--- /sys/src/9/pc/main.c	Sun Dec 17 12:32:49 2017+++ ../frontmods/pc/main.c	Fri Dec 22 02:26:47 2017@@ -157,6 +157,8 @@ 	p->pgrp = newpgrp(); 	p->egrp = smalloc(sizeof(Egrp)); 	p->egrp->ref = 1;+	p->sgrp = smalloc(sizeof(Sgrp));+	p->sgrp->ref = 1; 	p->fgrp = dupfgrp(nil); 	p->rgrp = newrgrp(); 	p->procmode = 0640;