View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0038352 | Packages | Database | public | 2021-01-13 22:13 | 2021-01-14 17:00 |
| Reporter | William Meyer | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | new | Resolution | open | ||
| OS | Windows 10 Pro 2H20 | ||||
| Product Version | 2.0.10 | ||||
| Summary | 0038352: CSVDataset failure | ||||
| Description | I am new to Lazarus, but a long time Delphi dev. I have noticed a problem with the CSVDataset component, and have minimized the steps needed to reproduce. CSVDataset in form designer easily crashes the IDE. | ||||
| Steps To Reproduce | 1. Create a new GUI application 2. Put a CSVDataset on the form. 3. Select the CSVDataset 4. In the Object Inspector, select a csv file. Mine has 5 columns, and maybe a thousand rows. 5. Now set the CSVDataset.Active to true. Wait a few seconds for it to read the file. 6. Now set the CSVDataset.Active to False. In a few seconds, the IDE will crash. Simple and repeatable. If I add a TDataSource and a VirtualDBGrid, and set Active in the OnFormCreate event, it works fine, reads the file, presents the data. | ||||
| Tags | No tags attached. | ||||
| Fixed in Revision | |||||
| LazTarget | |||||
| Widgetset | Win32/Win64 | ||||
| Attached Files |
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| related to | 0034435 | closed | Michael Van Canneyt | FPC | TCSVDataset file not readable |
| related to | 0037981 | new | Lazarus | Crash when opening a TCustomBufDataSet descendant with FieldDef's | |
| related to | 0037932 | assigned | Michael Van Canneyt | FPC | Dangling pointer left behind when closing a TBufDataset |
| related to | 0037915 | assigned | Michael Van Canneyt | FPC | Access Violation related to IndexDefs |
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Can be reproduced with the test project attached to the related report (0034435), and the crash happens also with Laz trunk / FPC trunk. Stack trace (of Laz-trunk / FPC trunk / DebugIDE) using config file C:\Lazarus\lazarus-trunk_fpc-trunk\lazarus.cfg SetPrimaryConfigPath NewValue="D:\ProgrammDaten\lazarus-config\lazarus-trunk_fpc-trunk" -> "D:\ProgrammDaten\lazarus-config\lazarus-trunk_fpc-trunk" Hint: (lazarus) [TMainIDE.ParseCmdLineOptions] PrimaryConfigPath="D:\ProgrammDaten\lazarus-config\lazarus-trunk_fpc-trunk" Hint: (lazarus) [TMainIDE.ParseCmdLineOptions] SecondaryConfigPath="C:\Lazarus\lazarus-trunk_fpc-trunk" Hint: (lazarus) [TBuildManager.SetBuildTarget] Old=i386-win32-win32 New=i386-win32-win32 Changed: OS/CPU=True LCL=False ---------------- TDesigner.PrepareFreeDesigner: TheFormEditor=TFormEditor, Designer=TDesigner LoadLFM Creating designer for hidden component of D:\Prog_Lazarus\bug_tracker\34435 - csvdataset\unit1.pas InitOpenedProjectFile select form in designer: Form1:TForm1 TDesigner TApplication.HandleException: EAccessViolation Access violation Stack trace: $00D535ED GETINDEXFIELDNAMES, line 3158 of fcl-db/src/base/bufdataset.pas $004C4438 GETSTRPROP, line 2396 of ../objpas/typinfo.pp $007F9317 GETSTRVALUEAT, line 3127 of propedits.pp $007F92D7 GETSTRVALUE, line 3122 of propedits.pp $007FC0F5 GETVALUE, line 4054 of propedits.pp $007F98E4 GETVISUALVALUE, line 3224 of propedits.pp $007FAA94 VALUEISSTREAMED, line 3621 of propedits.pp $007EA1FA DRAWVALUE, line 3023 of objectinspector.pp $007E9AC9 PAINTROW, line 3105 of objectinspector.pp $007EAC9F DOPAINT, line 3182 of objectinspector.pp $007EAFD9 PAINT, line 3226 of objectinspector.pp $005C13CE PAINTWINDOW, line 123 of include/customcontrol.inc $005A9313 PAINTHANDLER, line 4857 of include/wincontrol.inc $005AD92B WMPAINT, line 6836 of include/wincontrol.inc $005C129D WMPAINT, line 103 of include/customcontrol.inc $00410419 DISPATCH, line 688 of ../inc/objpas.inc $005AA86B WNDPROC, line 5429 of include/wincontrol.inc TDesigner.PrepareFreeDesigner: TheFormEditor=TFormEditor, Designer=TDesigner LAZARUS END - cleaning up ... FreeFormEditor: FormEditor1=TFormEditor Hint: (lazarus) [TMainIDE.Destroy] B -> inherited Destroy... TMainIDE Hint: (lazarus) [TMainIDE.Destroy] END |
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A note unrelated to the bug: if reading few thousand lines takes few seconds in a modern Windows machine, the code has serious performance issues and should be optimized. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-01-13 22:13 | William Meyer | New Issue | |
| 2021-01-13 22:20 | wp | Relationship added | related to 0034435 |
| 2021-01-13 22:24 | wp | Note Added: 0128303 | |
| 2021-01-13 22:33 | wp | Note Edited: 0128303 | View Revisions |
| 2021-01-13 22:46 | wp | Note Edited: 0128303 | View Revisions |
| 2021-01-14 15:35 | Juha Manninen | Relationship added | related to 0037981 |
| 2021-01-14 15:46 | Juha Manninen | Relationship added | related to 0037932 |
| 2021-01-14 15:46 | Juha Manninen | Relationship added | related to 0037915 |
| 2021-01-14 17:00 | Juha Manninen | Note Added: 0128319 |
