Try default implicits only if method has default parameters

Author: odersky

src/dotty/tools/dotc/typer/Typer.scala

@@ -1458,9 +1458,15 @@ class Typer extends Namer with TypeAssigner with Applications with Implicits wit
               // have influenced the context, binding variables, but later ones
               // might fail. In that case the constraint needs to be reset.
               ctx.typerState.constraint = constr
-              tryEither
-                { implicit ctx => typed(untpd.Apply(untpd.TypedSplice(tree), Nil), pt) }
-                { (_, _) => ctx.error(failure(), tree.pos.endPos); tree }
+              def issueError = {
+                ctx.error(failure(), tree.pos.endPos)
+                tree
+              }
+              if (tree.symbol.hasDefaultParams)
+                tryEither
+                  { implicit ctx => typed(untpd.Apply(untpd.TypedSplice(tree), Nil), pt) }
+                  { (_, _) => issueError }
+              else issueError
           }
         }
         if ((pt eq WildcardType) || original.isEmpty) addImplicitArgs