Don't try to unpickle RHS of deferred inline methods

Author: odersky

compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala

@@ -774,7 +774,7 @@ class TreeUnpickler(reader: TastyReader,
       def readRhs(implicit ctx: Context): LazyTree =
         if (nothingButMods(end))
           EmptyTree
-        else if (sym.isInlineMethod)
+        else if sym.isInlineMethod && !sym.is(Deferred) then
           // The body of an inline method is stored in an annotation, so no need to unpickle it again
           new Trees.Lazy[Tree] {
             def complete(implicit ctx: Context) = typer.Inliner.bodyToInline(sym)

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

@@ -2336,7 +2336,8 @@ class Typer extends Namer
             val newCtx = if (ctx.owner.isTerm && adaptCreationContext(mdef)) ctx
               else ctx.withNotNullInfos(initialNotNullInfos)
             typed(mdef)(using newCtx) match {
-              case mdef1: DefDef if !Inliner.bodyToInline(mdef1.symbol).isEmpty =>
+              case mdef1: DefDef
+              if mdef1.symbol.is(Inline, butNot = Deferred) && !Inliner.bodyToInline(mdef1.symbol).isEmpty =>
                 buf ++= inlineExpansion(mdef1)
                   // replace body with expansion, because it will be used as inlined body
                   // from separately compiled files - the original BodyAnnotation is not kept.