--- /dev/null
+(define-module (lang elisp primitives buffers)
+ #:use-module (ice-9 optargs)
+ #:use-module (lang elisp internals fset))
+
+(fset 'buffer-disable-undo
+ (lambda* (#:optional buffer)
+ 'unimplemented))
+
+(fset 're-search-forward
+ (lambda* (regexp #:optional bound noerror count)
+ 'unimplemented))
+
+(fset 're-search-backward
+ (lambda* (regexp #:optional bound noerror count)
+ 'unimplemented))
+