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Memory Leak
Posted: Thu May 30, 2019 8:05 pm
by dkjMusic
I have TDOCXReadWriteVcl and TAXWPreviewVcl components on Delphi form. I use DOCXReadWriteVcl.LoadFromFile(ProjectRF) to load an existing .docx document and everything looks fine.
In the FormClose I have DOCXReadWriteVcl.Free; AXWPreviewVcl.Free; and Action := caFree;
But when I close the app (it has ReportMemoryLeaksOnShutdown := True;), I get the following memory leak:
---------------------------
Unexpected Memory Leak
---------------------------
An unexpected memory leak has occurred. The unexpected small block leaks are:
21 - 28 bytes: TMBCSEncoding x 1
What do I need to close the leak?
Re: Memory Leak
Posted: Mon Jun 03, 2019 4:11 pm
by larsa
Hello
I have also noticed this, but I have no idea why it happeneds. No TMBCSEncoding is created and the construct of TMBCSEncoding is never called. Delphi bug?
Re: Memory Leak
Posted: Tue Dec 15, 2020 8:10 am
by oz_
Hi, this leak happens too over here.
This is the callstack, maybe it helps to find the issue. I'm compiling directly from sources by the way.
King regards,
Orest.
Code: Select all
A memory block has been leaked. The size is: 36
This block was allocated by thread 0x42EC, and the stack trace (return addresses) at the time was:
40787E [System.pas][System][@GetMem$qqri][4791]
40AD97 [System.pas][System][TObject.NewInstance][17386]
40B532 [System.pas][System][@ClassCreate$qqrpvzc][18765]
441962 [System.SysUtils.pas][System.SysUtils][Sysutils.TMBCSEncoding.Create][33284]
8459336 [GetRawStackTrace]
772F166C [ZwReadFile]
4415FC [System.SysUtils.pas][System.SysUtils][Sysutils.TEncoding.GetEncoding][33124]
1CB1727 [System.Zip.pas][System.Zip][GetCP437Encoding][582]
1CB1750 [System.Zip.pas][System.Zip][Zip.TZipFile.GetEncoding][594]
1CB4B13 [System.Zip.pas][System.Zip][Zip.TZipFile.GetTextEncode][1415]
1CB50ED [System.Zip.pas][System.Zip][Zip.TZipFile.IndexOf][1535]
8459336 [GetRawStackTrace]
8459336 [GetRawStackTrace]
1CCD8AC [AXWReadWriteZIP5.pas][AXWReadWriteZIP5][TXLSZipArchiveIntfDelphi.Find][357]
1CCD92F [AXWReadWriteZIP5.pas][AXWReadWriteZIP5][TXLSZipArchiveIntfDelphi.OpenStream][370]
40B5A0 [System.pas][System][@AfterConstruction$qqrxp14System.TObject][18814]
1E01C32 [xpgAXWParseContentType.pas][xpgAXWParseContentType][TXPGDocContentType.Create][712]
1E05BCE [AXWReadWriteOPC5.pas][AXWReadWriteOPC5][TOPCContainer.ReadContentTypes][1111]
1E05A6F [AXWReadWriteOPC5.pas][AXWReadWriteOPC5][TOPCContainer.OpenRead][1070]
1E08E2D [AXWReadWriteOPC5.pas][AXWReadWriteOPC5][TOPC_DOCX.OpenRead][2199]
1E0AD8C [AXWDocxManager.pas][AXWDocxManager][TDocxManager.LoadFromStream][300]
1E1C152 [AXWReadDOCX.pas][AXWReadDOCX][TAXWReadDOCX.LoadFromStream][2839]
1E80859 [DOCXReadWriteVcl.pas][DOCXReadWriteVcl][TDOCXReadWrite.LoadFromStream][240]
1E80618 [DOCXReadWriteVcl.pas][DOCXReadWriteVcl][TDOCXReadWrite.GetFiletype][202]
1E8074A [DOCXReadWriteVcl.pas][DOCXReadWriteVcl][TDOCXReadWrite.LoadFromFile][213]
Re: Memory Leak
Posted: Mon Dec 21, 2020 10:58 am
by larsa
Hello
As you can see from the dump, everything is happening in the delphi system units. Nothing to do.