moved fir fo #11331 into separate pull request (#11400)

Author: rssh

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

@@ -2207,9 +2207,7 @@ object SymDenotations {
       if !myCompanion.exists then
         ensureCompleted()
       myCompanion
-
-    override def registeredCompanion_=(c: Symbol) = 
-      myCompanion = c 
+    override def registeredCompanion_=(c: Symbol) = { myCompanion = c }
 
     private var myNestingLevel = -1
 
@@ -2459,7 +2457,6 @@ object SymDenotations {
       !owner.isClass
       || owner.isRefinementClass
       || owner.is(Scala2x)
-      || denot.is(Synthetic)
       || owner.unforcedDecls.contains(denot.name, denot.symbol)
       || denot.isSelfSym
       || denot.isLocalDummy)

compiler/test/dotty/tools/dotc/BootstrappedOnlyCompilationTests.scala

@@ -29,7 +29,6 @@ class BootstrappedOnlyCompilationTests {
       compileFilesInDir("tests/pos-custom-args/semanticdb", defaultOptions.and("-Xsemanticdb")),
       compileDir("tests/pos-special/i7592", defaultOptions.and("-Yretain-trees")),
       compileDir("tests/pos-special/i11251", defaultOptions.and("-Ycheck:macros")),
-      compileDir("tests/pos-special/i11331", defaultOptions),
     ).checkCompile()
   }