[postgis-tickets] [PostGIS] #3907: gbox_to_string: snprintf warning

[PostGIS]

#3907: gbox_to_string: snprintf warning
------------------------+---------------------------
 Reporter:  Algunenano  |      Owner:  strk
     Type:  defect      |     Status:  new
 Priority:  low         |  Milestone:  PostGIS 2.2.6
Component:  liblwgeom   |    Version:  trunk
 Keywords:              |
------------------------+---------------------------
 GCC 7.2 warning in gbox_to_string:
 {{{
 g_box.c: In function 'gbox_to_string'
 g_box.c:421:21: warning: '))' directive output may be truncated writing 2
 bytes into a region of size between 0 and 105 [-Wformat-truncation=]
    snprintf(str, sz, "GBOX((%.8g,%.8g,%.8g,%.8g),(%.8g,%.8g,%.8g,%.8g))",
 gbox->xmin, gbox->ymin, gbox->zmin, gbox->mmin, gbox->xmax, gbox->ymax,
 gbox->zmax, gbox->mmax);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 In file included from /usr/include/stdio.h:862:0,
                  from liblwgeom_internal.h:40,
                  from g_box.c:29:
 /usr/include/bits/stdio2.h:64:10: note: '__builtin___snprintf_chk' output
 between 26 and 138 bytes into a destination of size 128
    return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         __bos (__s), __fmt, __va_arg_pack ());
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 }}}

 The destination buffer is set too small to handle the max size of the
 string so it might get truncated.

 Github PR: https://github.com/postgis/postgis/pull/165

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3907>
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