fix diag results remains

Author: sumneko

script/provider/diagnostic.lua

@@ -303,6 +303,11 @@ function m.doDiagnostic(uri, isScopeDiag)
         end
         m.cache[uri] = full
 
+        if not files.exists(uri) then
+            m.clear(uri)
+            return
+        end
+
         proto.notify('textDocument/publishDiagnostics', {
             uri = uri,
             version = version,
@@ -345,6 +350,11 @@ function m.resendDiagnostic(uri)
         return
     end
 
+    if not files.exists(uri) then
+        m.clear(uri)
+        return
+    end
+
     local version = files.getVersion(uri)
 
     proto.notify('textDocument/publishDiagnostics', {