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Date: Tue, 22 Mar 2011 20:01:18 +0100
From: Georg Bauhaus <rm-host.bauhaus@maps.futureapps.de>
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Subject: Re: GNAT.Regpat problem.
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Date: 2011-03-22T20:01:19+01:00
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On 3/22/11 7:35 PM, Peter C. Chapin wrote:
> with Ada.Text_IO; use Ada.Text_IO;
> with GNAT.Regpat;
>
> procedure Check is
>     Matcher : GNAT.Regpat.Pattern_Matcher(10);
>
> begin
>     GNAT.Regpat.Compile(Matcher, "^[:space:]*xyzzy$");
>
> exception
>     when Storage_Error =>
>        Put_Line("Insufficient space in Pattern_Matcher");
>
> end Check;

Does -fstack-check (-fno-stack-check) have an effect?

FWIW, I get

$ ./check
raised SYSTEM.REGPAT.EXPRESSION_ERROR : Pattern_Matcher is too small

with GNAT GPL 2010 on Mac OS X.  This agrees with the source of
Compile in s-regpat.adb, which has

       if Size > Matcher.Size then
          raise Expression_Error with "Pattern_Matcher is too small";
       end if;

Looks like a documentation bug in any case.