From dwinsemius at comcast.net  Wed Sep 22 06:20:23 2010
From: dwinsemius at comcast.net (David Winsemius)
Date: Wed, 22 Sep 2010 00:20:23 -0400
Subject: [Rd] Crash report: regexpr("a{2-}", "")
In-Reply-To: <AANLkTik=5K-2yiOrgx7bUp-vta2vx4pEg7b=BdpK2D6U@mail.gmail.com>
References: <AANLkTinxcpVMmZ6w6vRL74Xa8fSFUcVFV2t6t3sKszAG@mail.gmail.com>
	<B5067C6B-B806-4632-A58B-9F293CD52D3F@comcast.net>
	<AANLkTik=5K-2yiOrgx7bUp-vta2vx4pEg7b=BdpK2D6U@mail.gmail.com>
Message-ID: <DB03C938-7BA3-4464-BF2C-506E33C9549B@comcast.net>


On Sep 22, 2010, at 12:12 AM, Henrik Bengtsson wrote:

> David's post made me realize that I got the sub()/gsub() lines wrong.
> It should be:
>
> regexpr("a{2-}", "")
> sub("a{2-}", "", "")
> gsub("a{2-}", "", "")
>

Still no crash on a Mac. Did you mean to include a third argument to  
regexpr() as you did for sub and gsub?

-- 
David.
> Either way, the crash is there, at on least Windows and Linux.
>
> /Henrik
>
> On Tue, Sep 21, 2010 at 8:43 PM, David Winsemius <dwinsemius at comcast.net 
> > wrote:
>>
>> On Sep 21, 2010, at 11:04 PM, Henrik Bengtsson wrote:
>>
>>> Each of the following calls crash ("core dumps") R (R --vanilla) on
>>> various versions and OSes:
>>>
>>> regexpr("a{2-}", "")
>>> sub("a{2-}", "")
>>> gsub("a{2-}", "")
>>>
>>>
>>> EXAMPLES:
>>>
>>>> sessionInfo()
>>>
>>> R version 2.11.1 Patched (2010-09-16 r52949)
>>> Platform: i386-pc-mingw32 (32-bit)
>>> ...
>>>>
>>>> regexpr("a{2-}", "")
>>>
>>> Assertion failed: iter->max == -1 || iter->max == 1, file
>>> tre-compile.c, line 1825
>>> This application has requested the Runtime to terminate it in an  
>>> unusual
>>> way.
>>> Please contact the application's support team for more information.
>>>
>>>> sessionInfo()
>>>
>>> R version 2.12.0 Under development (unstable) (2010-09-14 r52910)
>>> Platform: i386-pc-mingw32/i386 (32-bit)
>>> ...
>>>>
>>>> regexpr("a{2-}", "")
>>>
>>> Assertion failed: iter->max == -1 || iter->max == 1, file
>>> tre-compile.c, line 1825
>>> This application has requested the Runtime to terminate it in an  
>>> unusual
>>> way.
>>> Please contact the application's support team for more information.
>>>
>>>
>>>> sessionInfo()
>>>
>>> R version 2.11.0 Patched (2010-05-09 r51960)
>>> x86_64-unknown-linux-gnu
>>> ...
>>>>
>>>> regexpr("a{2-}", "")
>>>
>>> R: tre-compile.c:1825: tre_ast_to_tnfa: Assertion `iter->max == -1  
>>> ||
>>> iter->max == 1' failed.
>>> Aborted
>>
>> Not a problem in reasonably current Mac with 64bit GUI:
>>> regexpr("a{2-}", "")
>> [1] 1
>> attr(,"match.length")
>> [1] 0
>>> sub("a{2-}", "")
>> Error in is.character(x) : 'x' is missing
>>> gsub("a{2-}", "")
>> Error in is.character(x) : 'x' is missing
>>
>> R version 2.11.1 Patched (2010-08-26 r52822)
>> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
>> [R.app GUI 1.35 (5612) x86_64-apple-darwin9.8.0]
>>
>> --
>> David.
>>>
>>>
>>> /Henrik
>>>
>>> ______________________________________________
>>> R-devel at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>



[Rd] Crash report: regexpr("a{2-}", "")
David Winsemius