From: "ko1 (Koichi Sasada) via ruby-core" <ruby-core@...>
Date: 2024-02-13T09:42:36+00:00
Subject: [ruby-core:116693] [Ruby master Feature#19117] Include the method owner in backtraces, not just the method name

Issue #19117 has been updated by ko1 (Koichi Sasada).


Do we need quotes?

From comment #28


```
./test.rb:10:in `Integer#+': String can't be coerced into Integer (TypeError)
	from ./test.rb:10:in `block in Concrete.oops'
	from ./test.rb:3:in `Abstract#oops'
	from ./test.rb:16:in `block in Concrete#oops'
	from <internal:kernel>:90:in `Kernel#tap'
	from ./test.rb:15:in `Concrete#oops'
	from ./test.rb:10:in `Concrete.oops'
	from ./test.rb:21:in `Method#call'
	from ./test.rb:21:in `<main>'
```

vs


```
./test.rb:10:in Integer#+: String can't be coerced into Integer (TypeError)
	from ./test.rb:10:in block in Concrete.oops
	from ./test.rb:3:in Abstract#oops
	from ./test.rb:16:in block in Concrete#oops
	from <internal:kernel>:90:in Kernel#tap
	from ./test.rb:15:in Concrete#oops
	from ./test.rb:10:in Concrete.oops
	from ./test.rb:21:in Method#call
	from ./test.rb:21:in <main>
```

For example, python's case;


```
$ python3
Python 3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> def foo(a):
...     a + 10
...
>>> foo("str")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in foo
TypeError: can only concatenate str (not "int") to str
```

----------------------------------------
Feature #19117: Include the method owner in backtraces, not just the method name
https://bugs.ruby-lang.org/issues/19117#change-106705

* Author: byroot (Jean Boussier)
* Status: Open
* Priority: Normal
* Target version: 3.4
----------------------------------------
```
module Foo
  class Bar
    def inspect
      1 + '1'
    end
  end
end

p Foo::Bar.new
```

This code produce the following backtrace:


```
/tmp/foo.rb:4:in `+': String can't be coerced into Integer (TypeError)
	from /tmp/foo.rb:4:in `inspect'
	from /tmp/foo.rb:9:in `p'
	from /tmp/foo.rb:9:in `<main>'
```

This works, but on large codebases and large backtraces the method name isn't always all that revealing, most of the time you need to open many of the locations listed in the backtrace to really understand what is going on.

I propose that we also include the owner name:

```
/tmp/foo.rb:4:in `Integer#+': String can't be coerced into Integer (TypeError)
	from /tmp/foo.rb:4:in `Foo::Bar#inspect'
	from /tmp/foo.rb:9:in `Kernel#p'
	from /tmp/foo.rb:9:in `<main>'
```

I believe that in many case it would allow to much better understand the backtrace without having to jump back and forth between it and the source code.

This is inspired by @ivoanjo 's `backtracie` gem: https://github.com/ivoanjo/backtracie



-- 
https://bugs.ruby-lang.org/
 ______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/