MediaMonkeyEngine.exe\|000B396F\|System.Rtti.pas \|System.Rtti \|TRttiInstanceMethodEx \|DispatchInvoke \|5344[97] \| \|00000008\|04 \|0018EC0C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018EC0C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018ECF0\|004BD5A4\|MediaMonkeyEngine.exe\|000BD5A4\|System.Rtti.pas \|System.Rtti \|TRttiMethod \|Invoke \|7875[1] \| \|00000008\|04 \|0018ED00\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018ED00\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018ED30\|004BD560\|MediaMonkeyEngine.exe\|000BD560\|System.Rtti.pas \|System.Rtti \|TRttiMethod \|Invoke \|7874[0] \| \|00000008\|04 \|0018ED30\|01A19FBC\|MediaMonkeyEngine.exe\|01619FBC\|ceflib.pas \|ceflib \| \|DefaultExecute \|24690[301]\| \|00000008\|04 \|0018ED4C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018ED4C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018EE1C\|01A197C0\|MediaMonkeyEngine.exe\|016197C0\|ceflib.pas \|ceflib \| \|DefaultExecute \|24389[0] \| \|00000008\|04 \|0018EE1C\|0191B395\|MediaMonkeyEngine.exe\|0151B395\|BaseApp.pas \|BaseApp \|TSharedWindowHandler \|Execute \|8527[4] \| \|00000008\|04 \|0018EE3C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018EE3C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018EE58\|01A0F4F4\|MediaMonkeyEngine.exe\|0160F4F4\|ceflib.pas \|ceflib \| \|cef_v8_handler_execute \|19987[5] \| \|00000008\|04 \|0018EE6C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018EE6C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F4C4\|0040BF58\|MediaMonkeyEngine.exe\|0000BF58\|System.pas \|System \| \|_FinalizeArray \|31051[0] \| \|00000008\|04 \|0018F4C4\|0040BF2C\|MediaMonkeyEngine.exe\|0000BF2C\|System.pas \|System \| \|_FinalizeRecord \|30891[25] \| \|00000008\|04 \|0018F5AC\|01A12665\|MediaMonkeyEngine.exe\|01612665\|ceflib.pas \|ceflib \|TCefv8ValueRef \|ExecuteFunction \|21840[17] \| \|00000008\|04 \|0018F5C4\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F5C4\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F5D0\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F5D0\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F618\|0197436D\|MediaMonkeyEngine.exe\|0157436D\|BaseShared.pas \|BaseShared \|TPromise \|promiseLoop \|10059[39] \| \|00000008\|04 \|0018F62C\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F62C\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F638\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F638\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F6B0\|019741B0\|MediaMonkeyEngine.exe\|015741B0\|BaseShared.pas \|BaseShared \|TPromise \|promiseLoop \|10020[0] \| \|00000008\|04 \|0018F6B0\|01974E28\|MediaMonkeyEngine.exe\|01574E28\|BaseShared.pas \|BaseShared \|TPromise \|processLoops \|10229[55] \| \|00000008\|04 \|0018F6C4\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F6C4\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F72C\|01974BB0\|MediaMonkeyEngine.exe\|01574BB0\|BaseShared.pas \|BaseShared \|TPromise \|processLoops \|10174[0] \| \|00000008\|04 \|0018F72C\|01975525\|MediaMonkeyEngine.exe\|01575525\|BaseShared.pas \|BaseShared \|TPromise \|handlePromise \|10299[27] \| \|00000008\|04 \|0018F748\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F748\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F77C\|01975380\|MediaMonkeyEngine.exe\|01575380\|BaseShared.pas \|BaseShared \|TPromise \|handlePromise \|10272[0] \| \|00000008\|04 \|0018F77C\|019752C0\|MediaMonkeyEngine.exe\|015752C0\|BaseShared.pas \|BaseShared \|sync$12018$ActRec \|$0$0$Body \|10267[1] \| \|00000008\|04 \|0018F788\|01971670\|MediaMonkeyEngine.exe\|01571670\|BaseShared.pas \|BaseShared \| \|processFastTaskRec \|9565[22] \| \|00000008\|04 \|0018F790\|0040993B\|MediaMonkeyEngine.exe\|0000993B\|System.pas \|System \| \|_HandleFinally \|19169[74] \| \|00000008\|04 \|0018F790\|0040991E\|MediaMonkeyEngine.exe\|0000991E\|System.pas \|System \| \|_HandleFinally \|19153[58] \| \|00000008\|04 \|0018F7C8\|01971570\|MediaMonkeyEngine.exe\|01571570\|BaseShared.pas \|BaseShared \| \|processFastTaskRec \|9543[0] \| \|00000008\|04 \|0018F7C8\|019719F9\|MediaMonkeyEngine.exe\|015719F9\|BaseShared.pas \|BaseShared \|TFastTask \|Execute \|9627[1] \| \|00000008\|04 \|0018F7D4\|01A0F61D\|MediaMonkeyEngine.exe\|0160F61D\|ceflib.pas \|ceflib \| \|cef_task_execute \|20002[1] \| \|00000008\|04 \|0018FD30\|0040E590\|MediaMonkeyEngine.exe\|0000E590\|System.pas \|System \|TInterfacedObject \|_AddRef \|36161[0] \| \|00000008\|04 \|0018FD30\|01A0F3CC\|MediaMonkeyEngine.exe\|0160F3CC\|ceflib.pas \|ceflib \| \|cef_base_add_ref \|19105[1] \| \|00000008\|04 \|0018FD9C\|01A0D13E\|MediaMonkeyEngine.exe\|0160D13E\|ceflib.pas \|ceflib \| \|CefLoadLib \|18573[630]\| \|00000008\|04 \|0018FEFC\|01A0BC2D\|MediaMonkeyEngine.exe\|0160BC2D\|ceflib.pas \|ceflib \| \|CefLoadLibDefault \|17913[2] \| \|00000008\|04 \|0018FF44\|00F1EA39\|MediaMonkeyEngine.exe\|00B1EA39\|AppInitCode.pas \|AppInitCode \| \|doAppInitialize \|2016[135] \| \|00000008\|04 \|0018FF74\|01A9D070\|MediaMonkeyEngine.exe\|0169D070\|MediaMonkeyEngine.dpr\|MediaMonkeyEngine\| \|Initialization \|129[2] \| \|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\| \| \| \|Running Thread: ID=10672; Parent=3340; Priority=-2 \| \|Class=TBQThread; Name= (GenThread.TGenThread.Execute) \| \|DeadLock=0; Wait Chain=thread: [ $29B0 / 10672 ] is blocked \| \|Comment= \| \|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\| \|7FFFFFFE\|01 \|00000000\|7733FD31\|ntdll.dll \|0001FD31\| \| \| \| \| \| \|00000008\|04 \|0B33FD54\|019FB692\|MediaMonkeyEngine.exe\|015FB692\|AppManager.pas \|AppManager \|TCallBacks.ProcessEventDoneCallbacks$11356$ActRec\|$0$Body \|1154[94] \| \|00000008\|04 \|0B33FDB8\|007EA7D2\|MediaMonkeyEngine.exe\|003EA7D2\|Workers.pas \|Workers \|TAnonProcTask \|execute \|963[3] \| \|00000008\|04 \|0B33FDC0\|007EA819\|MediaMonkeyEngine.exe\|003EA819\|Workers.pas \|Workers \|TAnonProcTask \|execute \|972[12] \| \|00000008\|04 \|0B33FDC0\|007EA7DD\|MediaMonkeyEngine.exe\|003EA7DD\|Workers.pas \|Workers \|TAnonProcTask \|execute \|963[3] \| \|00000008\|04 \|0B33FDD8\|007E9B7E\|MediaMonkeyEngine.exe\|003E9B7E\|Workers.pas \|Workers \|TBackgroundQueue \|ProcessTasks \|779[111] \| \|00000008\|04 \|0B33FE74\|007EB43F\|MediaMonkeyEngine.exe\|003EB43F\|Workers.pas \|Workers \|TBQThread \|GenExecute \|1192[2] \| \|00000008\|04 \|0B33FE90\|01A253F1\|MediaMonkeyEngine.exe\|016253F1\|GenThread.pas \|GenThread \|TGenThread \|Execute \|893[33] \| \|00000008\|04 \|0B33FE98\|01A25417\|MediaMonkeyEngine.exe\|01625417\|GenThread.pas \|GenThread \|TGenThread \|Execute \|899[39] \| \|00000008\|04 \|0B33FE98\|01A253FF\|MediaMonkeyEngine.exe\|016253FF\|GenThread.pas \|GenThread \|TGenThread \|Execute \|893[33] \| \|00000008\|04 \|0B33FEF8\|00522ADD\|MediaMonkeyEngine.exe\|00122ADD\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14561[16] \| \|00000008\|04 \|0B33FF00\|00522AFA\|MediaMonkeyEngine.exe\|00122AFA\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14563[18] \| \|00000008\|04 \|0B33FF00\|00522AE8\|MediaMonkeyEngine.exe\|00122AE8\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14561[16] \| \|00000008\|04 \|0B33FF28\|005DE0CC\|MediaMonkeyEngine.exe\|001DE0CC\|EThreadsManager.pas \|EThreadsManager \| \|NakedBeginThreadWrapper \|1353[5] \| \|00000008\|04 \|0B33FF38\|007B6D5B\|MediaMonkeyEngine.exe\|003B6D5B\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5777[8] \| \|00000008\|04 \|0B33FF44\|007B6D94\|MediaMonkeyEngine.exe\|003B6D94\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5782[13] \| \|00000008\|04 \|0B33FF44\|007B6D6F\|MediaMonkeyEngine.exe\|003B6D6F\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5779[10] \| \|00000008\|04 \|0B33FF5C\|005DFE86\|MediaMonkeyEngine.exe\|001DFE86\|EThreadsManager.pas \|EThreadsManager \| \|ThreadWrapperCT \|2278[22] \| \|7FFFFFFE\|04 \|00000000\|01A24BF3\|MediaMonkeyEngine.exe\|01624BF3\|GenThread.pas \|GenThread \|TGenThread \|Create \|660[38] \| \|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\| \| \| \|Running Thread: ID=3460; Parent=364; Priority=-2 \| \|Class=TBQThread; Name= (GenThread.TGenThread.Execute) \| \|DeadLock=0; Wait Chain=thread: [ $0D84 / 3460 ] is blocked \| \|Comment= \| \|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\| \|7FFFFFFE\|01 \|00000000\|773400FD\|ntdll.dll \|000200FD\| \| \| \| \| \| \|00000008\|04 \|0AE3FD30\|004091B8\|MediaMonkeyEngine.exe\|000091B8\|System.pas \|System \|TMonitor \|GetFieldAddress \|17258[0] \| \|00000008\|04 \|0AE3FD30\|00408E80\|MediaMonkeyEngine.exe\|00008E80\|System.pas \|System \|TMonitor \|Destroy \|17035[0] \| \|00000008\|04 \|0AE3FD34\|004085A3\|MediaMonkeyEngine.exe\|000085A3\|System.pas \|System \|TObject \|CleanupInstance \|15668[24] \| \|00000008\|04 \|0AE3FD3C\|0040578C\|MediaMonkeyEngine.exe\|0000578C\|GETMEM.INC \|System \| \|SysFreeMem \|2900[0] \| \|00000008\|04 \|0AE3FD3C\|00406B84\|MediaMonkeyEngine.exe\|00006B84\|System.pas \|System \| \|_FreeMem \|4364[20] \| \|00000008\|04 \|0AE3FD40\|00408350\|MediaMonkeyEngine.exe\|00008350\|System.pas \|System \|TObject \|FreeInstance \|15456[2] \| \|00000008\|04 \|0AE3FD50\|007B6C91\|MediaMonkeyEngine.exe\|003B6C91\|EExceptionManager.pas\|EExceptionManager\| \|DestroyHook \|5750[11] \| \|00000008\|04 \|0AE3FD60\|0040E5C6\|MediaMonkeyEngine.exe\|0000E5C6\|System.pas \|System \|TInterfacedObject \|_Release \|36174[4] \| \|00000008\|04 \|0AE3FDA4\|0040578C\|MediaMonkeyEngine.exe\|0000578C\|GETMEM.INC \|System \| \|SysFreeMem \|2900[0] \| \|00000008\|04 \|0AE3FDA4\|00406B84\|MediaMonkeyEngine.exe\|00006B84\|System.pas \|System \| \|_FreeMem \|4364[20] \| \|00000008\|04 \|0AE3FDA8\|00408350\|MediaMonkeyEngine.exe\|00008350\|System.pas \|System \|TObject \|FreeInstance \|15456[2] \| \|00000008\|04 \|0AE3FDB0\|00408BDA\|MediaMonkeyEngine.exe\|00008BDA\|System.pas \|System \| \|_ClassDestroy \|16799[0] \| \|00000008\|04 \|0AE3FDB4\|01A22776\|MediaMonkeyEngine.exe\|01622776\|BaseClasses.pas \|BaseClasses \|TCancellableTask \|Destroy \|1339[3] \| \|00000008\|04 \|0AE3FDC0\|00499FEA\|MediaMonkeyEngine.exe\|00099FEA\|System.SyncObjs.pas \|System.SyncObjs \|THandleObject \|WaitFor \|707[13] \| \|00000008\|04 \|0AE3FDE4\|007E9A02\|MediaMonkeyEngine.exe\|003E9A02\|Workers.pas \|Workers \|TBackgroundQueue \|ProcessTasks \|739[71] \| \|00000008\|04 \|0AE3FE74\|007EB43F\|MediaMonkeyEngine.exe\|003EB43F\|Workers.pas \|Workers \|TBQThread \|GenExecute \|1192[2] \| \|00000008\|04 \|0AE3FE90\|01A253F1\|MediaMonkeyEngine.exe\|016253F1\|GenThread.pas \|GenThread \|TGenThread \|Execute \|893[33] \| \|00000008\|04 \|0AE3FE98\|01A25417\|MediaMonkeyEngine.exe\|01625417\|GenThread.pas \|GenThread \|TGenThread \|Execute \|899[39] \| \|00000008\|04 \|0AE3FE98\|01A253FF\|MediaMonkeyEngine.exe\|016253FF\|GenThread.pas \|GenThread \|TGenThread \|Execute \|893[33] \| \|00000008\|04 \|0AE3FEF8\|00522ADD\|MediaMonkeyEngine.exe\|00122ADD\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14561[16] \| \|00000008\|04 \|0AE3FF00\|00522AFA\|MediaMonkeyEngine.exe\|00122AFA\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14563[18] \| \|00000008\|04 \|0AE3FF00\|00522AE8\|MediaMonkeyEngine.exe\|00122AE8\|System.Classes.pas \|System.Classes \| \|ThreadProc \|14561[16] \| \|00000008\|04 \|0AE3FF28\|005DE0CC\|MediaMonkeyEngine.exe\|001DE0CC\|EThreadsManager.pas \|EThreadsManager \| \|NakedBeginThreadWrapper \|1353[5] \| \|00000008\|04 \|0AE3FF38\|007B6D5B\|MediaMonkeyEngine.exe\|003B6D5B\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5777[8] \| \|00000008\|04 \|0AE3FF44\|007B6D94\|MediaMonkeyEngine.exe\|003B6D94\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5782[13] \| \|00000008\|04 \|0AE3FF44\|007B6D6F\|MediaMonkeyEngine.exe\|003B6D6F\|EExceptionManager.pas\|EExceptionManager\| \|DefaultThreadHandleException\|5779[10] \| \|00000008\|04 \|0AE3FF5C\|005DFE86\|MediaMonkeyEngine.exe\|001DFE86\|EThreadsManager.pas \|EThreadsManager \| \|ThreadWrapperCT \|2278[22] \| \|7FFFFFFE\|04 \|00000000\|01A24BF3\|MediaMonkeyEngine.exe\|01624BF3\|GenThread.pas \|GenThread \|TGenThread \|Create \|660[38] \| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Assembler Information: ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ; Base Address: $15CA000, Allocation Base: $400000, Region Size: 5062656 ; Allocation Protect: PAGE_EXECUTE_WRITECOPY, Protect: PAGE_EXECUTE_READ ; State: MEM_COMMIT, Type: MEM_IMAGE ; ; ; BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4070 - Offset=18) ; ------------------------------------------------------------------------------------------------- 015CA8A2 8B8308010000 MOV EAX, [EBX+$00000108] 015CA8A8 40 INC EAX 015CA8A9 83E001 AND EAX, 1 015CA8AC 6BC00B IMUL EAX, EAX, $0B 015CA8AF 8D448368 LEA EAX, [EBX+EAX4+$68] 015CA8B3 8945FC MOV [EBP-4], EAX 015CA8B6 EB3A JMP +$3A ; ($015CA8F2) BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) ; ; Line=4074 - Offset=40 ; --------------------- 015CA8B8 E8E3BF4500 CALL +$45BFE3 ; ($01A268A0) GenThread.getThreadIndex ; ; Line=4075 - Offset=45 ; --------------------- 015CA8BD 8B94830C010000 MOV EDX, [EBX+EAX4+$0000010C] ; ; Line=4076 - Offset=52 ; --------------------- 015CA8C4 6BCA0B IMUL ECX, EDX, $0B 015CA8C7 8D4C8B68 LEA ECX, [EBX+ECX4+$68] 015CA8CB 894DFC MOV [EBP-4], ECX ; ; Line=4077 - Offset=62 ; --------------------- 015CA8CE C1E205 SHL EDX, 5 015CA8D1 8D94D30C020000 LEA EDX, [EBX+EDX8+$0000020C] 015CA8D8 833C8200 CMP DWORD PTR [EDX+EAX4], 0 015CA8DC 7F14 JG +$14 ; ($015CA8F2) BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) 015CA8DE B9ED0F0000 MOV ECX, $00000FED 015CA8E3 BA08A95C01 MOV EDX, $015CA908 ; ($015CA908) BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) UNICODE: 'D:\Delphi\MediaMonkeyCleanTrunk\HTML5Monkey\BaseShared.pas' BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) 015CA8E8 B88CA95C01 MOV EAX, $015CA98C ; ($015CA98C) BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) UNICODE: 'Read lock not acquired!' BaseMedia.{BaseShared}TSharedList<BaseMedia.ISongListData>.AssertReadLock (Line=4079) ; ; Line=4077 - Offset=93 ; --------------------- 015CA8ED E812F9E3FE CALL -$011C06EE ; ($0040A204) System._Assert ; <-- EXCEPTION ; ; Line=4079 - Offset=98 ; --------------------- 015CA8F2 8B45FC MOV EAX, [EBP-4] 015CA8F5 5B POP EBX 015CA8F6 59 POP ECX 015CA8F7 5D POP EBP Registers: ----------------------------- EAX: 0018EA60 EDI: 00000FED EBX: 015CA98C ESI: 015CA908 ECX: 00000007 EBP: 0018EAB0 EDX: 00000000 ESP: 0018EA60 EIP: 7505B727 FLG: 00000216 EXP: 015CA8ED STK: 0018EA60 Stack: Memory Dump: ------------------ --------------------------------------------------------------------------- 0018EA9C: CCCCCCCC 015CA8ED: E8 12 F9 E3 FE 8B 45 FC 5B 59 5D C3 00 00 00 B0 ......E.[Y]..... 0018EA98: CCCCCCCC 015CA8FD: 04 02 00 FF FF FF FF 3A 00 00 00 44 00 3A 00 5C .......:...D.:.\ 0018EA94: CCCCCCCC 015CA90D: 00 44 00 65 00 6C 00 70 00 68 00 69 00 5C 00 4D .D.e.l.p.h.i.\.M 0018EA90: CCCCCCCC 015CA91D: 00 65 00 64 00 69 00 61 00 4D 00 6F 00 6E 00 6B .e.d.i.a.M.o.n.k 0018EA8C: 0018EAE4 015CA92D: 00 65 00 79 00 43 00 6C 00 65 00 61 00 6E 00 54 .e.y.C.l.e.a.n.T 0018EA88: 0018EB20 015CA93D: 00 72 00 75 00 6E 00 6B 00 5C 00 48 00 54 00 4D .r.u.n.k.\.H.T.M 0018EA84: 00000FED 015CA94D: 00 4C 00 35 00 4D 00 6F 00 6E 00 6B 00 65 00 79 .L.5.M.o.n.k.e.y 0018EA80: 015CA908 015CA95D: 00 5C 00 42 00 61 00 73 00 65 00 53 00 68 00 61 .\.B.a.s.e.S.h.a 0018EA7C: 015CA98C 015CA96D: 00 72 00 65 00 64 00 2E 00 70 00 61 00 73 00 00 .r.e.d...p.a.s.. 0018EA78: 09BE9E50 015CA97D: 00 00 00 B0 04 02 00 FF FF FF FF 17 00 00 00 52 ...............R 0018EA74: 015CA8F2 015CA98D: 00 65 00 61 00 64 00 20 00 6C 00 6F 00 63 00 6B .e.a.d. .l.o.c.k 0018EA70: 00000007 015CA99D: 00 20 00 6E 00 6F 00 74 00 20 00 61 00 63 00 71 . .n.o.t. .a.c.q 0018EA6C: 7505B727 015CA9AD: 00 75 00 69 00 72 00 65 00 64 00 21 00 00 00 66 .u.i.r.e.d.!...f 0018EA68: 00000000 015CA9BD: 8D 40 00 55 8B EC E8 A8 F7 FF FF 5D C3 8D 80 00 .@.U.......].... 0018EA64: 00000001 015CA9CD: 00 00 00 55 8B EC E8 A8 F7 FF FF 5D C3 8D 80 00 ...U.......].... 0018EA60: 0EEDFADE 015CA9DD: 00 00 00 C3 66 8D 80 00 00 00 00 64 66 8D 80 00 ....f......df... MediaMonkeyEngine (Read lock not acquired!).el (67,928 bytes)

zvezdan 2022-07-26 15:11 updater ~0068913	Yes, I know where I should put the locked method, but with so many tracklists in my scripts and their reading/writing, it is quite easily to forget that silly locking thing.

zvezdan 2022-08-05 15:53 updater ~0068979	Here is an example when your error message is not only uninformative, but it is misleading. I don't know how many days, if not weeks, I spent chasing this bug. And guess what, the Write lock error message is generated by the line that is executed within the modifyAsync method, so it should be locked for writing. The steps to execute: 1. start DebugView; 2. install the attached script; 3. create 'ZDTest' playlist and add several tracks to it; 4. click on the script's toolbar button and wait 10-30 seconds -> Write lock not acquired! Here is the code of init.js: var goQueueListPlaylist; var goQueueListTracks; window.uitools.addToolButton('righttoolbuttons', 'remove', function () { var progress = app.backgroundTasks.createNew(); var iQueueListTimeout = undefined; app.listen(app, 'playlistChange', (playlist, changeType, newValue, oldValue) => { if (playlist !== undefined && (changeType === undefined \|\| changeType === 'tracklist') && goQueueListPlaylist && playlist.id === goQueueListPlaylist.id) { if (iQueueListTimeout) { clearTimeout(iQueueListTimeout); iQueueListTimeout = undefined; } iQueueListTimeout = window.requestTimeout(function () { goQueueListTracks = goQueueListPlaylist.getTracklist(); // goQueueListTracks.whenLoaded().then(() => { // goQueueListTracks.locked(function () { // // if (goQueueListTracks.count > 0) { // var oQueueTrack = goQueueListTracks.getFastObject(0, oQueueTrack); // ODS('ZDTest5 - playlistChange - oQueueTrack.id: ' + oQueueTrack.id); // // } // }); // }); }, 100); } }); app.playlists.getByTitleAsync('ZDTest').then(function(oCurPlaylist) { if (!oCurPlaylist) { ODS("ZDTest playlist doesn't exist"); return; } goQueueListPlaylist = oCurPlaylist; (function loop() { setTimeout(function() { var oQueueList = goQueueListPlaylist.getTracklist(); oQueueList.whenLoaded().then(function () { goQueueListPlaylist.clearTracksAsync().then(() => { goQueueListPlaylist.addTracksAsync(oQueueList).then(() => { ODS('ZDTest5 - oQueueList.count: ' + oQueueList.count); if (!progress.terminated && !window._cleanUpCalled) { loop(); } }); }); }); }, 250); })(); (function loop() { setTimeout(function() { if (goQueueListTracks) { goQueueListTracks.modifyAsync(() => { if (goQueueListTracks.count > 0) { // goQueueListTracks.beginUpdate(); goQueueListTracks.clearSelection(); ODS('ZDTest5 - before setSelected - goQueueListTracks.count: ' + goQueueListTracks.count); goQueueListTracks.setSelected(0, true); ODS('ZDTest5 - after setSelected'); // goQueueListTracks.endUpdate(); } if (!progress.terminated && !window._cleanUpCalled) { loop(); } }); } else if (!progress.terminated && !window._cleanUpCalled) { loop(); } }, 250); })(); }); }, 'ZDTest5'); This is just a test example and I don't need your advice how to resolve this thing since I already resolved it. I just want to make a point how your error messages are often not very useful. MM4 error handling was a way much better. ZDTest5.mmip (1,089 bytes) screenshot.31.png (8,765 bytes) screenshot.31.png (8,765 bytes)

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