Re: [Vala] Problem with struct properties

[Erwin Rol <mailinglists erwinrol com>]

After a chat with Lethalman__ on irc I filed a bug for the problem under 
https://bugzilla.gnome.org/show_bug.cgi?id=625758

- Erwin


Erwin Rol wrote:
> Hello all,
>
> I am rather new to vala but I just wanted to give it a try. But I hate 
> to say it, but the first thing I tried directly ended up being a SIGSEGV 
> generation tool :-) Of course that might not be vala's fault, but i 
> don't see what i am doing wrong.
>
> I have the following code (my real program was bigger, but this test 
> prog segfaults in the same way), and it segfaults when trying to set the 
> second property. What am i (or what is vala) doing wrong here ?
>
> struct TestStruct {
>     public int dummy;
> }
>
> class TestClass : Object {
>         public int test_int { get; set; }
>         public TestStruct test_struct { get; set; }
> }
>
> static int main(string[] args)
> {
>         TestClass tc = new TestClass();
>
>         int ti = 10;
>         tc.set("test_int", ti);
>
>         TestStruct ts = TestStruct(){ dummy = 0 };
>         tc.set("test_struct", ts);  // <---- SIGSEGV
>
>         return 0;
> }
>
> The gdb back trace is as follows. (and doing *value when value == NULL 
> doesn't sound like a smart thing)
>
> Starting program: /home/erwin/vala/test
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000400fd0 in testclass_set_test_struct (self=0x2227010, 
> value=0x0) at test.c:141
> 141        self->priv->_test_struct = *value;
> (gdb) bt
> #0  0x0000000000400fd0 in testclass_set_test_struct (self=0x2227010, 
> value=0x0) at test.c:141
> #1  0x000000000040130a in testclass_set_property (object=0x2227010, 
> property_id=2, value=0x7fffad852f70, pspec=0x2226800) at test.c:208
> #2  0x0000003ca2e10433 in IA__g_object_set_valist (object=<value 
> optimized out>, first_property_name=<value optimized out>, 
> var_args=<value optimized out>) at gobject.c:697
> #3  0x0000003ca2e108b4 in IA__g_object_set (_object=<value optimized 
> out>, first_property_name=<value optimized out>) at gobject.c:1212
> #4  0x0000000000401410 in _vala_main (args=0x7fffad853228, 
> args_length1=1) at test.vala:18
> #5  0x0000000000401454 in main (argc=1, argv=0x7fffad853228) at 
> test.vala:10
> (gdb)
>
>
> TIA,
>
> Erwin