RT.load doesn't work when called by code that is on the bootstrap classpath


  • Type: Defect Defect
  • Status: Closed Closed
  • Priority: Minor Minor
  • Resolution: Completed
  • Affects Version/s: None
  • Fix Version/s: Release 1.3
  • Component/s: None
  • Labels:
  • Patch:
  • Approval:


RT.baseLoader assumes Compiler.getClass.getClassLoader will return a sane value. If Clojure is placed on the bootclasspath, it will return null.

Relying on baseLoader less may be possible; it looks like the ClassLoader/getSystemResource static method may get us the access we need to the bootstrap classloader, which would solve the problem I first noticed with using RT.load with the bootstrap classloader. However, there may be other issues beyond this.

More details at

I plan on investigating this further, but I've created this ticket to explain what I've discovered so far for posterity, etc.

Note that placing Clojure on the bootclasspath cuts its startup time in half; it's a measure that Charles Nutter of the JRuby project recommends.


Kevin Downey made changes -
Field Original Value New Value
Attachment fix-clj-637.diff [ 10268 ]
Kevin Downey made changes -
Patch Code
Rich Hickey made changes -
Fix Version/s Release.Next [ 10038 ]
Approval Vetted
Aaron Bedra made changes -
Waiting On technomancy
Aaron Bedra made changes -
Approval Vetted Screened
Waiting On technomancy
Stuart Halloway made changes -
Status Open [ 1 ] Closed [ 6 ]
Resolution Completed [ 1 ]


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