{"action":"closed","issue":{"url":"https://api.github.com/repos/golang/go/issues/14831","repository_url":"https://api.github.com/repos/golang/go","labels_url":"https://api.github.com/repos/golang/go/issues/14831/labels{/name}","comments_url":"https://api.github.com/repos/golang/go/issues/14831/comments","events_url":"https://api.github.com/repos/golang/go/issues/14831/events","html_url":"https://github.com/golang/go/issues/14831","id":141093794,"number":14831,"title":"runtime: fatal error: MSpanList_Remove","user":{"login":"bits01","id":10517679,"avatar_url":"https://avatars.githubusercontent.com/u/10517679?v=3","gravatar_id":"","url":"https://api.github.com/users/bits01","html_url":"https://github.com/bits01","followers_url":"https://api.github.com/users/bits01/followers","following_url":"https://api.github.com/users/bits01/following{/other_user}","gists_url":"https://api.github.com/users/bits01/gists{/gist_id}","starred_url":"https://api.github.com/users/bits01/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bits01/subscriptions","organizations_url":"https://api.github.com/users/bits01/orgs","repos_url":"https://api.github.com/users/bits01/repos","events_url":"https://api.github.com/users/bits01/events{/privacy}","received_events_url":"https://api.github.com/users/bits01/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":{"login":"aclements","id":2688315,"avatar_url":"https://avatars.githubusercontent.com/u/2688315?v=3","gravatar_id":"","url":"https://api.github.com/users/aclements","html_url":"https://github.com/aclements","followers_url":"https://api.github.com/users/aclements/followers","following_url":"https://api.github.com/users/aclements/following{/other_user}","gists_url":"https://api.github.com/users/aclements/gists{/gist_id}","starred_url":"https://api.github.com/users/aclements/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aclements/subscriptions","organizations_url":"https://api.github.com/users/aclements/orgs","repos_url":"https://api.github.com/users/aclements/repos","events_url":"https://api.github.com/users/aclements/events{/privacy}","received_events_url":"https://api.github.com/users/aclements/received_events","type":"User","site_admin":false},"milestone":{"url":"https://api.github.com/repos/golang/go/milestones/36","html_url":"https://github.com/golang/go/milestones/Go1.6.1","labels_url":"https://api.github.com/repos/golang/go/milestones/36/labels","id":1589951,"number":36,"title":"Go1.6.1","description":"","creator":{"login":"ianlancetaylor","id":3194333,"avatar_url":"https://avatars.githubusercontent.com/u/3194333?v=3","gravatar_id":"","url":"https://api.github.com/users/ianlancetaylor","html_url":"https://github.com/ianlancetaylor","followers_url":"https://api.github.com/users/ianlancetaylor/followers","following_url":"https://api.github.com/users/ianlancetaylor/following{/other_user}","gists_url":"https://api.github.com/users/ianlancetaylor/gists{/gist_id}","starred_url":"https://api.github.com/users/ianlancetaylor/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ianlancetaylor/subscriptions","organizations_url":"https://api.github.com/users/ianlancetaylor/orgs","repos_url":"https://api.github.com/users/ianlancetaylor/repos","events_url":"https://api.github.com/users/ianlancetaylor/events{/privacy}","received_events_url":"https://api.github.com/users/ianlancetaylor/received_events","type":"User","site_admin":false},"open_issues":6,"closed_issues":18,"state":"open","created_at":"2016-02-18T03:45:44Z","updated_at":"2016-03-16T01:01:30Z","due_on":"2016-03-17T07:00:00Z","closed_at":null},"comments":8,"created_at":"2016-03-15T20:49:19Z","updated_at":"2016-03-16T01:01:30Z","closed_at":"2016-03-16T01:01:30Z","body":"Please answer these questions before submitting your issue. Thanks!\r\n\r\n1. What version of Go are you using (`go version`)?\r\ngo version go1.6 linux/amd64\r\n\r\n2. What operating system and processor architecture are you using (`go env`)?\r\nlinux/amd64, CentOS Linux release 7.1.1503 (Core)\r\n\r\n3. What did you do?\r\nIf possible, provide a recipe for reproducing the error.\r\nA complete runnable program is good.\r\nA link on play.golang.org is best.\r\n\r\nLong running process crashes with:\r\n```\r\nfailed MSpanList_Remove 0x7fb057ebfee8 0x7fb057fa2b30 0x8a2ed0 0x8a2ee0\r\nfatal error: MSpanList_Remove\r\n\r\nruntime stack:\r\nruntime.throw(0x758680, 0x10)\r\n\t/home/me/go/src/runtime/panic.go:530 +0x90\r\nruntime.(*mSpanList).remove(0x8a2ee0, 0x7fb057ebfee8)\r\n\t/home/me/go/src/runtime/mheap.go:911 +0x1ad\r\nruntime.(*mcentral).freeSpan(0x8a2ec0, 0x7fb057ebfee8, 0x10, 0xc82062e000, 0xc82062fe00, 0xc820018200, 0xc8200a0300)\r\n\t/home/me/go/src/runtime/mcentral.go:178 +0x156\r\nruntime.(*mspan).sweep(0x7fb057ebfee8, 0x300000000, 0xc800000001)\r\n\t/home/me/go/src/runtime/mgcsweep.go:319 +0x5e7\r\nruntime.sweepone(0x437db2)\r\n\t/home/me/go/src/runtime/mgcsweep.go:112 +0x23e\r\nruntime.gosweepone.func1()\r\n\t/home/me/go/src/runtime/mgcsweep.go:124 +0x21\r\nruntime.systemstack(0xc82001b500)\r\n\t/home/me/go/src/runtime/asm_amd64.s:291 +0x79\r\nruntime.mstart()\r\n\t/home/me/go/src/runtime/proc.go:1048\r\n\r\ngoroutine 18 [running]:\r\nruntime.systemstack_switch()\r\n\t/home/me/go/src/runtime/asm_amd64.s:245 fp=0xc820062758 sp=0xc820062750\r\nruntime.gosweepone(0x0)\r\n\t/home/me/go/src/runtime/mgcsweep.go:125 +0x3d fp=0xc820062780 sp=0xc820062758\r\nruntime.bgsweep(0xc8200aa000)\r\n\t/home/me/go/src/runtime/mgcsweep.go:66 +0xb6 fp=0xc8200627b8 sp=0xc820062780\r\nruntime.goexit()\r\n\t/home/me/go/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc8200627c0 sp=0xc8200627b8\r\ncreated by runtime.gcenable\r\n\t/home/me/go/src/runtime/mgc.go:191 +0x53\r\n```\r\n\r\n4. What did you expect to see?\r\nNot a crash\r\n\r\n\r\n5. What did you see instead?\r\nA crash\r\n\r\n"}}