From: Zachary Scott <zachary@...>
Date: 2012-08-14T03:12:58+09:00
Subject: [ruby-core:47156] Re: [ruby-trunk - Bug #6849][Open] Psych.load_file throws TypeError for empty file

On ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]

I can reproduce this using Psych.load_file.

However, when I try Psych#load as the implementation suggests[1]
leaving out the utf stuff "bom|utf-8"; it returns false:

$irb
require 'psych'
`touch empty.yml`
File.open('empty.yml', 'r') { |f| Psych.load(f,'empty file') }
#=> false

Something is up with the File.open mode used by psych:

$irb
`touch empty.file`
File.open('empty.file', 'r:bom|utf-8') { |f| puts f }
    TypeError: no implicit conversion from nil to integer



1: https://github.com/tenderlove/psych/blob/master/lib/psych.rb#L299



On Thu, Aug 9, 2012 at 2:54 PM, BrandonMathis (Brandon Mathis)
<BeMathis@gmail.com> wrote:
>
> Issue #6849 has been reported by BrandonMathis (Brandon Mathis).
>
> ----------------------------------------
> Bug #6849: Psych.load_file throws TypeError for empty file
> https://bugs.ruby-lang.org/issues/6849
>
> Author: BrandonMathis (Brandon Mathis)
> Status: Open
> Priority: Normal
> Assignee:
> Category:
> Target version:
> ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.0.0]
>
>
> When parsing an empty file via Psych.load_file:
> TypeError: no implicit conversion from nil to integer
> I would expect that an empty hash or array would be returned.
>
> This, more directly, relates to parsing YAML documents using YAML.load_file
>
>
> --
> http://bugs.ruby-lang.org/
>