[pcre-dev] BACKREFERENCE with (PCRE_UTF8|PCRE_CASELESS) is a…

Hello,

I built PCRE with SUPPORT_UTF8 and SUPPORT_UCP, and tried the following code.

re=pcre_compile("(\xc3\x80)\\1",PCRE_UTF8|PCRE_CASELESS,&err,&erroff,NULL);
rc=pcre_exec(re,NULL,"\xc3\x80\xc3\x80",4,0,0,ov,6); //(A) rc=2
rc=pcre_exec(re,NULL,"\xc3\x80\xc3\xa0",4,0,0,ov,6); //(B) rc=PCRE_ERROR_NOMATCH

\xc3\x80 is UTF-8 code of U+00C0 (LATIN CAPITAL LETTER A WITH GRAVE)
\xc3\xa0 is UTF-8 code of U+00E0 (LATIN SMALL LETTER A WITH GRAVE)

(B) is a unexpected result. Which of a bug or my misunderstanding is it?

Thanks,
Issaana