dev-scheme/guile: fix ia64 segmentation fault

Closes: https://bugs.gentoo.org/613986
Package-Manager: Portage-2.3.13, Repoman-2.3.3

dev-scheme/guile/Manifest

@@ -1,3 +1,3 @@
 DIST guile-1.8.8.tar.gz 3956654 SHA256 c3471fed2e72e5b04ad133bbaaf16369e8360283679bcf19800bc1b381024050 SHA512 ede6feb90cd419d8763feb8c5169275490a653919573c4dfced025b74cf591072b3a10ffb9a3f6ee3fe7b0a0956ffcf434e0859b421455c8349cea56bf427db0 WHIRLPOOL 104810030b5dae16805595a5b398e5a7e600771b64b08d5ff686036e2f273dcec3829a16e4cdb1dbb9db5813f2e225476f83e0535a789bc570fc2fc15a76dbe2
 DIST guile-2.0.13.tar.gz 7808173 SHA256 ee8073c4582bb4f06412452fdf5dd185aae607441f1313c824f44bdd668b0bde SHA512 79fd5fda5064331eb687934ec3eaf07943f5b23bd05fbce23ab5ee3698864250b33746e33b8f074692b56f7b428dac42ed5d3f5b9dc17d171aa6dfadc1625b00 WHIRLPOOL 5f8b8e0f0e5fd2cde8fd4b1ca89ebe0231dd5f746945d71412a9d1ce57094013882972d9791511ef47e9bf1f2e9eff77a515dab8b4a6c0316122cb9ef49b5a7d
-DIST guile-2.0.14.tar.gz 7823099 SHA256 8aeb2f353881282fe01694cce76bb72f7ffdd296a12c7a1a39255c27b0dfe5f1 SHA512 d69c9bdf589fedcc227f3203012f6ed11c327cef3a0147d8e016fe276abecdb4272625efe1d0c7aa68219fe8f29bbced44089a4b479e4eafe01976c6b2b83633 WHIRLPOOL 3b355f40b47c940bf9330a3521447efd2da7c7c9c3615c208513e36fec937c06a9f307fb2c59d652c09e6e0e13e858d7ef7949efbe32d530431a7aace3d9a165
+DIST guile-2.0.14.tar.gz 7823099 BLAKE2B e7fa5a4ca19dc4adfcc151350b0ed4e211b8470b0d12f65451697a818c3139a4a5992a019bd213114748230cb15ec755d1af70d42b901230854915c0ee7b05de SHA512 d69c9bdf589fedcc227f3203012f6ed11c327cef3a0147d8e016fe276abecdb4272625efe1d0c7aa68219fe8f29bbced44089a4b479e4eafe01976c6b2b83633

dev-scheme/guile/files/guile-2.0.14-ia64-fix-crash-thread-context-switch.patch

@@ -0,0 +1,63 @@
+From f92888853439a8ded221f3423865c78de2a96a14 Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyfox@gentoo.org>
+Date: Sun, 5 Nov 2017 09:30:45 +0000
+Subject: ia64: Fix crash in thread context switch.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fixes <https://bugs.gnu.org/29151> and <https://bugs.gentoo.org/613986>.
+
+Backtrace looks like that:
+
+  Program terminated with signal SIGSEGV, Segmentation fault.
+  #0  0x200000000014a5c0 in scm_ia64_longjmp (JB=0x6000000000817020, VAL=1) at continuations.c:372
+  372                   t->pending_rbs_continuation->backing_store,
+  [Current thread is 1 (Thread 0x2000000000049340 (LWP 8190))]
+  (gdb) bt
+  #0  0x200000000014a5c0 in scm_ia64_longjmp (JB=0x6000000000817020, VAL=1) at continuations.c:372
+  #1  0x2000000000148e00 in scm_c_abort (vm=0x60000000000edea0, tag=0x6000000000795ba0, n=0, argv=0x60000fffff7f0ce0, cookie=-1) at control.c:239
+  #2  0x2000000000149070 in scm_at_abort (tag=0x6000000000795ba0, args=0x304) at control.c:258
+  (gdb) print t
+  $2 = (scm_i_thread *) 0x6000000000068000
+  (gdb) print t->pending_rbs_continuation
+  $3 = (scm_t_contregs *) 0xffeb
+
+The problem here is the value of 't->pending_rbs_continuation' pointer.
+It's supposed to poin to a register stack pointer or be NULL if not yet
+backed up.
+
+The problem is it is never initialized to NULL at creation time and
+contained garbage on stack. Sometimes people are lucky and have zeros
+on stack and guile works. But sometimes there is something and guile
+crashes.
+
+The fix is trivial: initialize 'pending_rbs_continuation = NULL'
+at thread registration time (the same way other threads are registered).
+
+Reported-by: Matt Turner
+
+* libguile/threads.c (guilify_self_1): Initialize pending_rbs_continuation
+to avoid crash on ia64.
+
+Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
+Signed-off-by: Ludovic Courtès <ludo@gnu.org>
+---
+ libguile/threads.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/libguile/threads.c b/libguile/threads.c
+index 9ceb5b8..770f62c 100644
+--- a/libguile/threads.c
++++ b/libguile/threads.c
+@@ -395,6 +395,7 @@ guilify_self_1 (struct GC_stack_base *base, int needs_unregister)
+   t.base = base->mem_base;
+ #ifdef __ia64__
+   t.register_backing_store_base = base->reg_base;
++  t.pending_rbs_continuation = 0;
+ #endif
+   t.continuation_root = SCM_EOL;
+   t.continuation_base = t.base;
+-- 
+cgit v1.0-41-gc330
+

dev-scheme/guile/guile-2.0.14-r3.ebuild

@@ -37,6 +37,7 @@ DOCS=( GUILE-VERSION HACKING README )
 PATCHES=(
 	"${FILESDIR}/${PN}-2-snarf.patch"
 	"${FILESDIR}/${P}-darwin.patch"
+	"${FILESDIR}/${P}-ia64-fix-crash-thread-context-switch.patch"
 )
 
 src_prepare() {