Delphi and DUnitX: ensure you catch the ENoTestsRegistered exception
Posted by jpluimers on 2021/04/27
If you setup an empty test project, then DUnitX will throw an ENoTestsRegistered.
This exception is not handled, which results in two things:
- a run-time error 217 if your application is a non-UI application
- a memory leak detected by FastMM4
So better catch the ENoTestsRegistered exception in your .dpr level: a caught exception will be destroyed by the exception handling mechanism.
–jeroen
Leak example (the stack trace towards the top of the stack is in accurate; this is a Delphi problem with handling exceptions that bubble up to the main project entry point)
--------------------------------2019/5/7 13:10:33-------------------------------- A memory block has been leaked. The size is: 36 This block was allocated by thread 0x1DF4, and the stack trace (return addresses) at the time was: 40711A [System.pas][System][@GetMem$qqri][4755] 40910F [System.pas][System][TObject.NewInstance][16919] 40992E [System.pas][System][@ClassCreate$qqrpvzc][18252] 42FB07 [System.SysUtils.pas][System.SysUtils][Sysutils.Exception.Create][22886] 40F15C [System.pas][System][@IntfCast$qqrr44System.%DelphiInterface$17System.IInterface%x44System.%DelphiInterface$17System.IInterface%rx5_GUID][37358] 602D0C [DUnitX.TestRunner][Testrunner.TDUnitXTestRunner.Execute] 5E5F22 [DUnitX.WeakReference][Weakreference.TWeakReferencedObject._AddRef] 6296BB [TestInsight.DUnitX.pas][TestInsight.DUnitX][Dunitx.RunRegisteredTests$qqrv][149] 75300A [UnitTestRunner.pas][UnitTestRunner][TUnitTestRunner.RunRegisteredTests][136] 5114CA [UnitTestRegistration.pas][UnitTestRegistration][TUnitTestRegistration.RegisterTests][20] 7608B4 The block is currently used for an object of class: ENoTestsRegistered The allocation number is: 17539 Current memory dump of 256 bytes starting at pointer address 7F86B870: 6C 0A 5B 00 CC 77 92 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4C A1 EF 78 80 80 80 80 80 80 80 80 00 00 00 00 B1 BA 86 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 87 19 00 00 1A 71 40 00 EF AF 40 00 20 B2 40 00 F5 BF 40 00 73 8B 51 00 25 77 54 00 29 7B 54 00 8F EC 54 00 3F E2 54 00 52 03 55 00 FB CD 59 00 F4 1D 00 00 F4 1D 00 00 36 71 40 00 A9 B0 40 00 19 C6 40 00 3D C5 40 00 41 93 40 00 26 91 40 00 79 99 40 00 A0 C5 59 00 A7 92 40 00 E7 CA 59 00 A7 92 40 00 18 00 00 00 B0 04 02 00 BB E4 D7 85 84 1C 77 00 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 44 1B 28 7A 80 80 80 80 80 80 80 80 80 80 80 80 00 00 00 00 A1 AD 86 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 6A 16 00 00 1A 71 40 00 0F 91 40 00 51 05 41 00 l . [ . Ì w ’ . . . . . . . . . . . . . . . . . . . . L ¡ ï x € € € € € € € € . . . . ± º † . . . . . . . . . . . . . . . . ‡ . . . . q @ . ï ¯ @ . ² @ . õ ¿ @ . s ‹ Q . % w T . ) { T . ì T . ? â T . R . U . û Í Y . ô . . . ô . . . 6 q @ . © ° @ . . Æ @ . = Å @ . A “ @ . & ‘ @ . y ™ @ . Å Y . § ’ @ . ç Ê Y . § ’ @ . . . . . ° . . . » ä × … „ . w . € € € € € € € € € € € € € € € € € € € € D . ( z € € € € € € € € € € € € . . . . ¡ † . . . . . . . . . . . . . . . . j . . . . q @ . . ‘ @ . Q . A . --------------------------------2019/5/7 13:10:33-------------------------------- A memory block has been leaked. The size is: 68 This block was allocated by thread 0x1DF4, and the stack trace (return addresses) at the time was: 40711A [System.pas][System][@GetMem$qqri][4755] 40AFEF [System.pas][System][@NewUnicodeString$qqri][24647] 40B220 [System.pas][System][@UStrFromPWCharLen$qqrr20System.UnicodeStringpbi][25325] 410A01 [System.pas][System][LoadResString$qqrp20System.TResStringRec][39405] 77053779 [Unknown function at RtlAllocateHeap] 76EEEE9A [Unknown function at RegCloseKey] 76EEDD47 [RegOpenKeyExInternalW] 76EEDE01 [RegOpenKeyExInternalW] 77053779 [Unknown function at RtlAllocateHeap] 76EEDBFC [RegOpenKeyExW] 77051F3E [RtlAllocateHeap] The block is currently used for an object of class: UnicodeString The allocation number is: 17538 Current memory dump of 256 bytes starting at pointer address 7F9277C0: B0 04 02 00 01 00 00 00 16 00 00 00 4E 00 6F 00 20 00 54 00 65 00 73 00 74 00 20 00 46 00 69 00 78 00 74 00 75 00 72 00 65 00 73 00 20 00 66 00 6F 00 75 00 6E 00 64 00 00 00 B8 EF CE 3A 80 80 80 80 80 80 80 80 80 80 00 00 00 00 21 7C 92 7F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 97 25 00 00 89 71 40 00 DD D6 40 00 9B 95 40 00 1E D8 40 00 CA 7D 46 00 83 7E 46 00 0C B6 45 00 5C B6 45 00 13 87 46 00 D9 87 46 00 27 90 45 00 F4 1D 00 00 F4 1D 00 00 36 71 40 00 78 D9 40 00 82 C6 40 00 3D C5 40 00 41 93 40 00 26 91 40 00 79 99 40 00 5D B7 45 00 2D 91 40 00 79 99 40 00 A7 92 40 00 38 00 00 00 00 00 00 00 A5 A0 4C 85 84 1C 77 00 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 ° . . . . . . . . . . . N . o . . T . e . s . t . . F . i . x . t . u . r . e . s . . f . o . u . n . d . . . ¸ ï Î : € € € € € € € € € € . . . . ! | ’ . . . . . . . . . . . . . . . . — % . . ‰ q @ . Ý Ö @ . › • @ . . Ø @ . Ê } F . ƒ ~ F . . ¶ E . \ ¶ E . . ‡ F . Ù ‡ F . ' E . ô . . . ô . . . 6 q @ . x Ù @ . ‚ Æ @ . = Å @ . A “ @ . & ‘ @ . y ™ @ . ] · E . - ‘ @ . y ™ @ . § ’ @ . 8 . . . . . . . ¥ L … „ . w . € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € € --------------------------------2019/5/7 13:10:33-------------------------------- This application has leaked memory. The small block leaks are (excluding expected leaks registered by pointer): 21 - 36 bytes: ENoTestsRegistered x 1 53 - 68 bytes: UnicodeString x 1 Note: Memory leak detail is logged to a text file in the same folder as this application. To disable this memory leak check, undefine "EnableMemoryLeakReporting".
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