diff --git a/src/vim9compile.c b/src/vim9compile.c
index 696301f..d8119c5 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -913,6 +913,7 @@
 	}
     }
 
+    update_has_breakpoint(ufunc);
     compile_type = COMPILE_TYPE(ufunc);
 #ifdef FEAT_PROFILE
     // If the outer function is profiled, also compile the nested function for
@@ -2579,6 +2580,13 @@
 	new_def_function = TRUE;
     }
 
+    if ((ufunc->uf_flags & FC_CLOSURE) && outer_cctx == NULL)
+    {
+	semsg(_(e_compiling_closure_without_context_str),
+						   printable_func_name(ufunc));
+	return FAIL;
+    }
+
     ufunc->uf_def_status = UF_COMPILING;
 
     CLEAR_FIELD(cctx);