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[CLJ-1083] Incorrect ArityException message for function names containing -> Created: 09/Oct/12  Updated: 12/Apr/13

Status: Open
Project: Clojure
Component/s: None
Affects Version/s: Release 1.2, Release 1.3, Release 1.4, Release 1.5
Fix Version/s: Release 1.6

Type: Defect Priority: Minor
Reporter: Alex Nixon Assignee: Unassigned
Resolution: Unresolved Votes: 2
Labels: None

Attachments: File better-throw-arity-messages.diff    
Patch: Code
Approval: Vetted

 Description   

user=> (defn a->b [])
#'user/a->b
user=> (a->b 1)
ArityException Wrong number of args (1) passed to: user$a clojure.lang.AFn.throwArity (AFn.java:437)

Note that the reported function name in the stack trace is "user$a", where it should be "user$a->b" (or some mangled variant thereof?)

See discussion here: https://groups.google.com/d/msg/clojure/PVNoLclhhB0/_NWqyE0cPAUJ

 Comments   
Comment by Timothy Baldridge [ 26/Nov/12 10:27 AM ]

Fix for this defect.

Comment by Timothy Baldridge [ 26/Nov/12 10:30 AM ]

The throwArity now attempts to locate and call clojure.main/demunge. If it finds the function it invokes it and uses the returned string in the error. Otherwise it just throws the actual class name. This results in the following behaviour:

user=> (defn a->b [])
#'user/a->b
user=> (a->b 32)
ArityException Wrong number of args (1) passed to: user/a->b clojure.lang.AFn.throwArity (AFn.java:449)
user=>

Generated at Sat May 18 16:30:57 CDT 2013 using JIRA 4.4#649-r158309.