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Frozen String error message different from MRI #1907

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alexfalkowski opened this Issue Aug 15, 2014 · 1 comment

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alexfalkowski commented Aug 15, 2014

Hi Team,

There seems to be a bit of inconsistency with the error messages when we try to modify frozen object.

In Ruby MRI:

s = String.new.freeze
s.upcase!

RuntimeError: can't modify frozen String

In JRuby:

s = String.new.freeze
s.upcase!

RuntimeError: can't modify frozen string

The difference here is the casing.

If we have a custom class

class Test
  attr_accessor :name
end

In Ruby MRI:

t = Test.new.freeze
t.name = 'Test'

RuntimeError: can't modify frozen Test

In JRuby:

t = Test.new.freeze
t.name = 'Test'

RuntimeError: can't modify frozen

In this example we are missing the name of the class.

alexfalkowski added a commit to alexfalkowski/rfunk that referenced this issue Aug 15, 2014

alexfalkowski added a commit to alexfalkowski/rfunk that referenced this issue Aug 15, 2014

alexfalkowski added a commit to alexfalkowski/rfunk that referenced this issue Aug 15, 2014

alexfalkowski added a commit to alexfalkowski/rfunk that referenced this issue Aug 15, 2014

@rtyler

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rtyler commented Aug 7, 2015

This is incorrect still in JRuby 1.7.21 but has been fixed in 9k:

[5] pry(main)> class Test
[5] pry(main)*   attr_accessor :name
[5] pry(main)* end  
=> nil
[6] pry(main)> t = Test.new.freeze
=> #<Test:0x5652f555>
[7] pry(main)> t.name = 'derp'
RuntimeError: can't modify frozen Test
from (pry):9:in `evaluate_ruby'
[8] pry(main)> RUBY_PLATFORM
=> "java"
[9] pry(main)> RUBY_VERSION
=> "2.2.0"
[10] pry(main)> 

So I'm going to go ahead and close it out.

@rtyler rtyler closed this Aug 7, 2015

@enebo enebo added this to the JRuby 9.0.1.0 milestone Aug 20, 2015

@nirvdrum nirvdrum changed the title Frozen Frozen String error message different from MRI Sep 2, 2015

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