[erlang-questions] Erlang tracing

Magnus Henoch magnus@REDACTED
Mon Sep 21 13:25:18 CEST 2015

I had a vaguely related idea the other day.  When you trace a 
function that takes an anonymous function as an argument, it's 
printed like this:

8> lists:all(foo:foo(3), [1, 2]).
(<0.33.0>) call lists:all(#Fun<foo.0.99124727>,[1,2])
(<0.33.0>) returned from lists:all/2 -> false

That tells you that anonymous function number 0 in module foo is 
passed as an argument.  It would be convenient to have the 0 be 
the line number where the anonymous function is defined instead, 
so you can quickly figure out exactly which function is being 
passed, in case your module creates several different ones.


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