[solved] QObject::children problem

broadpeak

What is wrong?
@
QObject* parentObject;
QObjectList ol = parentObject->children();
@

When the parentObject is empty, I got this error:

(Internal error: pc 0xf in read in psymtab, but not in symtab.)
...
(Internal error: pc 0x10 in read in psymtab, but not in symtab.)
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
...
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
(Internal error: pc 0xf in read in psymtab, but not in symtab.)
...
(Internal error: pc 0x10 in read in psymtab, but not in symtab.)
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
...
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
(Internal error: pc 0xf in read in psymtab, but not in symtab.)
...
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
...
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
(Internal error: pc 0xf in read in psymtab, but not in symtab.)
....
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
...
can't find linker symbol for virtual table for QObject' value found qt_meta_stringdata_QAbstractItemView' instead
found `qt_meta_stringdata_QAbstractItemView' instead
...
ASSERT: "d" in file c:\Digia\Qt\4.8.3\include/QtCore/../../src/corelib/tools/qscopedpointer.h, line 112
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.

JKSH

parentObject is an invalid pointer. You need to create an object with the new keyword and assign it to the pointer.

broadpeak

Thanks, I've modified the code according to your suggestion.
But:
I got the same error message:
ASSERT: "d" in file c:\Digia\Qt\4.8.3\include/QtCore/../../src/corelib/tools/qscopedpointer.h, line 112
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.

sierdzio

Make sure to rerun qmake so that moc picks up your changes.

broadpeak

[quote author="sierdzio" date="1353932193"]Make sure to rerun qmake so that moc picks up your changes.[/quote]

I made a full clean-up, made a qmake run, made a full rebuild and
I have no success.
('m gonna crayzeeee...)

broadpeak

Waaaaaaaaaaaahhhhh! Solved!
The problem was in full other place!
I had an object on the stack, and after the code goes out of scope
that object is cleared....

sierdzio

Ah, good to know, because I was out of ideas here :)

JKSH

That's quite strange. Can you make a minimal program that shows that behaviour (e.g. put the buggy code in int main() ) and post it here?

JKSH

Whoops, too late :) Glad to hear you solved it

broadpeak

Typical C++ happyness:
The point of crash and the error message was
totally misleading (for me) :)
Thanks to all!