{"action":"opened","issue":{"url":"https://api.github.com/repos/adobe-fonts/source-han-sans/issues/153","repository_url":"https://api.github.com/repos/adobe-fonts/source-han-sans","labels_url":"https://api.github.com/repos/adobe-fonts/source-han-sans/issues/153/labels{/name}","comments_url":"https://api.github.com/repos/adobe-fonts/source-han-sans/issues/153/comments","events_url":"https://api.github.com/repos/adobe-fonts/source-han-sans/issues/153/events","html_url":"https://github.com/adobe-fonts/source-han-sans/issues/153","id":155195493,"number":153,"title":"fwid substitution of ASCII tilde ","user":{"login":"dohyunkim","id":4328134,"avatar_url":"https://avatars.githubusercontent.com/u/4328134?v=3","gravatar_id":"","url":"https://api.github.com/users/dohyunkim","html_url":"https://github.com/dohyunkim","followers_url":"https://api.github.com/users/dohyunkim/followers","following_url":"https://api.github.com/users/dohyunkim/following{/other_user}","gists_url":"https://api.github.com/users/dohyunkim/gists{/gist_id}","starred_url":"https://api.github.com/users/dohyunkim/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dohyunkim/subscriptions","organizations_url":"https://api.github.com/users/dohyunkim/orgs","repos_url":"https://api.github.com/users/dohyunkim/repos","events_url":"https://api.github.com/users/dohyunkim/events{/privacy}","received_events_url":"https://api.github.com/users/dohyunkim/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-05-17T07:42:29Z","updated_at":"2016-05-17T07:42:29Z","closed_at":null,"body":"I have found this issue with Noto Sans CJK KR, but Source Han Sans K seems to have the same problem.\r\n\r\nWhile testing vertical typesetting, I encountered an unexpected glyph substitution regarding ASCII tilde.  It turned out that the lookup table of OpenType feature `fwid` is the culprit. So I have tested `fwid` substitution of all ASCII characters ranging from U+0021 to U+007E and confirmed that only tilde character is affected:\r\n\r\n![noto_fwid](https://cloud.githubusercontent.com/assets/4328134/15314535/74cc9686-1c4d-11e6-84a0-e3a6f83d9322.png)\r\n\r\nI don't think this is an expected outcome of `fwid` feature."}}