Merge pull request #4663 from dotty-staging/fix/unpickle-inline-twice

Don't unpickle the body of inline defs twice

Author: smarter

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

@@ -729,8 +729,15 @@ class TreeUnpickler(reader: TastyReader,
       val localCtx = localContext(sym)
 
       def readRhs(implicit ctx: Context) =
-        if (nothingButMods(end)) EmptyTree
-        else readLater(end, rdr => ctx => rdr.readTerm()(ctx.retractMode(Mode.InSuperCall)))
+        if (nothingButMods(end))
+          EmptyTree
+        else if (sym.isInlinedMethod)
+          // 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)
+          }
+        else
+          readLater(end, rdr => ctx => rdr.readTerm()(ctx.retractMode(Mode.InSuperCall)))
 
       def ValDef(tpt: Tree) =
         ta.assignType(untpd.ValDef(sym.name.asTermName, tpt, readRhs(localCtx)), sym)