Re: bug#6214: 23.1; json-read-string crashes emacs with long string

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+From: Chong Yidong <cyd@stupidchicken.com>\r
+To: Stefan Monnier <monnier@iro.umontreal.ca>\r
+Subject: Re: bug#6214: 23.1; json-read-string crashes emacs with long string\r
+References: <87pr0t5h1q.fsf@yoom.home.cworth.org>\r
+       <87fx1pkrsh.fsf@stupidchicken.com> <87tymzv6ga.fsf@steelpick.2x.cz>\r
+       <878w4afozw.fsf@stupidchicken.com> <87sk2hbq3s.fsf@steelpick.2x.cz>\r
+       <8739ug3mrr.fsf@stupidchicken.com> <87r5i02uo7.fsf@steelpick.2x.cz>\r
+       <874oeuv4le.fsf@stupidchicken.com> <87fwye2sxt.fsf@steelpick.2x.cz>\r
+       <87pqxhmg0i.fsf@stupidchicken.com>\r
+Date: Tue, 17 Aug 2010 12:27:25 -0400\r
+In-Reply-To: <87pqxhmg0i.fsf@stupidchicken.com> (Chong Yidong's message of\r
+       "Tue, 17 Aug 2010 11:10:37 -0400")\r
+Message-ID: <87sk2dxl01.fsf@stupidchicken.com>\r
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+Cc: 6214@debbugs.gnu.org, Notmuch mailing list <notmuch@notmuchmail.org>\r
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+\r
+Chong Yidong <cyd@stupidchicken.com> writes:\r
+\r
+> Hmm, there is a problem, though.  If we attempt to avoid a stack\r
+> overflow in `apply' by using the heap rather than the stack to store\r
+> large numbers of arguments, those arguments are invisible to the\r
+> stack-marking gargbage collector.\r
+\r
+Never mind, I got confused.  SAFE_ALLOCA uses record_unwind_protect, so\r
+it's gc safe.\r