Re: segfault with xapian 1.3.1

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+From: David Bremner <david@tethera.net>\r
+To: "Jason A. Donenfeld" <Jason@zx2c4.com>, notmuch ML\r
+       <notmuch@notmuchmail.org>\r
+Subject: Re: segfault with xapian 1.3.1\r
+In-Reply-To: <87txhypzvz.fsf@zancas.localnet>\r
+References:\r
+ <CAHmME9q3H2KKBRb_VU4Rr-pc+2qR=uPxiX8YPBFE4N0DaiidAA@mail.gmail.com>\r
+       <87txhypzvz.fsf@zancas.localnet>\r
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+Date: Thu, 05 Sep 2013 22:22:42 -0300\r
+Message-ID: <87r4d2pwv1.fsf@zancas.localnet>\r
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+Cc: Olly Betts <olly@survex.com>\r
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+\r
+David Bremner <david@tethera.net> writes:\r
+\r
+>\r
+> I managed to duplicate this problem on Debian testing by rebuilding\r
+> Olly's packages (https://launchpad.net/~ojwb/+archive/xapian-1.3) for\r
+> sid and running the following script in the ./test subdirectory\r
+\r
+Olly wrote on  IRC:\r
+\r
+> bremner: ok, 1.2 explicitly no-oped skip_to() on an iterator at_end on\r
+> trunk that code has been rewritten without that explicit check, and\r
+> the iterator internals are NULL then i think restoring the check is\r
+> reasonable, though I'm not sure if we actually promise that's defined\r
+> behaviour if you want to work with 1.3.1, then checking against the\r
+> end iterator before calling skip_to() will work for any version\r
+\r
+So, now we know what to fix.\r
+\r
+d\r