CODEWITHSUNDEEP
debuggingclojurestack-trace
Ben Kovitz
Ben Kovitz

Reputation: 5020

How can I see the function arguments in a Clojure stacktrace?

How can I see the arguments passed to the functions in a Clojure stacktrace?

For example, how could I see what arguments were passed to *get-item, *normalize-item-ref, outvalue-of, happiness, and nodestr in this stacktrace? It would be nice to see how the program got to the error rather than just the error.

ERROR in (this-test) (workspace.clj:330)
Uncaught exception, not in assertion.
expected: nil
  actual: java.lang.AssertionError: Assert failed: (item-or-item-ref? item-or-item-ref)
 at fargish.workspace$_STAR_get_item.invokeStatic (workspace.clj:330)
    fargish.workspace$_STAR_get_item.invoke (workspace.clj:330)
    fargish.workspace$_STAR_normalize_item_ref.invokeStatic (workspace.clj:365)
    fargish.workspace$_STAR_normalize_item_ref.invoke (workspace.clj:360)
    fargish.workspace$outvalue_of.invokeStatic (workspace.clj:815)
    fargish.workspace$outvalue_of.invoke (workspace.clj:810)
    fargish.workspace$outvalue_of.invokeStatic (workspace.clj:812)
    fargish.workspace$outvalue_of.invoke (workspace.clj:810)
    fargish.workspace$happiness.invokeStatic (workspace.clj:904)
    fargish.workspace$happiness.invoke (workspace.clj:902)
    fargish.workspace$nodestr.invokeStatic (workspace.clj:1039)
    fargish.workspace$nodestr.invoke (workspace.clj:1035)
    . . .

Upvotes: 1

Views: 217

Answers (2)

j_d
j_d

Reputation: 91

You can run sayid (http://bpiel.github.io/sayid/) on the namespace you are interested in. It will keep track of all function calls and arguments.

I think this is mostly useful for development/debugging. For production, the try-catch recommendation by amalloy above is probably best.

Upvotes: 2

amalloy
amalloy

Reputation: 91857

That information is not present in a stacktrace.

Upvotes: 4

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