Clojure

• Type: Defect
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: Release 1.7
• Fix Version/s: Release 1.9
• Component/s: None
• Labels:

  • collections

Couldn't find whether it was brought up earlier, but it seems that empty? predicate is broken for transient collections

user=> (empty? (transient []))
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.PersistentVector$TransientVector  clojure.lang.RT.seqFrom (RT.java:528)

user=> (empty? (transient ()))
ClassCastException clojure.lang.PersistentList$EmptyList cannot be cast to clojure.lang.IEditableCollection  clojure.core/transient (core.clj:3209)

user=> (empty? (transient {}))
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.PersistentArrayMap$TransientArrayMap  clojure.lang.RT.seqFrom (RT.java:528)

user=> (empty? (transient #{}))
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.PersistentHashSet$TransientHashSet  clojure.lang.RT.seqFrom (RT.java:528)

The workaround is to use (zero? (count (transient ...))) check instead.

• Assignee:

  Unassigned

  Reporter:

  Leonid Bogdanov

• Created:

  26/Dec/15 5:36 PM

  Updated:

  19/Aug/16 10:46 AM