diff -Naurd mpfr-3.1.3-a/PATCHES mpfr-3.1.3-b/PATCHES
--- mpfr-3.1.3-a/PATCHES	2016-02-15 15:10:03.358066124 +0000
+++ mpfr-3.1.3-b/PATCHES	2016-02-15 15:10:03.414066216 +0000
@@ -0,0 +1 @@
+jn
diff -Naurd mpfr-3.1.3-a/VERSION mpfr-3.1.3-b/VERSION
--- mpfr-3.1.3-a/VERSION	2015-10-29 13:47:46.763900609 +0000
+++ mpfr-3.1.3-b/VERSION	2016-02-15 15:10:03.414066216 +0000
@@ -1 +1 @@
-3.1.3-p5
+3.1.3-p6
diff -Naurd mpfr-3.1.3-a/src/jyn_asympt.c mpfr-3.1.3-b/src/jyn_asympt.c
--- mpfr-3.1.3-a/src/jyn_asympt.c	2015-06-19 19:55:09.000000000 +0000
+++ mpfr-3.1.3-b/src/jyn_asympt.c	2016-02-15 15:10:03.394066183 +0000
@@ -253,9 +253,9 @@
         break;
       if (diverge != 0)
         {
-          mpfr_set (c, z, r); /* will force inex=0 below, which means the
-                               asymptotic expansion failed */
-          break;
+          MPFR_ZIV_FREE (loop);
+          mpfr_clear (c);
+          return 0; /* means that the asymptotic expansion failed */
         }
       MPFR_ZIV_NEXT (loop, w);
     }
diff -Naurd mpfr-3.1.3-a/src/mpfr.h mpfr-3.1.3-b/src/mpfr.h
--- mpfr-3.1.3-a/src/mpfr.h	2015-10-29 13:47:46.759900692 +0000
+++ mpfr-3.1.3-b/src/mpfr.h	2016-02-15 15:10:03.410066210 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 3
-#define MPFR_VERSION_STRING "3.1.3-p5"
+#define MPFR_VERSION_STRING "3.1.3-p6"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.3-a/src/version.c mpfr-3.1.3-b/src/version.c
--- mpfr-3.1.3-a/src/version.c	2015-10-29 13:47:46.763900609 +0000
+++ mpfr-3.1.3-b/src/version.c	2016-02-15 15:10:03.414066216 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.3-p5";
+  return "3.1.3-p6";
 }
diff -Naurd mpfr-3.1.3-a/tests/tj0.c mpfr-3.1.3-b/tests/tj0.c
--- mpfr-3.1.3-a/tests/tj0.c	2015-06-19 19:55:10.000000000 +0000
+++ mpfr-3.1.3-b/tests/tj0.c	2016-02-15 15:10:03.394066183 +0000
@@ -99,6 +99,18 @@
   mpfr_j0 (y, x, MPFR_RNDN);
   MPFR_ASSERTN (! mpfr_nan_p (y) && mpfr_cmp_ui_2exp (y, 41, -11) == 0);
 
+  /* Bug reported by Fredrik Johansson on 19 Jan 2016 */
+  mpfr_set_prec (x, 53);
+  mpfr_set_str (x, "0x4.3328p+0", 0, MPFR_RNDN);
+  mpfr_set_prec (y, 2);
+  mpfr_j0 (y, x, MPFR_RNDD);
+  /* y should be -0.5 */
+  MPFR_ASSERTN (! mpfr_nan_p (y) && mpfr_cmp_si_2exp (y, -1, -1) == 0);
+  mpfr_set_prec (y, 3);
+  mpfr_j0 (y, x, MPFR_RNDD);
+  /* y should be -0.4375 */
+  MPFR_ASSERTN (! mpfr_nan_p (y) && mpfr_cmp_si_2exp (y, -7, -4) == 0);
+
   /* Case for which s = 0 in mpfr_jn */
   mpfr_set_prec (x, 44);
   mpfr_set_prec (y, 44);