backport: re PR libfortran/86070 (gfortran.dg/fmt_zero_digits.f90 segmentation fault...

2018-06-09  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	Backport from trunk.
	PR libgfortran/86070
	* io/write_float.def (build_float_string): Initialize *len.

From-SVN: r261384

diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 7cda6b4c8bd138a6bd82cc6d798c4b8e7ccc96d2..403cb82c942f6ab7da7eae6a011c2a5a1098006d 100644 (file)
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,8 @@
+2018-06-09  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+       PR libgfortran/86070
+       * io/write_float.def (build_float_string): Initialize *len.
+
 2018-06-01  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
        Backport from trunk.

diff --git a/libgfortran/io/write_float.def b/libgfortran/io/write_float.def
index 7f0aa1d6143defd19489febb4633708ede521836..b4971fd335e883583a6ff62ba75516c8596137dc 100644 (file)
--- a/libgfortran/io/write_float.def
+++ b/libgfortran/io/write_float.def
@@ -135,6 +135,7 @@ build_float_string (st_parameter_dt *dtp, const fnode *f, char *buffer,
   w = f->u.real.w;
   d = f->u.real.d;
   p = dtp->u.p.scale_factor;
+  *len = 0;
 
   rchar = '5';