{"action":"opened","issue":{"url":"https://api.github.com/repos/idaholab/moose/issues/12414","repository_url":"https://api.github.com/repos/idaholab/moose","labels_url":"https://api.github.com/repos/idaholab/moose/issues/12414/labels{/name}","comments_url":"https://api.github.com/repos/idaholab/moose/issues/12414/comments","events_url":"https://api.github.com/repos/idaholab/moose/issues/12414/events","html_url":"https://github.com/idaholab/moose/issues/12414","id":376430471,"node_id":"MDU6SXNzdWUzNzY0MzA0NzE=","number":12414,"title":"Moose::elementsIntersectedByLine can crash","user":{"login":"YaqiWang","id":6607496,"node_id":"MDQ6VXNlcjY2MDc0OTY=","avatar_url":"https://avatars1.githubusercontent.com/u/6607496?v=4","gravatar_id":"","url":"https://api.github.com/users/YaqiWang","html_url":"https://github.com/YaqiWang","followers_url":"https://api.github.com/users/YaqiWang/followers","following_url":"https://api.github.com/users/YaqiWang/following{/other_user}","gists_url":"https://api.github.com/users/YaqiWang/gists{/gist_id}","starred_url":"https://api.github.com/users/YaqiWang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/YaqiWang/subscriptions","organizations_url":"https://api.github.com/users/YaqiWang/orgs","repos_url":"https://api.github.com/users/YaqiWang/repos","events_url":"https://api.github.com/users/YaqiWang/events{/privacy}","received_events_url":"https://api.github.com/users/YaqiWang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-11-01T15:01:20Z","updated_at":"2018-11-01T15:01:20Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"## Rationale\r\n\r\nI had a vector postprocessor calling this function and noticed that it can crash.\r\n\r\n## Description\r\n\r\nI had a regular 2D mesh created by `GeneratedMesh` with `xmin=0,xmax=80,nx=8` and `ymin=0,ymax=80,ny=8`. When I try to call the function with starting point '0 30 0' and end point '80 30 0', I get the crash. lldb shows that it is due to a recursive call at `RayTracing.C:178`. I know this line is just on the boundary of elements, so the behavior may not be well defined. But it should at least throw a meaningful error message.\r\n\r\n## Impact\r\nA more robust function interface that could impact line sampling stuff."}}
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