Use correct owner for summarizing effects in parent calls

Author: liufengyun

compiler/src/dotty/tools/dotc/transform/init/Checking.scala

@@ -93,6 +93,8 @@ object Checking {
     val cls = cdef.symbol.asClass
     val tpl = cdef.rhs.asInstanceOf[Template]
 
+    if state.parentsInited.contains(cls) then return
+
     // mark current class as initialized, required for linearization
     state.parentsInited += cls
 
@@ -101,7 +103,7 @@ object Checking {
         case vdef : ValDef =>
           val summary = Summarization.analyze(vdef.rhs)
           theEnv.summaryOf(cls).cacheFor(vdef.symbol, summary)
-          if (!vdef.symbol.is(Flags.Lazy)) {
+          if (!vdef.symbol.isOneOf(Flags.Lazy | Flags.Deferred)) {
             checkEffects(summary.effs)
             traceIndented(vdef.symbol.show + " initialized", init)
             state.fieldsInited += vdef.symbol
@@ -170,7 +172,7 @@ object Checking {
 
       case ref =>
         val cls = ref.tpe.classSymbol.asClass
-        if (!state.parentsInited.contains(cls) && cls.primaryConstructor.exists)
+        if (cls.primaryConstructor.exists)
           checkConstructor(cls.primaryConstructor, ref.tpe, ref)
     }
 

compiler/src/dotty/tools/dotc/transform/init/Summarization.scala

@@ -318,7 +318,7 @@ object Summarization {
               val ctor = cls.primaryConstructor
               val prefixEff =
                 if tref.prefix == NoPrefix then Effects.empty
-                else Summarization.analyze(tref.prefix, ref)(env.withOwner(ctor.owner)).effs
+                else Summarization.analyze(tref.prefix, ref).effs
 
               prefixEff +  MethodCall(ThisRef()(ref), ctor)(ref)
             }

tests/init/crash/matthias4.scala

@@ -0,0 +1,84 @@
+/*
+object A requires B {
+    B.X getX() {
+        return B.getX();
+    }
+    void setX(B.X x) {}
+}
+object B {
+    class X {}
+    X getX() {
+        return new X();
+    }
+    void setX(X x) {}
+}
+object C requires B {
+    object A;
+    void test() {
+        A.setX(B.getX());
+    }
+}
+*/
+
+trait _a extends AnyRef with _b {
+    val a: _a;
+    val A: A;
+    type A <: a.AObject;
+    trait AObject {
+        def getX(): B.X;
+        def setX(x: B.X): Unit;
+    }
+}
+trait a123 extends AnyRef with _a with _b {
+    val a: this.type = this;
+    val A: A = new A();
+    class A() extends AObject {
+        def getX(): B.X = B.getX();
+        def setX(x: B.X) = B.setX(x);
+    }
+}
+
+trait _b {
+    val b: _b;
+    val B: B;
+    type B <: b.BObject;
+    trait BObject {
+        type X;
+        def getX(): X;
+        def setX(x: X): Unit;
+    }
+}
+abstract class b() extends AnyRef with _b {
+    val b: this.type = this;
+    val B: B = new B();
+    class B() extends BObject {
+        class X() {}
+        def getX(): X = new X();
+        def setX(x: X) = ();
+    }
+}
+
+trait _m {
+    val m: _m;
+    val M: M;
+    type M <: m.MObject;
+    trait MObject {}
+}
+abstract class m() extends AnyRef with _m with _b {
+    val m: this.type = this;
+    val M: M = new M();
+    class M() extends MObject with a123 with Linker {
+        def test() = {
+            val x: B.X = B.getX();
+            A.setX(x);
+        }
+    }
+    trait Linker {
+        val b: m.this.b.type = m.this.b;
+        val B: m.this.B.type = m.this.B;
+        type B = m.this.B;
+        val m: m.this.m.type = m.this.m;
+        val M: m.this.M.type = m.this.M;
+        type M = m.this.M;
+    }
+}