Please describe the problem:
Temporary variables created in the condition of a switch statement appear not to be getting predeclared in the C code.

Steps to reproduce:
using GLib;

namespace Blah {
	public class Foo: GLib.Object {
		public int blah{ get{ return 1; } }

		public static int main() {

			return 0;
		}// main

		public static void foo() {
			switch(new Foo().blah)
			{
				case 1:
					stdout.printf("Got 1\n");
					break;
				default:
					stdout.printf("Default\n");
					break;
			}
		}
	}// Foo
}// Blah


Actual results:
blah.c: In function ‘blah_foo_foo’:
blah.c:31: error: ‘_tmp1’ undeclared (first use in this function)
blah.c:31: error: (Each undeclared identifier is reported only once
blah.c:31: error: for each function it appears in.)
blah.c:31: error: ‘_tmp0’ undeclared (first use in this function)


Expected results:
Successful compilation.

Does this happen every time?
Yes.

Other information: