{"action":"created","comment":{"url":"https://api.github.com/repos/lampepfl/dotty/pulls/comments/75687320","id":75687320,"diff_hunk":"@@ -574,6 +563,32 @@ trait Applications extends Compatibility { self: Typer with Dynamic =>\n         if (!constrainResult(fun1.tpe.widen, proto.derivedFunProto(resultType = pt)))\n           typr.println(i\"result failure for $tree with type ${fun1.tpe.widen}, expected = $pt\")\n \n+      /** Type application where arguments come from prototype, and no implicits are inserted */\n+      def simpleApply(fun1: Tree, proto: FunProto)(implicit ctx: Context): Tree =\n+        methPart(fun1).tpe match {\n+          case funRef: TermRef =>\n+            val app =\n+              if (proto.allArgTypesAreCurrent())\n+                new ApplyToTyped(tree, fun1, funRef, proto.typedArgs, pt)\n+              else\n+                new ApplyToUntyped(tree, fun1, funRef, proto, pt)(argCtx(tree))\n+            convertNewGenericArray(ConstFold(app.result))","path":"src/dotty/tools/dotc/typer/Applications.scala","position":40,"original_position":40,"commit_id":"41b7ca73480e868d830b08db382debf049418973","original_commit_id":"41b7ca73480e868d830b08db382debf049418973","user":{"login":"odersky","id":795990,"avatar_url":"https://avatars.githubusercontent.com/u/795990?v=3","gravatar_id":"","url":"https://api.github.com/users/odersky","html_url":"https://github.com/odersky","followers_url":"https://api.github.com/users/odersky/followers","following_url":"https://api.github.com/users/odersky/following{/other_user}","gists_url":"https://api.github.com/users/odersky/gists{/gist_id}","starred_url":"https://api.github.com/users/odersky/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/odersky/subscriptions","organizations_url":"https://api.github.com/users/odersky/orgs","repos_url":"https://api.github.com/users/odersky/repos","events_url":"https://api.github.com/users/odersky/events{/privacy}","received_events_url":"https://api.github.com/users/odersky/received_events","type":"User","site_admin":false},"body":"As far as I can see, the code was moved out of typedApply, not duplicated.\r\n","created_at":"2016-08-22T14:27:36Z","updated_at":"2016-08-22T14:27:36Z","html_url":"https://github.com/lampepfl/dotty/pull/1460#discussion_r75687320","pull_request_url":"https://api.github.com/repos/lampepfl/dotty/pulls/1460","_links":{"self":{"href":"https://api.github.com/repos/lampepfl/dotty/pulls/comments/75687320"},"html":{"href":"https://github.com/lampepfl/dotty/pull/1460#discussion_r75687320"},"pull_request":{"href":"https://api.github.com/repos/lampepfl/dotty/pulls/1460"}}},"pull_request":{"url":"https://api.github.com/repos/lampepfl/dotty/pulls/1460","id":82101151,"html_url":"https://github.com/lampepfl/dotty/pull/1460","diff_url":"https://github.com/lampepfl/dotty/pull/1460.diff","patch_url":"https://github.com/lampepfl/dotty/pull/1460.patch","issue_url":"https://api.github.com/repos/lampepfl/dotty/issues/1460","number":1460,"state":"open","locked":false,"title":"Make sure arguments are evaluated in the correct typer state.","user":{"login":"odersky","id":795990,"avatar_url":"https://avatars.githubusercontent.com/u/795990?v=3","gravatar_id":"","url":"https://api.github.com/users/odersky","html_url":"https://github.com/odersky","followers_url":"https://api.github.com/users/odersky/followers","following_url":"https://api.github.com/users/odersky/following{/other_user}","gists_url":"https://api.github.com/users/odersky/gists{/gist_id}","starred_url":"https://api.github.com/users/odersky/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/odersky/subscriptions","organizations_url":"https://api.github.com/users/odersky/orgs","repos_url":"https://api.github.com/users/odersky/repos","events_url":"https://api.github.com/users/odersky/events{/privacy}","received_events_url":"https://api.github.com/users/odersky/received_events","type":"User","site_admin":false},"body":"\r\nThere's a tricky interaction with caching of typed arguments in FunProto types\r\nand backtracking using different typer states. We might end up with a typed\r\nargument that is evaluated in one typer state and that is used in another. The\r\nproblem is that the argument typing might have inserted type variables (maybe\r\nby adding polymorphic implicit views) that are not registered in the typer\r\nstate in which the application is finally typed. In that case we will see\r\nan \"orphan poly parameter\" in pickling.\r\n\r\nThe fix is to discard argument types if their typerstate is not committed\r\nto the one in which the application is finally typed. To apply the fix we\r\nneed to track\r\n\r\n - for typer states: whether or not it was committed, and what its parent is.\r\n - for function prototypes: the typer state in which an argument with cached type\r\n   was evaluated.\r\n\r\nTest case is t1756.scala, which produced an \"orphan poly parameter CI\" before.\r\n\r\nBased on #1459. First new commit is \"Don't force in isErroneous check\".\r\n\r\nReview by @smarter.\r\n","created_at":"2016-08-21T09:27:57Z","updated_at":"2016-08-22T14:27:36Z","closed_at":null,"merged_at":null,"merge_commit_sha":"3291a5f98bd80edb96e3ef494a17d2f905dfcf2e","assignee":null,"assignees":[],"milestone":null,"commits_url":"https://api.github.com/repos/lampepfl/dotty/pulls/1460/commits","review_comments_url":"https://api.github.com/repos/lampepfl/dotty/pulls/1460/comments","review_comment_url":"https://api.github.com/repos/lampepfl/dotty/pulls/comments{/number}","comments_url":"https://api.github.com/repos/lampepfl/dotty/issues/1460/comments","statuses_url":"https://api.github.com/repos/lampepfl/dotty/statuses/41b7ca73480e868d830b08db382debf049418973","head":{"label":"dotty-staging:fix-t1756","ref":"fix-t1756","sha":"41b7ca73480e868d830b08db382debf049418973","user":{"login":"dotty-staging","id":6998674,"avatar_url":"https://avatars.githubusercontent.com/u/6998674?v=3","gravatar_id":"","url":"https://api.github.com/users/dotty-staging","html_url":"https://github.com/dotty-staging","followers_url":"https://api.github.com/users/dotty-staging/followers","following_url":"https://api.github.com/users/dotty-staging/following{/other_user}","gists_url":"https://api.github.com/users/dotty-staging/gists{/gist_id}","starred_url":"https://api.github.com/users/dotty-staging/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotty-staging/subscriptions","organizations_url":"https://api.github.com/users/dotty-staging/orgs","repos_url":"https://api.github.com/users/dotty-staging/repos","events_url":"https://api.github.com/users/dotty-staging/events{/privacy}","received_events_url":"https://api.github.com/users/dotty-staging/received_events","type":"Organization","site_admin":false},"repo":{"id":17904384,"name":"dotty","full_name":"dotty-staging/dotty","owner":{"login":"dotty-staging","id":6998674,"avatar_url":"https://avatars.githubusercontent.com/u/6998674?v=3","gravatar_id":"","url":"https://api.github.com/users/dotty-staging","html_url":"https://github.com/dotty-staging","followers_url":"https://api.github.com/users/dotty-staging/followers","following_url":"https://api.github.com/users/dotty-staging/following{/other_user}","gists_url":"https://api.github.com/users/dotty-staging/gists{/gist_id}","starred_url":"https://api.github.com/users/dotty-staging/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotty-staging/subscriptions","organizations_url":"https://api.github.com/users/dotty-staging/orgs","repos_url":"https://api.github.com/users/dotty-staging/repos","events_url":"https://api.github.com/users/dotty-staging/events{/privacy}","received_events_url":"https://api.github.com/users/dotty-staging/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/dotty-staging/dotty","description":"Research 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