[ruby-core:50494] [ruby-trunk - Feature #7434] Allow caller_locations and backtrace_locations to receive negative params

Issue #7434 has been updated by sam.saffron (Sam Saffron).


Getting it on a clean rvm install of ruby-head with 

test.rb
caller_location(0,-1)

I hope my compile is correct, other stuff seems to work fine
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Feature #7434: Allow caller_locations and backtrace_locations to receive negative params
https://bugs.ruby-lang.org/issues/7434#change-34332

Author: sam.saffron (Sam Saffron)
Status: Closed
Priority: Normal
Assignee: ko1 (Koichi Sasada)
Category: core
Target version: next minor


Further to http://bugs.ruby-lang.org/issues/7051 

It would be nice if caller_locations and backtrace_locations has some parity with range apis.

pry(main)> [1,2,3][0..-2]
=> [1, 2]

Similarly: 

caller_locations(0,-2) # should strip the bottom frame 

This is actually quite important for diagnostics of Rails and other frameworks where the app code starts at a very deep frame. 

At the moment you are forced to materialize all frames just to discard. 







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