Initialize context with NoOpProfiler to prevent null pointer exceptions and to match the store non-nullable signature

Author: WojciechMazur

compiler/src/dotty/tools/dotc/core/Contexts.scala

@@ -766,6 +766,7 @@ object Contexts {
           .updated(settingsStateLoc, settingsGroup.defaultState)
           .updated(notNullInfosLoc, Nil)
           .updated(compilationUnitLoc, NoCompilationUnit)
+          .updated(profilerLoc, Profiler.NoOp)
       c._searchHistory = new SearchRoot
       c._gadtState = GadtState(GadtConstraint.empty)
       c

compiler/src/dotty/tools/dotc/profile/Profiler.scala

@@ -32,6 +32,8 @@ object Profiler {
       new RealProfiler(reporter)
     }
 
+  final def NoOp: Profiler = NoOpProfiler
+
   private[profile] val emptySnap: ProfileSnap = ProfileSnap(0, "", 0, 0, 0, 0, 0, 0, 0, 0)
 }