[Bug libfortran/85906] Conditional jump depends on uninitialized value in write_decimal / write_integer

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85906

--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
2018-05-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libgfortran/85906
        * io/write.c (write_integer): Initialise the fnode format to
        FMT_NONE, used for list directed write.
        (BUF_STACK_SZ): Bump default buffer size up to avoid allocs on
        small stuff.


--- trunk/libgfortran/io/write.c        2018/05/26 17:30:52     260793
+++ trunk/libgfortran/io/write.c        2018/05/26 18:22:18     260795
@@ -1348,6 +1348,7 @@
     }
   f.u.integer.w = width;
   f.u.integer.m = -1;
+  f.format = FMT_NONE;
   write_decimal (dtp, &f, source, kind, (void *) gfc_itoa);
 }

@@ -1465,7 +1466,7 @@

 /* Floating point helper functions.  */

-#define BUF_STACK_SZ 256
+#define BUF_STACK_SZ 384

 static int
 get_precision (st_parameter_dt *dtp, const fnode *f, const char *source, int
kind)