diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-06-30 15:17:53.417270314 +0000
@@ -0,0 +1 @@
+vasprintf
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/VERSION	2014-06-30 15:17:53.413270206 +0000
@@ -1 +1 @@
-3.1.2-p9
+3.1.2-p10
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-06-30 15:17:53.413270206 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p9"
+#define MPFR_VERSION_STRING "3.1.2-p10"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/vasprintf.c mpfr-3.1.2-b/src/vasprintf.c
--- mpfr-3.1.2-a/src/vasprintf.c	2013-11-15 00:51:49.267334408 +0000
+++ mpfr-3.1.2-b/src/vasprintf.c	2014-06-30 15:17:53.377269231 +0000
@@ -884,14 +884,18 @@
            first digit, we want the exponent for radix two and the decimal
            point AFTER the first digit. */
         {
-          MPFR_ASSERTN (exp > MPFR_EMIN_MIN /4); /* possible overflow */
+          /* An integer overflow is normally not possible since MPFR_EXP_MIN
+             is twice as large as MPFR_EMIN_MIN. */
+          MPFR_ASSERTN (exp > (MPFR_EXP_MIN + 3) / 4);
           exp = (exp - 1) * 4;
         }
       else
         /* EXP is the exponent for decimal point BEFORE the first digit, we
            want the exponent for decimal point AFTER the first digit. */
         {
-          MPFR_ASSERTN (exp > MPFR_EMIN_MIN); /* possible overflow */
+          /* An integer overflow is normally not possible since MPFR_EXP_MIN
+             is twice as large as MPFR_EMIN_MIN. */
+          MPFR_ASSERTN (exp > MPFR_EXP_MIN);
           --exp;
         }
     }
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-06-30 15:17:53.413270206 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p9";
+  return "3.1.2-p10";
 }
diff -Naurd mpfr-3.1.2-a/tests/tsprintf.c mpfr-3.1.2-b/tests/tsprintf.c
--- mpfr-3.1.2-a/tests/tsprintf.c	2013-11-15 00:51:49.267334408 +0000
+++ mpfr-3.1.2-b/tests/tsprintf.c	2014-06-30 15:17:53.377269231 +0000
@@ -1184,6 +1184,69 @@
   check_emax_aux (MPFR_EMAX_MAX);
 }
 
+static void
+check_emin_aux (mpfr_exp_t e)
+{
+  mpfr_t x;
+  char *s1, s2[256];
+  int i;
+  mpfr_exp_t emin;
+  mpz_t ee;
+
+  MPFR_ASSERTN (e >= LONG_MIN);
+  emin = mpfr_get_emin ();
+  set_emin (e);
+
+  mpfr_init2 (x, 16);
+  mpz_init (ee);
+
+  mpfr_setmin (x, e);
+  mpz_set_si (ee, e);
+  mpz_sub_ui (ee, ee, 1);
+
+  i = mpfr_asprintf (&s1, "%Ra", x);
+  MPFR_ASSERTN (i > 0);
+
+  gmp_snprintf (s2, 256, "0x1p%Zd", ee);
+
+  if (strcmp (s1, s2) != 0)
+    {
+      printf ("Error in check_emin_aux for emin = %ld\n", (long) e);
+      printf ("Expected %s\n", s2);
+      printf ("Got      %s\n", s1);
+      exit (1);
+    }
+
+  mpfr_free_str (s1);
+
+  i = mpfr_asprintf (&s1, "%Rb", x);
+  MPFR_ASSERTN (i > 0);
+
+  gmp_snprintf (s2, 256, "1p%Zd", ee);
+
+  if (strcmp (s1, s2) != 0)
+    {
+      printf ("Error in check_emin_aux for emin = %ld\n", (long) e);
+      printf ("Expected %s\n", s2);
+      printf ("Got      %s\n", s1);
+      exit (1);
+    }
+
+  mpfr_free_str (s1);
+
+  mpfr_clear (x);
+  mpz_clear (ee);
+  set_emin (emin);
+}
+
+static void
+check_emin (void)
+{
+  check_emin_aux (-15);
+  check_emin_aux (mpfr_get_emin ());
+  check_emin_aux (MPFR_EMIN_MIN);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -1203,6 +1266,7 @@
   decimal ();
   mixed ();
   check_emax ();
+  check_emin ();
 
 #if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
   locale_da_DK ();