[MacRuby-devel] [MacRuby] #249: Attempting to modify instances of NSString or NSArray causes crash
#249: Attempting to modify instances of NSString or NSArray causes crash
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Reporter: jes...@… | Owner: lsansone...@…
Type: defect | Status: new
Priority: blocker | Milestone:
Component: MacRuby |Keywords:
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Creating an instance of NSString or NSArray, and then attempting to modify
it, causes a crash in MacRuby 0.4 (built from source, revision 1541):
{{{
$ macirb
irb(main):001:0> str = NSString.stringWithString 'a'
=> "a"
irb(main):002:0> str << 'b'
(irb):2: [BUG] Bus Error
MacRuby version 0.4 (ruby 1.9.1) [universal-darwin9.5, x86_64]
}}}
{{{
$ macirb
irb(main):001:0> arr = NSArray.arrayWithObject 'a'
=> ["a"]
irb(main):002:0> arr << 'b'
/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/irb.rb:302:
[BUG] Segmentation fault
MacRuby version 0.4 (ruby 1.9.1) [universal-darwin9.5, x86_64]
}}}
(Yes, I know that NSString and NSArray are immutable types, but a bus
error or segfault seems a bit harsh.)
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Ticket URL:
MacRuby
Re: [MacRuby-devel] [MacRuby] #249: Attempting to modify instances of NSString or NSArray causes crash
#249: Attempting to modify instances of NSString or NSArray causes crash
-+--
Reporter: jes...@… | Owner: lsansone...@…
Type: defect | Status: new
Priority: blocker | Milestone:
Component: MacRuby |Keywords:
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Comment(by lsansone...@…):
Thanks for the report, this is likely a bug in the YARV #<< optimization.
We do check for mutability before doing any destructive operations.
{{{
$ macruby -e 's=NSString.string; s.strip!'
-e:1:in `strip!': can't modify immutable string (RuntimeError)
from -e:1:in `'
}}}
Also, I noticed that the check doesn't work for NSArray in 64-bit.
{{{
$ arch -i386 macruby -e "a = NSArray.array; a.clear"
-e:1:in `clear': can't modify frozen/immutable array (RuntimeError)
from -e:1:in `'
$ arch -x86_64 macruby -e "a = NSArray.array; a.clear"
}}}
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Ticket URL:
MacRuby
