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Debugging in Kawa


How can I get more information about where the error
occurred when I run a program from Kawa's REPL?
...
Invalid parameter, was: null
java.lang.ClassCastException
        at atInteractiveLevel.lambda7(Unknown Source)
        at atInteractiveLevel.apply1(Unknown Source)
        at gnu.expr.ModuleMethod.apply1(ModuleMethod.java:85)
        at atInteractiveLevel.lambda1(Unknown Source)
        at atInteractiveLevel.apply2(Unknown Source)
        at gnu.expr.ModuleMethod.apply2(ModuleMethod.java:90)
        at atInteractiveLevel.lambda1(Unknown Source)
        at atInteractiveLevel.apply1(Unknown Source)
        at gnu.expr.ModuleMethod.apply1(ModuleMethod.java:85)
        at atInteractiveLevel.lambda1(Unknown Source)
        at atInteractiveLevel.apply0(Unknown Source)
        at gnu.expr.ModuleMethod.apply0(ModuleMethod.java:80)
        at atInteractiveLevel.lambda1$V(Unknown Source)
        at atInteractiveLevel.applyN(Unknown Source)
        at gnu.expr.ModuleBody.apply0(ModuleBody.java:120)
        at gnu.expr.ModuleMethod.apply0(ModuleMethod.java:80)
        at atInteractiveLevel.lambda1(Unknown Source)
        at atInteractiveLevel.apply1(Unknown Source)
        at gnu.expr.ModuleBody.applyN(ModuleBody.java:171)
        at gnu.expr.ModuleMethod.applyN(ModuleMethod.java:105)
        at gnu.mapping.Procedure.apply(Procedure.java:102)
        at gnu.mapping.CallContext.runUntilDone(CallContext.java:258)
        at gnu.expr.ModuleExp.evalModule(ModuleExp.java:188)
        at kawa.Shell.run(Shell.java:232)
        at kawa.Shell.run(Shell.java:180)
        at kawa.Shell.run(Shell.java:167)
        at kawa.Shell.run(Shell.java:154)
        at kawa.repl.main(repl.java:609)
#|kawa:3|# 


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