public struct Foo
{
        uint8 param;
}

void dosomething( bool on )
{
        var foo = Foo() { param = on ? 0 : 1 };
}

void main()
{
}

===============================================
mickey@opal:/tmp$ LANG=C valac s.vala

** (valac:19333): CRITICAL **: vala_block_insert_before: assertion `stmt != NULL' failed

** (valac:19333): CRITICAL **: vala_block_insert_before: assertion `stmt != NULL' failed
s.vala:6.1-6.16: warning: method `dosomething' never used
void dosomething( bool on )
^^^^^^^^^^^^^^^^
s.vala:8.6-8.39: warning: local variable `foo' declared but never used
	var foo = Foo() { param = on ? 0 : 1 };
	    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/tmp/s.vala.c: In function 'dosomething':
/tmp/s.vala.c:52: error: '_tmp0_' undeclared (first use in this function)
/tmp/s.vala.c:52: error: (Each undeclared identifier is reported only once
/tmp/s.vala.c:52: error: for each function it appears in.)
error: cc exited with status 256
Compilation failed: 1 error(s), 2 warning(s)