segfault in gregexpr() - R-devel

Wed, Jan 30, 2008 6:49 PM #

Hi,

Tried with R 2.6 and R 2.7:

  > gregexpr("", "abc", fixed=TRUE)

   *** caught segfault ***
  address 0x1c09000, cause 'memory not mapped'

  Traceback:
   1: gregexpr("", "abc", fixed = TRUE)

  Possible actions:
  1: abort (with core dump, if enabled)
  2: normal R exit
  3: exit R without saving workspace
  4: exit R saving workspace
  Selection:

R version 2.7.0 Under development (unstable) (2008-01-29 r44238)
x86_64-unknown-linux-gnu

locale:
LC_CTYPE=en_US;LC_NUMERIC=C;LC_TIME=en_US;LC_COLLATE=en_US;LC_MONETARY=en_US;LC_MESSAGES=en_US;LC_PAPER=en_US;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US;LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base


Cheers,
H.

Seth Falcon

Wed, Jan 30, 2008 10:03 PM #

Hi Herve,

Thanks for the report.  I can reproduce this with latest R-devel.
perl=TRUE is also broken.  I have a patch which I am testing.  With
it, I get:

    > gregexpr("", "abc") 
    [[1]]
    [1] 1 2 3
    attr(,"match.length")
    [1] 0 0 0
    
    > gregexpr("", "abc", fixed=TRUE)
    [[1]]
    [1] 1 2 3
    attr(,"match.length")
    [1] 0 0 0
    
    > gregexpr("", "abc", perl=TRUE)
    [[1]]
    [1] 1 2 3
    attr(,"match.length")
    [1] 0 0 0


+ seth

Seth Falcon | seth at userprimary.net | blog: http://userprimary.net/user/

Seth Falcon

Thu, Jan 31, 2008 7:06 AM #

Hi again,

This should be fixed in latest svn.  Thanks for the report.

+ seth

Seth Falcon | seth at userprimary.net | blog: http://userprimary.net/user/

Hervé Pagès

Thu, Jan 31, 2008 1:21 PM #

Hi Seth,

Seth Falcon wrote:

That's great. Thanks!

H.