payload: {"action":"created","issue":{"url":"https://api.github.com/repos/boostorg/optional/issues/72","repository_url":"https://api.github.com/repos/boostorg/optional","labels_url":"https://api.github.com/repos/boostorg/optional/issues/72/labels{/name}","comments_url":"https://api.github.com/repos/boostorg/optional/issues/72/comments","events_url":"https://api.github.com/repos/boostorg/optional/issues/72/events","html_url":"https://github.com/boostorg/optional/issues/72","id":433072692,"node_id":"MDU6SXNzdWU0MzMwNzI2OTI=","number":72,"title":"Uninitialized variable warning on gcc 8.3/release","user":{"login":"djarek","id":6125067,"node_id":"MDQ6VXNlcjYxMjUwNjc=","avatar_url":"https://avatars1.githubusercontent.com/u/6125067?v=4","gravatar_id":"","url":"https://api.github.com/users/djarek","html_url":"https://github.com/djarek","followers_url":"https://api.github.com/users/djarek/followers","following_url":"https://api.github.com/users/djarek/following{/other_user}","gists_url":"https://api.github.com/users/djarek/gists{/gist_id}","starred_url":"https://api.github.com/users/djarek/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/djarek/subscriptions","organizations_url":"https://api.github.com/users/djarek/orgs","repos_url":"https://api.github.com/users/djarek/repos","events_url":"https://api.github.com/users/djarek/events{/privacy}","received_events_url":"https://api.github.com/users/djarek/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2019-04-15T02:45:35Z","updated_at":"2019-04-16T17:40:29Z","closed_at":null,"author_association":"NONE","body":"gcc-8.3 in release mode reports an uninitialized variable warning in Boost.Beast:\r\nhttps://travis-ci.org/boostorg/beast/jobs/519772855#L1557\r\n\r\nThis is the variable whose member gcc considers to be uninitialized:\r\nhttps://github.com/boostorg/beast/blob/develop/include/boost/beast/websocket/impl/read.hpp#L667\r\n\r\nI've been able to determine that it's optional's `aligned_storage` (https://github.com/boostorg/optional/blob/develop/include/boost/optional/detail/optional_aligned_storage.hpp#L29) that is causing trouble, because removing `BOOST_MAY_ALIAS` and undefining `BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS` makes the warning go away.\r\n\r\nReproduces with the following settings:\r\n`./b2 libs/beast/test/beast/websocket variant=release toolset=gcc-8.3 link=static cxxstd=17 -j2`"},"comment":{"url":"https://api.github.com/repos/boostorg/optional/issues/comments/483773327","html_url":"https://github.com/boostorg/optional/issues/72#issuecomment-483773327","issue_url":"https://api.github.com/repos/boostorg/optional/issues/72","id":483773327,"node_id":"MDEyOklzc3VlQ29tbWVudDQ4Mzc3MzMyNw==","user":{"login":"djarek","id":6125067,"node_id":"MDQ6VXNlcjYxMjUwNjc=","avatar_url":"https://avatars1.githubusercontent.com/u/6125067?v=4","gravatar_id":"","url":"https://api.github.com/users/djarek","html_url":"https://github.com/djarek","followers_url":"https://api.github.com/users/djarek/followers","following_url":"https://api.github.com/users/djarek/following{/other_user}","gists_url":"https://api.github.com/users/djarek/gists{/gist_id}","starred_url":"https://api.github.com/users/djarek/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/djarek/subscriptions","organizations_url":"https://api.github.com/users/djarek/orgs","repos_url":"https://api.github.com/users/djarek/repos","events_url":"https://api.github.com/users/djarek/events{/privacy}","received_events_url":"https://api.github.com/users/djarek/received_events","type":"User","site_admin":false},"created_at":"2019-04-16T17:40:29Z","updated_at":"2019-04-16T17:40:29Z","author_association":"NONE","body":"The workaround is a bit hard to apply, because we use `optional` there to avoid declaring a variable in the context it's initialized in (because it's in a `switch`.. `case`). I'll see if I can find an alternative."}}
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