Created attachment 189872 [details]
Letharion's failing build for gtksourceview

Compiling gtksourceview and running the test suite on Gentoo Linux fails.
I'm attaching brief output for a quick glance below, and attaching the entire build log to the issue.

make[1]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/po'
Making check in docs
make[1]: Entering directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs'
Making check in reference
make[2]: Entering directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs/reference'
make[2]: Nothing to be done for `check'.
make[2]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs/reference'
make[2]: Entering directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs'
make[2]: Nothing to be done for `check-am'.
make[2]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs'
make[1]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/docs'
Making check in tests
make[1]: Entering directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/tests'
make  check-TESTS
make[2]: Entering directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/tests'
Xlib:  extension "RANDR" missing on display ":1".
/LanguageManager/get-default: OK
/LanguageManager/get-language: **
GtkSourceView:ERROR:test-languagemanager.c:25:test_get_language: assertion failed: (ids != NULL)
/bin/sh: line 5: 31745 Aborted                 ${dir}$tst
FAIL: test-languagemanager
Xlib:  extension "RANDR" missing on display ":1".
/PrintCompositor/buffer-ref: OK
/PrintCompositor/buffer-view-ref: OK
PASS: test-printcompositor
==============================================================================
1 of 2 tests failed
Please report to http://bugzilla.gnome.org/enter_bug.cgi?product=gtksourceview
==============================================================================
make[2]: *** [check-TESTS] Error 1
make[2]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/tests'
make[1]: *** [check-am] Error 2
make[1]: Leaving directory `/var/tmp/portage/x11-libs/gtksourceview-2.10.5-r1/work/gtksourceview-2.10.5/tests'
make: *** [check-recursive] Error 1