bug: after erring on undefined component type, system is reported to load successfully

[73budden .]

Version 3.1.5,

Example system definition:

(defsystem :s3
  :components
  ((cl-user::cons "file-name-does-not-matter")
   ))
;; eof

I try to load it, it says:

"Error while trying to load definition for system s3 from
pathname c:/clcon/lp/test/s3.asd:
   don't recognize component type CONS"

Then I try to load it another time, it says:

T