[ruby-core:62641] [ruby-trunk - Bug #4225] IO.foreach should only accept string arguments

Issue #4225 has been updated by Daniel Berger.


Still happening as of 2.1.2.

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Bug #4225: IO.foreach should only accept string arguments
https://bugs.ruby-lang.org/issues/4225#change-46777

* Author: Daniel Berger
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: 
* ruby -v: ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-darwin8.11.1]
* Backport: 
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=begin
 It looks like the IO.foreach method doesn't check its argument type first if no block is provided:
 
 fh = File.new('somefile.txt')
 
 IO.foreach(fh.fileno) # Or, IO.foreach(999999999)
 => #<Enumerable::Enumerator:0x110b0d4>
 
 IO.foreach(fh.fileno){ |line| p line }
 TypeError: can't convert Fixnum into String
 
 I'd flip these two lines in io.c:
 
 RETURN_ENUMERATOR(self, argc, argv);
 SafeStringValue(fname);
 
 Otherwise, what am I enumerating?
=end




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