Running test failed

[cizixs]

When I try to run test, the following error occurred:

$ SUDO_PERMITTED=1 ./test
Building go-iptables...
Checking gofmt...
Running tests...
--- FAIL: TestChain (0.02s)
	iptables_test.go:107: testing iptables (hasWait=true, hasCheck=true)
	iptables_test.go:107: testing ip6tables (hasWait=true, hasCheck=true)
	iptables_test.go:107: testing iptables (hasWait=false, hasCheck=false)
	iptables_test.go:114: ListChains of Initial failed: exit status 4: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
--- FAIL: TestRules (0.02s)
	iptables_test.go:185: testing iptables (hasWait=true, hasCheck=true)
	iptables_test.go:185: testing ip6tables (hasWait=true, hasCheck=true)
	iptables_test.go:185: testing iptables (hasWait=false, hasCheck=false)
	iptables_test.go:205: ClearChain (of missing) failed: exit status 4: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
FAIL
coverage: 74.3% of statements
FAIL	github.com/coreos/go-iptables/iptables	0.050s

Running the failed command directly in terminal works well.

iptables version:

$ iptables --version
iptables v1.6.0

[gcmalloc]

linked to #24, which is a try to fix that.

[cizixs]

@gcmalloc Thanks, I'll keep following the PR.

[squeed]

Fixed in #38