[Rd] Bug report: POSIX regular expression doesn't match for somewhat higher values of upper bound

dietmar.schindler at manroland-web.com dietmar.schindler at manroland-web.com
Tue Apr 4 10:45:30 CEST 2017

Dear Sirs,


> regexpr('(.{1,2})\\1', 'foo')
[1] 2
[1] 2
[1] TRUE

yields the correct match, an incremented upper bound in

> regexpr('(.{1,3})\\1', 'foo')
[1] -1
[1] -1
[1] TRUE

incorrectly yields no match.

R versions tested:
2.11.1 on i486-pc-linux-gnu
2.15.1 on x86_64-pc-linux-gnu
3.2.1 on i386-w64-mingw32
3.2.1 on x86_64-w64-mingw32
3.3.3 on x86_64-w64-mingw32
Best regards,
Dietmar Schindler
manroland web systems GmbH -- Managing Director: Alexander Wassermann
Registered Office: Augsburg -- Trade Register: AG Augsburg -- HRB-No.: 26816 -- VAT: DE281389840

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