{"action":"created","issue":{"url":"https://api.github.com/repos/google/oss-fuzz/issues/1173","repository_url":"https://api.github.com/repos/google/oss-fuzz","labels_url":"https://api.github.com/repos/google/oss-fuzz/issues/1173/labels{/name}","comments_url":"https://api.github.com/repos/google/oss-fuzz/issues/1173/comments","events_url":"https://api.github.com/repos/google/oss-fuzz/issues/1173/events","html_url":"https://github.com/google/oss-fuzz/issues/1173","id":298010442,"number":1173,"title":"Ocassionally line number in stacktrace is 0","user":{"login":"alex","id":772,"avatar_url":"https://avatars2.githubusercontent.com/u/772?v=4","gravatar_id":"","url":"https://api.github.com/users/alex","html_url":"https://github.com/alex","followers_url":"https://api.github.com/users/alex/followers","following_url":"https://api.github.com/users/alex/following{/other_user}","gists_url":"https://api.github.com/users/alex/gists{/gist_id}","starred_url":"https://api.github.com/users/alex/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alex/subscriptions","organizations_url":"https://api.github.com/users/alex/orgs","repos_url":"https://api.github.com/users/alex/repos","events_url":"https://api.github.com/users/alex/events{/privacy}","received_events_url":"https://api.github.com/users/alex/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2018-02-17T14:56:15Z","updated_at":"2018-02-17T21:26:11Z","closed_at":"2018-02-17T21:18:08Z","author_association":"CONTRIBUTOR","body":"I'm not sure where this bug exists, it might be a bug in ASAN or the symbolizer, filing here as a first step :-)\r\n\r\nIf you look at https://oss-fuzz.com/v2/testcase-detail/5638304557957120?noredirect=1 at frame #5 you can see it points to line 0. I'm not sure what the cause might be, none of the potential locations are in macros or anything else that I might expect to cause problems."},"comment":{"url":"https://api.github.com/repos/google/oss-fuzz/issues/comments/366472642","html_url":"https://github.com/google/oss-fuzz/issues/1173#issuecomment-366472642","issue_url":"https://api.github.com/repos/google/oss-fuzz/issues/1173","id":366472642,"user":{"login":"kcc","id":1789297,"avatar_url":"https://avatars0.githubusercontent.com/u/1789297?v=4","gravatar_id":"","url":"https://api.github.com/users/kcc","html_url":"https://github.com/kcc","followers_url":"https://api.github.com/users/kcc/followers","following_url":"https://api.github.com/users/kcc/following{/other_user}","gists_url":"https://api.github.com/users/kcc/gists{/gist_id}","starred_url":"https://api.github.com/users/kcc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kcc/subscriptions","organizations_url":"https://api.github.com/users/kcc/orgs","repos_url":"https://api.github.com/users/kcc/repos","events_url":"https://api.github.com/users/kcc/events{/privacy}","received_events_url":"https://api.github.com/users/kcc/received_events","type":"User","site_admin":false},"created_at":"2018-02-17T21:26:10Z","updated_at":"2018-02-17T21:26:10Z","author_association":"CONTRIBUTOR","body":"just use addr2line and llbm-symbolizer on the binary with the affected PC. \r\nIf addr2line also shows bogus value, it's likely a bug in emitted dwarf. \r\nIf llvm-symbolizer shows the bogus value and addr2line shows a good one, most likely the LLVM dwarf reader is wrong. \r\n(You can also dump dwarf with elfdump and some such, but I never remember the incantations)\r\n"}}
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