{"action":"created","issue":{"url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/26","repository_url":"https://api.github.com/repos/larsbrinkhoff/lbForth","labels_url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/26/labels{/name}","comments_url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/26/comments","events_url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/26/events","html_url":"https://github.com/larsbrinkhoff/lbForth/issues/26","id":186119657,"number":26,"title":"Undefined behaviour in C target","user":{"login":"larsbrinkhoff","id":775050,"avatar_url":"https://avatars.githubusercontent.com/u/775050?v=3","gravatar_id":"","url":"https://api.github.com/users/larsbrinkhoff","html_url":"https://github.com/larsbrinkhoff","followers_url":"https://api.github.com/users/larsbrinkhoff/followers","following_url":"https://api.github.com/users/larsbrinkhoff/following{/other_user}","gists_url":"https://api.github.com/users/larsbrinkhoff/gists{/gist_id}","starred_url":"https://api.github.com/users/larsbrinkhoff/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/larsbrinkhoff/subscriptions","organizations_url":"https://api.github.com/users/larsbrinkhoff/orgs","repos_url":"https://api.github.com/users/larsbrinkhoff/repos","events_url":"https://api.github.com/users/larsbrinkhoff/events{/privacy}","received_events_url":"https://api.github.com/users/larsbrinkhoff/received_events","type":"User","site_admin":false},"labels":[{"id":14249163,"url":"https://api.github.com/repos/larsbrinkhoff/lbForth/labels/bug","name":"bug","color":"fc2929","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2016-10-30T06:19:49Z","updated_at":"2016-11-01T17:25:21Z","closed_at":null,"body":"@pipcet [reported](https://github.com/larsbrinkhoff/lbForth/commit/f8ca65d9cabf9b5c5f8fc40f435afda9cbf19a53#commitcomment-19622549) a case of undefined behaviour in the C target.  This may affect `SP@` and `SP!`.\n"},"comment":{"url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/comments/257631414","html_url":"https://github.com/larsbrinkhoff/lbForth/issues/26#issuecomment-257631414","issue_url":"https://api.github.com/repos/larsbrinkhoff/lbForth/issues/26","id":257631414,"user":{"login":"pipcet","id":4129208,"avatar_url":"https://avatars.githubusercontent.com/u/4129208?v=3","gravatar_id":"","url":"https://api.github.com/users/pipcet","html_url":"https://github.com/pipcet","followers_url":"https://api.github.com/users/pipcet/followers","following_url":"https://api.github.com/users/pipcet/following{/other_user}","gists_url":"https://api.github.com/users/pipcet/gists{/gist_id}","starred_url":"https://api.github.com/users/pipcet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pipcet/subscriptions","organizations_url":"https://api.github.com/users/pipcet/orgs","repos_url":"https://api.github.com/users/pipcet/repos","events_url":"https://api.github.com/users/pipcet/events{/privacy}","received_events_url":"https://api.github.com/users/pipcet/received_events","type":"User","site_admin":false},"created_at":"2016-11-01T17:25:21Z","updated_at":"2016-11-01T17:25:21Z","body":"That fix makes it obvious that side effects happen before the deref, so that works for me.\r\n\r\nI still have a very slight preference for `: sp@ SP @ ;`, as in https://github.com/pipcet/lbForth/compare/master...pipcet:change-sp-fetch?expand=1, but that would require all ports to change, and it'd make the code uglier for ports that don't touch the stack pointer..."}}
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