Fix for KT-6863: Internal compiler error folding functions

#KT-6863 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/InlineCodegen.java

@@ -24,6 +24,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.backend.common.CodegenUtil;
 import org.jetbrains.kotlin.builtins.InlineStrategy;
 import org.jetbrains.kotlin.builtins.InlineUtil;
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
 import org.jetbrains.kotlin.codegen.*;
 import org.jetbrains.kotlin.codegen.context.CodegenContext;
 import org.jetbrains.kotlin.codegen.context.FieldOwnerContext;
@@ -508,11 +509,11 @@ public class InlineCodegen extends CallGenerator {
         }
     }
 
-    public static boolean isInliningClosure(JetExpression expression, ValueParameterDescriptor valueParameterDescriptora) {
+    public static boolean isInliningClosure(JetExpression expression, ValueParameterDescriptor valueParameterDescriptor) {
         //TODO deparenthisise typed
-        JetExpression deparenthesize = JetPsiUtil.deparenthesize(expression);
-        return deparenthesize instanceof JetFunctionLiteralExpression &&
-               !InlineUtil.hasNoinlineAnnotation(valueParameterDescriptora);
+        JetExpression deparenthesized = JetPsiUtil.deparenthesize(expression);
+        return deparenthesized instanceof JetFunctionLiteralExpression &&
+               InlineUtil.isInlineLambdaParameter(valueParameterDescriptor);
     }
 
     public void rememberClosure(JetExpression expression, Type type) {

compiler/frontend/src/org/jetbrains/kotlin/resolve/InlineDescriptorUtils.java

@@ -76,7 +76,7 @@ public class InlineDescriptorUtils {
                     ArgumentMapping mapping = resolvedCall.getArgumentMapping(argument);
                     if (mapping instanceof ArgumentMatch) {
                         ValueParameterDescriptor parameter = ((ArgumentMatch) mapping).getValueParameter();
-                        if (!InlineUtil.hasNoinlineAnnotation(parameter)) {
+                        if (InlineUtil.isInlineLambdaParameter(parameter)) {
                             return !checkNonLocalReturn || allowsNonLocalReturns(parameter);
                         }
                     }

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/checkers/InlineChecker.java

@@ -222,9 +222,8 @@ class InlineChecker implements CallChecker {
     private static boolean isInlinableParameter(@NotNull CallableDescriptor descriptor) {
         JetType type = descriptor.getReturnType();
         return type != null &&
-               KotlinBuiltIns.isExactFunctionOrExtensionFunctionType(type) &&
-               !type.isMarkedNullable() &&
-               !InlineUtil.hasNoinlineAnnotation(descriptor);
+               InlineUtil.isInlineLambdaParameter(descriptor) &&
+               !type.isMarkedNullable();
     }
 
     private static boolean isInvokeOrInlineExtension(@NotNull CallableDescriptor descriptor) {
@@ -272,13 +271,4 @@ class InlineChecker implements CallChecker {
             context.trace.report(Errors.NON_LOCAL_RETURN_NOT_ALLOWED.on(parameterUsage, parameterUsage, inlinableParameterDescriptor, descriptor));
         }
     }
-
-    @Nullable
-    public static PsiElement getDeclaration(JetExpression expression) {
-        do {
-            expression = PsiTreeUtil.getParentOfType(expression, JetDeclaration.class);
-        } while (expression instanceof JetMultiDeclaration || expression instanceof JetProperty);
-        return expression;
-    }
-
 }

compiler/frontend/src/org/jetbrains/kotlin/resolve/extension/InlineAnalyzerExtension.java

@@ -143,17 +143,15 @@ public class InlineAnalyzerExtension implements FunctionAnalyzerExtension.Analyz
             @Nullable BindingTrace trace
     ) {
         JetType type = parameter.getReturnType();
-        if (type != null && KotlinBuiltIns.isExactFunctionOrExtensionFunctionType(type)) {
-            if (!InlineUtil.hasNoinlineAnnotation(parameter)) {
-                if (type.isMarkedNullable()) {
-                    if (trace != null) {
-                        trace.report(Errors.NULLABLE_INLINE_PARAMETER.on(expression, expression, functionDescriptor));
-                    }
-                }
-                else {
-                    return true;
+        if (type != null && InlineUtil.isInlineLambdaParameter(parameter)) {
+            if (type.isMarkedNullable()) {
+                if (trace != null) {
+                    trace.report(Errors.NULLABLE_INLINE_PARAMETER.on(expression, expression, functionDescriptor));
                 }
             }
+            else {
+                return true;
+            }
         }
         return false;
     }

compiler/testData/codegen/boxInline/noInline/lambdaAsGeneric.1.kt

@@ -0,0 +1,5 @@
+fun box() : String {
+    test {"123"}
+
+    return "OK"
+}

compiler/testData/codegen/boxInline/noInline/lambdaAsGeneric.2.kt

@@ -0,0 +1,3 @@
+inline fun <T> test(p: T) {
+    p.toString()
+}

compiler/testData/codegen/boxInline/noInline/lambdaAsNonFunction.1.kt

@@ -0,0 +1,5 @@
+fun box() : String {
+    test {"123"}
+
+    return "OK"
+}

compiler/testData/codegen/boxInline/noInline/lambdaAsNonFunction.2.kt

@@ -0,0 +1,3 @@
+inline fun test(p: Any) {
+    p.toString()
+}

compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsGeneric.kt

@@ -0,0 +1,11 @@
+fun box() : String {
+    test {
+        <!RETURN_NOT_ALLOWED!>return@box "123"<!>
+    }
+
+    return "OK"
+}
+
+<!NOTHING_TO_INLINE!>inline fun <T> test(p: T)<!> {
+    p.toString()
+}

compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsGeneric.txt

@@ -0,0 +1,4 @@
+package
+
+internal fun box(): kotlin.String
+kotlin.inline() internal fun </*0*/ T> test(/*0*/ p: T): kotlin.Unit

compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsNonFunction.kt

@@ -0,0 +1,11 @@
+fun box() : String {
+    test {
+        <!RETURN_NOT_ALLOWED!>return@box "123"<!>
+    }
+
+    return "OK"
+}
+
+<!NOTHING_TO_INLINE!>inline fun test(p: Any)<!> {
+    p.toString()
+}

compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsNonFunction.txt

@@ -0,0 +1,4 @@
+package
+
+internal fun box(): kotlin.String
+kotlin.inline() internal fun test(/*0*/ p: kotlin.Any): kotlin.Unit

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -6739,6 +6739,18 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("lambdaAsGeneric.kt")
+                public void testLambdaAsGeneric() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsGeneric.kt");
+                    doTest(fileName);
+                }
+
+                @TestMetadata("lambdaAsNonFunction.kt")
+                public void testLambdaAsNonFunction() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaAsNonFunction.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("lambdaWithGlobalReturnsInsideOnlyLocalOne.kt")
                 public void testLambdaWithGlobalReturnsInsideOnlyLocalOne() throws Exception {
                     String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/inline/nonLocalReturns/lambdaWithGlobalReturnsInsideOnlyLocalOne.kt");

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxInlineCodegenTestGenerated.java

@@ -320,6 +320,18 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/noInline"), Pattern.compile("^(.+)\\.1.kt$"), true);
         }
 
+        @TestMetadata("lambdaAsGeneric.1.kt")
+        public void testLambdaAsGeneric() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/lambdaAsGeneric.1.kt");
+            doTestMultiFileWithInlineCheck(fileName);
+        }
+
+        @TestMetadata("lambdaAsNonFunction.1.kt")
+        public void testLambdaAsNonFunction() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/lambdaAsNonFunction.1.kt");
+            doTestMultiFileWithInlineCheck(fileName);
+        }
+
         @TestMetadata("noInline.1.kt")
         public void testNoInline() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/noInline.1.kt");

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstInlineKotlinTestGenerated.java

@@ -320,6 +320,18 @@ public class CompileKotlinAgainstInlineKotlinTestGenerated extends AbstractCompi
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/noInline"), Pattern.compile("^(.+)\\.1.kt$"), true);
         }
 
+        @TestMetadata("lambdaAsGeneric.1.kt")
+        public void testLambdaAsGeneric() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/lambdaAsGeneric.1.kt");
+            doBoxTestWithInlineCheck(fileName);
+        }
+
+        @TestMetadata("lambdaAsNonFunction.1.kt")
+        public void testLambdaAsNonFunction() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/lambdaAsNonFunction.1.kt");
+            doBoxTestWithInlineCheck(fileName);
+        }
+
         @TestMetadata("noInline.1.kt")
         public void testNoInline() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxInline/noInline/noInline.1.kt");

core/descriptors/src/org/jetbrains/kotlin/builtins/InlineUtil.java

@@ -29,13 +29,21 @@ import org.jetbrains.kotlin.resolve.DescriptorUtils;
 import org.jetbrains.kotlin.resolve.constants.ArrayValue;
 import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant;
 import org.jetbrains.kotlin.resolve.constants.EnumValue;
+import org.jetbrains.kotlin.types.JetType;
 
 import java.util.List;
 
 public class InlineUtil {
 
-    public static boolean hasNoinlineAnnotation(@NotNull CallableDescriptor valueParameterDescriptor) {
-        return KotlinBuiltIns.containsAnnotation(valueParameterDescriptor, KotlinBuiltIns.getNoinlineClassAnnotationFqName());
+    public static boolean hasNoinlineAnnotation(@NotNull CallableDescriptor valueParameterOrReceiver) {
+        return KotlinBuiltIns.containsAnnotation(valueParameterOrReceiver, KotlinBuiltIns.getNoinlineClassAnnotationFqName());
+    }
+
+    public static boolean isInlineLambdaParameter(@NotNull CallableDescriptor valueParameterOrReceiver) {
+        JetType type = valueParameterOrReceiver.getOriginal().getReturnType();
+        return !hasNoinlineAnnotation(valueParameterOrReceiver) &&
+               type != null &&
+               KotlinBuiltIns.isExactFunctionOrExtensionFunctionType(type);
     }
 
     @NotNull

js/js.translator/src/org/jetbrains/kotlin/js/translate/reference/CallExpressionTranslator.java

@@ -84,7 +84,7 @@ public final class CallExpressionTranslator extends AbstractCallExpressionTransl
         if (descriptor instanceof ValueParameterDescriptor) {
             DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
             return InlineUtil.getInlineType(containingDescriptor).isInline()
-                   && !InlineUtil.hasNoinlineAnnotation(descriptor);
+                   && InlineUtil.isInlineLambdaParameter(descriptor);
         }
 
         return false;