Bug report #8269
QgsDataProvider.changeAttributeValues() causes memory error when called with non-QVariant argument
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Python plugins | ||
| Affected QGIS version: | 1.8.0 | Regression?: | No |
| Operating System: | Mac OS X | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | |
| Crashes QGIS or corrupts data: | Yes | Copied to github as #: | 17072 |
Description
I ran the following code in the Python console, with a layer selected:
>>> l = qgis.utils.iface.activeLayer()
>>> l = qgis.utils.iface.activeLayer()
>>> p = l.dataProvider()
>>> from PyQt4.QtCore import QVariant
>>> p.changeAttributeValues({0 : { 0 : QVariant(0) } })
True
>>> p.changeAttributeValues({0 : { 0 : 0 } })
The second-to-last line works fine. Running the final line, however, causes QGIS to crash, with the error
QGIS(89325,0x7fff7cc04180) malloc: *** error for object 0x1065d35c0: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug Abort trap: 6
The trace given in the Apple crash report is
Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Application Specific Information: *** error for object 0x1065d35c0: pointer being freed was not allocated Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff8e821212 __pthread_kill + 10 1 libsystem_c.dylib 0x00007fff8f177b54 pthread_kill + 90 2 libsystem_c.dylib 0x00007fff8f1bbdce abort + 143 3 libsystem_c.dylib 0x00007fff8f18f9b9 free + 392 4 QtCore.so 0x00000001153aa567 release_QVariant_4 + 39 5 core.so 0x0000000116318444 convertTo_QMap_3800_0600QMap_1800_0100QVariant + 694 6 sip.so 0x000000011532a83d sip_api_convert_to_type + 208 7 sip.so 0x000000011532e176 parsePass2 + 2313 8 sip.so 0x00000001153314b2 parseKwdArgs + 266 9 sip.so 0x00000001153316b2 sip_api_parse_args + 133 10 core.so 0x00000001163525bb meth_QgsVectorDataProvider_changeAttributeValues + 130 11 org.python.python 0x000000011509e5a9 PyEval_EvalFrameEx + 9244 12 org.python.python 0x000000011509c147 PyEval_EvalCodeEx + 1934 13 org.python.python 0x000000011509eb3e PyEval_EvalFrameEx + 10673 14 org.python.python 0x000000011509c147 PyEval_EvalCodeEx + 1934 15 org.python.python 0x00000001150a28df 0x115085000 + 121055 16 org.python.python 0x000000011509e63a PyEval_EvalFrameEx + 9389 17 org.python.python 0x000000011509c147 PyEval_EvalCodeEx + 1934 18 org.python.python 0x00000001150a28df 0x115085000 + 121055 19 org.python.python 0x000000011509e63a PyEval_EvalFrameEx + 9389 20 org.python.python 0x00000001150a2869 0x115085000 + 120937 21 org.python.python 0x000000011509e63a PyEval_EvalFrameEx + 9389 22 org.python.python 0x00000001150a2869 0x115085000 + 120937 23 org.python.python 0x000000011509e63a PyEval_EvalFrameEx + 9389 24 org.python.python 0x000000011509c147 PyEval_EvalCodeEx + 1934 25 org.python.python 0x00000001150d5d7a 0x115085000 + 331130 26 org.python.python 0x00000001150946c6 PyObject_Call + 97 27 org.python.python 0x00000001150b19bf 0x115085000 + 182719 28 org.python.python 0x00000001150946c6 PyObject_Call + 97 29 org.python.python 0x00000001150a2018 PyEval_CallObjectWithKeywords + 177 30 sip.so 0x000000011532b706 sip_api_call_method + 186 31 QtGui.so 0x0000000115806db0 sipVH_QtGui_25(PyGILState_STATE, _object*, QKeyEvent*) + 64 32 QtGui.so 0x00000001158b308d sipQTextEdit::keyPressEvent(QKeyEvent*) + 99 33 QtGui 0x0000000104d436cb QWidget::event(QEvent*) + 2491 34 QtGui 0x00000001050d623c QFrame::event(QEvent*) + 44 35 QtGui 0x000000010516365b QAbstractScrollArea::event(QEvent*) + 123 36 QtGui 0x000000010514e98b QTextEdit::event(QEvent*) + 91 37 QtGui.so 0x00000001158b019c sipQTextEdit::event(QEvent*) + 76 38 QtGui 0x0000000104ceb93d QApplicationPrivate::notify_helper(QObject*, QEvent*) + 189 39 QtGui 0x0000000104cf403b QApplication::notify(QObject*, QEvent*) + 9883 40 org.qgis.qgis_core 0x0000000103d84762 QgsApplication::notify(QObject*, QEvent*) + 100 41 QtCore 0x0000000104a3417c QCoreApplication::notifyInternal(QObject*, QEvent*) + 124 42 QtGui 0x0000000104cebb4c qt_sendSpontaneousEvent(QObject*, QEvent*) + 44 43 QtGui 0x0000000104d67fe1 QKeyMapper::sendKeyEvent(QWidget*, bool, QEvent::Type, int, QFlags<Qt::KeyboardModifier>, QString const&, bool, int, unsigned int, unsigned int, unsigned int, bool*) + 225 44 QtGui 0x0000000104d68ea3 QKeyMapperPrivate::translateKeyEvent(QWidget*, OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*, bool) + 659 45 QtGui 0x0000000104c9dadf qt_dispatchKeyEvent(void*, QWidget*) + 223 46 QtGui 0x0000000104c8fe3f -[QCocoaView keyDown:] + 127 47 com.apple.AppKit 0x00007fff8faf8050 -[NSWindow sendEvent:] + 9687 48 QtGui 0x0000000104c94a37 -[QCocoaWindow sendEvent:] + 87 49 com.apple.AppKit 0x00007fff8faf3674 -[NSApplication sendEvent:] + 5761 50 QtGui 0x0000000104c99b24 -[QNSApplication sendEvent:] + 84 51 com.apple.AppKit 0x00007fff8fa0924a -[NSApplication run] + 636 52 QtGui 0x0000000104ca4900 QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 1824 53 QtCore 0x0000000104a33094 QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 68 54 QtCore 0x0000000104a33444 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 324 55 QtCore 0x0000000104a35b2c QCoreApplication::exec() + 188 56 org.qgis.qgis 0x000000010000996b main + 10523 57 org.qgis.qgis 0x0000000100006c04 start + 52 Thread 1:: Dispatch queue: com.apple.libdispatch-manager 0 libsystem_kernel.dylib 0x00007fff8e821d16 kevent + 10 1 libdispatch.dylib 0x00007fff8d833dea _dispatch_mgr_invoke + 883 2 libdispatch.dylib 0x00007fff8d8339ee _dispatch_mgr_thread + 54 Thread 2: 0 libsystem_kernel.dylib 0x00007fff8e8216d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8f178f4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8f178d13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8f1631d1 start_wqthread + 13 Thread 3: 0 libsystem_kernel.dylib 0x00007fff8e8216d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8f178f4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8f178d13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8f1631d1 start_wqthread + 13 Thread 4: 0 libsystem_kernel.dylib 0x00007fff8e8216d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8f178f4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8f178d13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8f1631d1 start_wqthread + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000006 rcx: 0x00007fff5fbfcad8 rdx: 0x0000000000000000 rdi: 0x0000000000000707 rsi: 0x0000000000000006 rbp: 0x00007fff5fbfcb00 rsp: 0x00007fff5fbfcad8 r8: 0x00007fff7cc03278 r9: 0x0000000000000000 r10: 0x0000000020000000 r11: 0x0000000000000206 r12: 0x0000000107830e00 r13: 0x0000000105f4f000 r14: 0x00007fff7cc04180 r15: 0x0000000000000004 rip: 0x00007fff8e821212 rfl: 0x0000000000000206 cr2: 0x00007fff7cbfcff0 Logical CPU: 0
History
#1
Updated by Matthias Kuhn over 10 years ago
- Status changed from Open to Closed
This works with QGIS 2.0 (And there is no more data type QVariant in PyQT...) And as it seems, it's easy to work around in 1.8.
Please reopen if this is still an issue.