Please describe the problem:
Emerging glib fails with the following messages:

 * QA Notice: Package has poor programming practices which may compile
 *            fine but exhibit random runtime failures.
 * gobject.c:2082: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * gobject.c:2088: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * gobject.c:2346: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * gobject.c:2383: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * gobject.c:2400: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * gparam.c:252: warning: dereferencing type-punned pointer will break strict-aliasing rules

 * Please do not file a Gentoo bug and instead report the above QA
 * issues directly to the upstream developers of this software.
 * Homepage: http://www.gtk.org/
 * 
 * ERROR: dev-libs/glib-2.18.4-r1 failed.
 * Call stack:
 *       misc-functions.sh, line 717:  Called install_qa_check
 *       misc-functions.sh, line 418:  Called die
 * The specific snippet of code:
 *   		[[ ${abort} == "yes" ]] && hasq stricter ${FEATURES} && die "poor code kills airplanes"
 *  The die message:
 *   poor code kills airplanes

Steps to reproduce:
emerge glib (2.18.4-r1) on Gentoo

Actual results:
See problem description above

Expected results:
A proper installation.

Does this happen every time?
Yes

Other information:
Gentoo 2008.0 on AMD64