{"action":"created","issue":{"url":"https://api.github.com/repos/racket/drracket/issues/19","labels_url":"https://api.github.com/repos/racket/drracket/issues/19/labels{/name}","comments_url":"https://api.github.com/repos/racket/drracket/issues/19/comments","events_url":"https://api.github.com/repos/racket/drracket/issues/19/events","html_url":"https://github.com/racket/drracket/issues/19","id":115088399,"number":19,"title":"Debugger in ASL doesn't (always) show PITCH","user":{"login":"rfindler","id":399024,"avatar_url":"https://avatars.githubusercontent.com/u/399024?v=3","gravatar_id":"","url":"https://api.github.com/users/rfindler","html_url":"https://github.com/rfindler","followers_url":"https://api.github.com/users/rfindler/followers","following_url":"https://api.github.com/users/rfindler/following{/other_user}","gists_url":"https://api.github.com/users/rfindler/gists{/gist_id}","starred_url":"https://api.github.com/users/rfindler/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rfindler/subscriptions","organizations_url":"https://api.github.com/users/rfindler/orgs","repos_url":"https://api.github.com/users/rfindler/repos","events_url":"https://api.github.com/users/rfindler/events{/privacy}","received_events_url":"https://api.github.com/users/rfindler/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-11-04T16:11:56Z","updated_at":"2015-11-04T16:56:36Z","closed_at":null,"body":"This program, in the language-dialog version of ASL, shows too many frames when you repeatedly click \"step\" in the debugger (the calls to \"f\" stack up in the \"stack\" pane of the debugger):\r\n\r\n```\r\n(define (f x) (if (zero? x) x (f x)))\r\n(f 1)\r\n```\r\n\r\nThis program, in contrast:\r\n\r\n```\r\n(define (f x) (f x))\r\n(f 1)\r\n```\r\n\r\ndoes not have that problem."},"comment":{"url":"https://api.github.com/repos/racket/drracket/issues/comments/153791080","html_url":"https://github.com/racket/drracket/issues/19#issuecomment-153791080","issue_url":"https://api.github.com/repos/racket/drracket/issues/19","id":153791080,"user":{"login":"rfindler","id":399024,"avatar_url":"https://avatars.githubusercontent.com/u/399024?v=3","gravatar_id":"","url":"https://api.github.com/users/rfindler","html_url":"https://github.com/rfindler","followers_url":"https://api.github.com/users/rfindler/followers","following_url":"https://api.github.com/users/rfindler/following{/other_user}","gists_url":"https://api.github.com/users/rfindler/gists{/gist_id}","starred_url":"https://api.github.com/users/rfindler/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rfindler/subscriptions","organizations_url":"https://api.github.com/users/rfindler/orgs","repos_url":"https://api.github.com/users/rfindler/repos","events_url":"https://api.github.com/users/rfindler/events{/privacy}","received_events_url":"https://api.github.com/users/rfindler/received_events","type":"User","site_admin":false},"created_at":"2015-11-04T16:56:36Z","updated_at":"2015-11-04T16:56:36Z","body":"It appears to only be the debugger's annotation. Turning off errortrace in the language dialog and then clicking \"debug\" and \"go\" gives the wrong printouts for this program (showing growth):\r\n\r\n```\r\n#lang racket\r\n(define (f x)\r\n  (cond\r\n    [(zero? x) x]\r\n    [else\r\n     (with-continuation-mark 'x x\r\n       (begin0\r\n        (begin\r\n          (printf \"~s\\n\" (continuation-mark-set->list\r\n(current-continuation-marks) 'x))\r\n          (f (- x 1)))))]))\r\n(f 10)\r\n```"}}