File mpfr-3.1.2-patch11.diff of Package mpfr

diff -Naurd mpfr-3.1.2-a/src/strtofr.c mpfr-3.1.2-b/src/strtofr.c
--- mpfr-3.1.2-a/src/strtofr.c	2013-03-13 15:37:32.000000000 +0000
+++ mpfr-3.1.2-b/src/strtofr.c	2014-12-04 01:41:57.287791246 +0000
@@ -473,8 +473,10 @@
       /* prec bits corresponds to ysize limbs */
       ysize_bits = ysize * GMP_NUMB_BITS;
       /* and to ysize_bits >= prec > MPFR_PREC (x) bits */
-      y = MPFR_TMP_LIMBS_ALLOC (2 * ysize + 1);
-      y += ysize; /* y has (ysize+1) allocated limbs */
+      /* we need to allocate one more limb to work around bug
+         https://gmplib.org/list-archives/gmp-bugs/2013-December/003267.html */
+      y = MPFR_TMP_LIMBS_ALLOC (2 * ysize + 2);
+      y += ysize; /* y has (ysize+2) allocated limbs */
 
       /* pstr_size is the number of characters we read in pstr->mant
          to have at least ysize full limbs.