From: petrik@...
Date: 2021-03-24T09:05:36+00:00
Subject: [ruby-core:102988] [Ruby master Feature#17743] Show argument types	in backtrace

Issue #17743 has been reported by p8 (Petrik de Heus).

----------------------------------------
Feature #17743: Show argument types in backtrace
https://bugs.ruby-lang.org/issues/17743

* Author: p8 (Petrik de Heus)
* Status: Open
* Priority: Normal
----------------------------------------
Given the following Ruby program:
``` ruby
def say_hi(person)
  puts message(person)
end

def message(person)
  "hi: #{person.name}"
end

say_hi(nil)
```

It would be helpful if the backtrace contained the types of the argumets:
```
Traceback (most recent call last):
	2: from hi.rb:9:in `<main>' called with NilClass
	1: from hi.rb:2:in `say_hi' called with NilClass
hi.rb:6:in `message': undefined method `name' for nil:NilClass (NoMethodError)
```

Inspired by the following Twitter thread: https://twitter.com/lzsthw/status/1374350046909628423




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