[ruby-core:94250] [Ruby master Bug#10011] Passing a string to Pathname#relative_path_from results in NoMethodError

Issue #10011 has been updated by jeremyevans0 (Jeremy Evans).

Status changed from Assigned to Closed

This was fixed between Ruby 2.5 and 2.6:

```
$ ruby25 -r pathname -e 'p Pathname.new("/usr/bin/cc").relative_path_from("/usr/bin")' 
Traceback (most recent call last):
        1: from -e:1:in `<main>'
/usr/local/lib/ruby/2.5/pathname.rb:508:in `relative_path_from': undefined method `cleanpath' for "/usr/bin":String (NoMethodError)
$ ruby26 -r pathname -e 'p Pathname.new("/usr/bin/cc").relative_path_from("/usr/bin")' 
#<Pathname:cc>
```

----------------------------------------
Bug #10011: Passing a string to Pathname#relative_path_from results in NoMethodError
https://bugs.ruby-lang.org/issues/10011#change-80565

* Author: jacknagel (Jack Nagel)
* Status: Closed
* Priority: Normal
* Assignee: akr (Akira Tanaka)
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-07-05 trunk 46706) [x86_64-darwin13]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
When a string is passed to Pathname#relative_path_from, a NoMethodError is raised.

```
irb(main):001:0> require "pathname"
=> true
irb(main):002:0> Pathname.new("/usr/bin/cc").relative_path_from Pathname.new("/usr/bin")
=> #<Pathname:cc>
irb(main):003:0> Pathname.new("/usr/bin/cc").relative_path_from("/usr/bin")
NoMethodError: undefined method `cleanpath' for "/usr/bin":String
	from /Users/jacknagel/.rubies/ruby-2.2.0/lib/ruby/2.2.0/pathname.rb:493:in `relative_path_from'
	from (irb):3
	from /Users/jacknagel/.rubies/ruby-2.2.0/bin/irb:11:in `<main>'
```

I think either converting the argument to a Pathname or raising TypeError would be acceptable here.



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