Fix searching serialized classes package contains multiple fragments

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/IncrementalJsCompilerRunnerTestGenerated.java

@@ -296,6 +296,12 @@ public class IncrementalJsCompilerRunnerTestGenerated extends AbstractIncrementa
             doTest(fileName);
         }
 
+        @TestMetadata("functionReferencingClass")
+        public void testFunctionReferencingClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/");
+            doTest(fileName);
+        }
+
         @TestMetadata("independentClasses")
         public void testIndependentClasses() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/independentClasses/");

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunnerTestGenerated.java

@@ -296,6 +296,12 @@ public class IncrementalJvmCompilerRunnerTestGenerated extends AbstractIncrement
             doTest(fileName);
         }
 
+        @TestMetadata("functionReferencingClass")
+        public void testFunctionReferencingClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/");
+            doTest(fileName);
+        }
+
         @TestMetadata("independentClasses")
         public void testIndependentClasses() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/independentClasses/");

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/ClassDeserializer.kt

@@ -55,13 +55,8 @@ class ClassDeserializer(private val components: DeserializationComponents) {
         }
         else {
             val fragments = components.packageFragmentProvider.getPackageFragments(classId.packageFqName)
-            assert(fragments.size == 1) { "There should be exactly one package: $fragments, class id is $classId" }
-
-            val fragment = fragments.single()
-            if (fragment is DeserializedPackageFragment) {
-                // Similarly, verify that the containing package has information about this class
-                if (!fragment.hasTopLevelClass(classId.shortClassName)) return null
-            }
+            val fragment = fragments.firstOrNull { it !is DeserializedPackageFragment || it.hasTopLevelClass(classId.shortClassName) }
+                           ?: return null
 
             components.createContext(
                     fragment, nameResolver,

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/DeserializedClassDataFinder.kt

@@ -22,9 +22,12 @@ import org.jetbrains.kotlin.serialization.ClassDataWithSource
 
 class DeserializedClassDataFinder(private val packageFragmentProvider: PackageFragmentProvider) : ClassDataFinder {
     override fun findClassData(classId: ClassId): ClassDataWithSource? {
-        val packageFragment =
-                packageFragmentProvider.getPackageFragments(classId.packageFqName).singleOrNull()
-                        as? DeserializedPackageFragment ?: return null
-        return packageFragment.classDataFinder.findClassData(classId)
+        val packageFragments = packageFragmentProvider.getPackageFragments(classId.packageFqName)
+        for (fragment in packageFragments) {
+            if (fragment !is DeserializedPackageFragment) continue
+
+            fragment.classDataFinder.findClassData(classId)?.let { return it }
+        }
+        return null
     }
 }

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/IncrementalJpsTestGenerated.java

@@ -467,6 +467,12 @@ public class IncrementalJpsTestGenerated extends AbstractIncrementalJpsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("functionReferencingClass")
+        public void testFunctionReferencingClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/");
+            doTest(fileName);
+        }
+
         @TestMetadata("independentClasses")
         public void testIndependentClasses() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/independentClasses/");

jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/A.kt

@@ -0,0 +1 @@
+class A(val x: Int)

jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/build.log

@@ -0,0 +1,11 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/UseAKt.class
+End of files
+Compiling files:
+  src/useA.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/pureKotlin/functionReferencingClass/useA.kt

@@ -0,0 +1 @@
+fun useA(a: A) { a.x }

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -3497,6 +3497,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("classReferencingClass.kt")
+        public void testClassReferencingClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/incremental/classReferencingClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("coroutines.kt")
         public void testCoroutines() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/incremental/coroutines.kt");
@@ -3515,6 +3521,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("functionReferencingClass.kt")
+        public void testFunctionReferencingClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/incremental/functionReferencingClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("inline.kt")
         public void testInline() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/incremental/inline.kt");

js/js.translator/testData/box/incremental/classReferencingClass.kt

@@ -0,0 +1,25 @@
+// EXPECTED_REACHABLE_NODES: 1002
+// FILE: A.kt
+
+open class A {
+    open fun f(): Int = 1
+}
+
+// FILE: B.kt
+// RECOMPILE
+
+class B : A() {
+    override fun f(): Int = super.f() + 2
+}
+
+// FILE: box.kt
+
+fun box(): String {
+    val af = A().f()
+    if (af != 1) return "fail: result of 'A().f()' is '$af', but '1' was expected"
+
+    val bf = B().f()
+    if (bf != 3) return "fail: result of 'B().f()' is '$bf', but '3' was expected"
+
+    return "OK"
+}

js/js.translator/testData/box/incremental/functionReferencingClass.kt

@@ -0,0 +1,21 @@
+// EXPECTED_REACHABLE_NODES: 995
+// FILE: A.kt
+
+open class A {
+    open fun f(): Int = 1
+}
+
+// FILE: useA.kt
+// RECOMPILE
+
+fun useA(a: A): Int = a.f()
+fun useList(xs: List<Int>) {}
+
+// FILE: box.kt
+
+fun box(): String {
+    val result = useA(A())
+    if (result != 1) return "fail: result of 'useA(A())' is '$result', but '1' was expected"
+
+    return "OK"
+}