remote.c: remove BUG in show_push_unqualified_ref_name_error()

When "git push <remote> <src>:<dst>" does not spell out the
destination side of the ref fully, and when <src> is not given
as a reference but an object name, the code tries to give advice
messages based on the type of that object.

The type is determined by calling odb_read_object_info() and
signalled by its return value.  The code however reported a
programming error with BUG() when this function said that there
is no such object, which happens when the object name is given
as a full hexadecimal (if the object name is given as a partial
hexadecimal or an non-existing ref, the function would have died
without returning, so this BUG() wouldn't have triggered).  This
is wrong.  It is an ordinary end-user mistake to give an object
name that does not exist and treated as such.

Helped-by: Junio C Hamano <[email protected]>
Signed-off-by: Denton Liu <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Denton-L

remote.c

@@ -1204,8 +1204,7 @@ static void show_push_unqualified_ref_name_error(const char *dst_value,
 			 "'%s:refs/tags/%s'?"),
 		       matched_src_name, dst_value);
 	} else {
-		BUG("'%s' should be commit/tag/tree/blob, is '%d'",
-		    matched_src_name, type);
+		advise(_("The <src> part of the refspec is an oid that doesn't exist.\n"));
 	}
 }
 

t/t5516-fetch-push.sh

@@ -509,7 +509,7 @@ test_expect_success 'push ref expression with non-existent, incomplete dest' '
 
 '
 
-test_expect_failure 'push ref expression with non-existent oid src' '
+test_expect_success 'push ref expression with non-existent oid src' '
 
 	mk_test testrepo &&
 	test_must_fail git push testrepo $(test_oid 001):branch