Make vtable_allocation always succeed

Author: syvb

src/vtable.rs

@@ -72,10 +72,7 @@ pub(crate) fn get_vtable<'tcx>(
     let vtable_ptr = if let Some(vtable_ptr) = fx.vtables.get(&(ty, trait_ref)) {
         *vtable_ptr
     } else {
-        let vtable_alloc_id = match fx.tcx.vtable_allocation(ty, trait_ref) {
-            Ok(alloc) => alloc,
-            Err(_) => fx.tcx.sess.fatal("allocation of constant vtable failed"),
-        };
+        let vtable_alloc_id = fx.tcx.vtable_allocation(ty, trait_ref);
         let vtable_allocation = fx.tcx.global_alloc(vtable_alloc_id).unwrap_memory();
         let vtable_ptr = pointer_for_allocation(fx, vtable_allocation);