Index: src/runtime/selector.m
==================================================================
--- src/runtime/selector.m
+++ src/runtime/selector.m
@@ -58,10 +58,13 @@
 				return;
 			}
 
 			hash++;
 		}
+
+		if (hash >= last)
+			ERROR("Selector slots exhausted!");
 	}
 
 	objc_sparsearray_set(selectors, hash, (void*)sel->name);
 	rsel->uid = hash;
 }