tree 6a934a03efa3a62d299f64c6cbe4bbaf9869f12c
parent 775cb933ecea6361717ef1def27b5d9e90c385fd
author Russ Cox <rsc@swtch.com> 1440532783 -0400
committer Russ Cox <rsc@swtch.com> 1440635800 +0000

mk: avoid infinite loop when targets are repeated

Fixes "mk -f /tmp/x.mk y x" or "mk -f /tmp/x.mk" where /tmp/x.mk is:

x y x: f
	echo hi

Change-Id: I7fa87dc4750c04fdba010b990c190722b432b333
Reviewed-on: https://plan9port-review.googlesource.com/1361
Reviewed-by: Russ Cox <rsc@swtch.com>