bugKawa - Bugs: bug #36413, Unused function in module

 
 

bug #36413: Unused function in module

Submitter:  Helmut Eller <ellerh>
Submitted:  Sun 06 May 2012 12:23:44 PM UTC
   
 
Category:  Code generation Severity:  3 - Normal
Item Group:  Compile-time exception Status:  Fixed
Privacy:  Public Assigned to:  bothner
Open/Closed:  Closed
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Wed 13 Jun 2012 08:20:30 PM UTC, comment #1: 

I checked in a fix to not generate methods for an unused function.
I checked in this fix and a testcase.  Thanks!

Per Bothner <bothner>
Group administrator
Sun 06 May 2012 12:23:44 PM UTC, original submission:  

This code

(module-export foo)

(define (foo) (foo))

(define (bar x)
  (let ((y '()))
    (set! y x)
    y))


causes a NullPointerException:

shell> kawa --version -C x.scm
Kawa 1.12 (revision 7219M)
Copyright (C) 2011 Per Bothner
(compiling x.scm to x)
x.scm:7:9
x.scm:6:9: warning - no use of bar
x.scm:9: internal error while compiling x.scm
java.lang.NullPointerException
        at gnu.expr.Declaration.load(Declaration.java:376)
        at gnu.expr.ReferenceExp.compile(ReferenceExp.java:169)
        at gnu.expr.Expression.compileNotePosition(Expression.java:156)
        at gnu.expr.Expression.compileWithPosition(Expression.java:127)
        at gnu.expr.BeginExp.compile(BeginExp.java:153)
        at gnu.expr.Expression.compileNotePosition(Expression.java:156)
        at gnu.expr.Expression.compileWithPosition(Expression.java:127)
        at gnu.expr.LetExp.compile(LetExp.java:193)
        at gnu.expr.Expression.compileNotePosition(Expression.java:156)
        at gnu.expr.Expression.compileWithPosition(Expression.java:142)
        at gnu.expr.LambdaExp.compileBody(LambdaExp.java:1670)
        at gnu.expr.LambdaExp.compileAsMethod(LambdaExp.java:1646)
        at gnu.expr.LambdaExp.compileEnd(LambdaExp.java:587)
        at gnu.expr.Compilation.generateBytecode(Compilation.java:2075)
        at gnu.expr.Compilation.process(Compilation.java:1952)
        at gnu.expr.ModuleInfo.loadByStages(ModuleInfo.java:305)
        at gnu.expr.ModuleInfo.loadByStages(ModuleInfo.java:290)
        at kawa.repl.compileFiles(repl.java:817)
        at kawa.repl.processArgs(repl.java:444)
        at kawa.repl.main(repl.java:863)
[Exit 255]



Helmut Eller <ellerh>

 

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Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-06-13 bothner CategoryNone Code generation
        Item GroupNone Compile-time exception
        StatusNone Fixed
        Assigned toNone bothner
        Open/ClosedOpen Closed

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