Please describe the problem:
make  all-recursive
make[1]: Entering directory `/home/uzytkownik/Projects/contributions/libgee'
Making all in gee
make[2]: Entering directory `/home/uzytkownik/Projects/contributions/libgee/gee'
 cd .. && /bin/sh /home/uzytkownik/Projects/contributions/libgee/missing --run automake-1.10 --gnu  gee/Makefile
 cd .. && /bin/sh ./config.status gee/Makefile depfiles
config.status: creating gee/Makefile
config.status: executing depfiles commands
make[2]: Leaving directory `/home/uzytkownik/Projects/contributions/libgee/gee'
make[2]: Entering directory `/home/uzytkownik/Projects/contributions/libgee/gee'
/usr/bin/valac -C -H gee.h --library gee-1.0 --gir Gee-1.0.gir abstractcollection.vala abstractlist.vala abstractmap.vala arraylist.vala collection.vala functions.vala hashmap.vala hashset.vala iterable.vala iterator.vala linkedlist.vala list.vala map.vala readonlycollection.vala readonlylist.vala readonlymap.vala readonlyset.vala set.vala treemap.vala treeset.vala
hashmap.vala:111.8-111.13: error: Address-of operator not supported for this expression
			if (&value != null) {
			    ^^^^^^
treemap.vala:228.7-228.12: error: Address-of operator not supported for this expression
		if (&value != null) {
		    ^^^^^^
Compilation failed: 2 error(s), 0 warning(s)
make[2]: *** [gee.vala.stamp] Error 1
make[2]: Leaving directory `/home/uzytkownik/Projects/contributions/libgee/gee'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/uzytkownik/Projects/contributions/libgee'
make: *** [all] Error 2


Steps to reproduce:
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Actual results:


Expected results:


Does this happen every time?


Other information: