connection: abort if a listener function is NULL

Signed-off-by: Ryo Munakata <ryomnktml@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

diff --git a/src/connection.c b/src/connection.c
index f9f2474..2545194 100644 (file)
--- a/src/connection.c
+++ b/src/connection.c
@@ -934,6 +934,11 @@ wl_closure_invoke(struct wl_closure *closure, uint32_t flags,
                     count + 2, &ffi_type_void, ffi_types);
 
        implementation = target->implementation;
+       if (!implementation[opcode]) {
+               wl_log("listener function for opcode %u of %s is NULL\n",
+                       opcode, target->interface->name);
+               abort();
+       }
        ffi_call(&cif, implementation[opcode], NULL, ffi_args);
 }