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acf823cd78
* plugin/metrics: still need nil check for shutdown the second prometheus statement will trigger: (on control-C) [signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x94f45a] goroutine 25 [running]: github.com/coredns/coredns/plugin/metrics.(*Metrics).OnShutdown(0xc420252000, 0x0, 0x0) /home/miek/g/src/github.com/coredns/coredns/plugin/metrics/metrics.go:107 +0x2a github.com/coredns/coredns/plugin/metrics.(*Metrics).OnShutdown-fm(0x0, 0x0) /home/miek/g/src/github.com/coredns/coredns/plugin/metrics/setup.go:39 +0x2a github.com/mholt/caddy.(*Instance).ShutdownCallbacks(0xc4202c81e0, 0x0, 0x0, 0x0) /home/miek/g/src/github.com/mholt/caddy/caddy.go:164 +0xb3 github.com/mholt/caddy.allShutdownCallbacks(0x1743935, 0x8, 0x14a1b40) /home/miek/g/src/github.com/mholt/caddy/sigtrap.go:95 +0x10d github.com/mholt/caddy.executeShutdownCallbacks.func1() /home/miek/g/src/github.com/mholt/caddy/sigtrap.go:75 +0x8f sync.(*Once).Do(0x2256b80, 0xc42036df88) /home/miek/upstream/go/src/sync/once.go:44 +0xbe github.com/mholt/caddy.executeShutdownCallbacks(0x174033f, 0x6, 0x0) /home/miek/g/src/github.com/mholt/caddy/sigtrap.go:71 +0x73 github.com/mholt/caddy.trapSignalsCrossPlatform.func1.1() /home/miek/g/src/github.com/mholt/caddy/sigtrap.go:61 +0x36 created by github.com/mholt/caddy.trapSignalsCrossPlatform.func1 /home/miek * comments on why