diff --git a/compiler/testData/codegen/box/coroutines/kt31784.kt b/compiler/testData/codegen/box/coroutines/kt31784.kt
new file mode 100644
index 00000000000..670609da260
--- /dev/null
+++ b/compiler/testData/codegen/box/coroutines/kt31784.kt
@@ -0,0 +1,34 @@
+// !LANGUAGE: +NewInference
+// WITH_RUNTIME
+
+@file:UseExperimental(ExperimentalTypeInference::class)
+
+package test
+
+import kotlin.experimental.ExperimentalTypeInference
+
+interface Builder<T : Any> {
+    fun filter(filter: (T) -> Boolean)
+}
+
+fun <T : Any> build(@BuilderInference block: Builder<T>.() -> Unit): T {
+    val o = object : Builder<T> {
+        override fun filter(filter: (T) -> Boolean) {
+
+        }
+    }
+
+    o.block()
+
+    return 42 as T
+}
+
+fun box(): String {
+    val r = build<Int> {
+        filter {
+            it > 10
+        }
+    }
+
+    return if (r == 42) "OK" else "Fail: $r"
+}
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fullJdk/kt31757.kt b/compiler/testData/codegen/box/fullJdk/kt31757.kt
new file mode 100644
index 00000000000..d25e8cade55
--- /dev/null
+++ b/compiler/testData/codegen/box/fullJdk/kt31757.kt
@@ -0,0 +1,19 @@
+// !LANGUAGE: +NewInference
+// TARGET_BACKEND: JVM
+// FULL_JDK
+
+package test
+
+import java.util.function.*
+
+interface Interface1<T> : () -> T, Supplier<T> {
+    override fun invoke() = get()
+}
+
+class Impl : Interface1<String> {
+    override fun get(): String = "OK"
+}
+
+fun box(): String {
+    return Impl()()
+}
\ No newline at end of file
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index 7d5fdf4d66d..cf5791bc8b8 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -6054,6 +6054,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/coroutines/kt30858.kt");
         }
 
+        @TestMetadata("kt31784.kt")
+        public void testKt31784() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt31784.kt");
+        }
+
         @TestMetadata("lastExpressionIsLoop.kt")
         public void testLastExpressionIsLoop_1_2() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/lastExpressionIsLoop.kt", "kotlin.coroutines.experimental");
@@ -10944,6 +10949,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/fullJdk/intCountDownLatchExtension.kt");
         }
 
+        @TestMetadata("kt31757.kt")
+        public void testKt31757() throws Exception {
+            runTest("compiler/testData/codegen/box/fullJdk/kt31757.kt");
+        }
+
         @TestMetadata("kt434.kt")
         public void testKt434() throws Exception {
             runTest("compiler/testData/codegen/box/fullJdk/kt434.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 90beaf151fd..91934f15490 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -6054,6 +6054,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/coroutines/kt30858.kt");
         }
 
+        @TestMetadata("kt31784.kt")
+        public void testKt31784() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt31784.kt");
+        }
+
         @TestMetadata("lastExpressionIsLoop.kt")
         public void testLastExpressionIsLoop_1_2() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/lastExpressionIsLoop.kt", "kotlin.coroutines.experimental");
@@ -10944,6 +10949,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/fullJdk/intCountDownLatchExtension.kt");
         }
 
+        @TestMetadata("kt31757.kt")
+        public void testKt31757() throws Exception {
+            runTest("compiler/testData/codegen/box/fullJdk/kt31757.kt");
+        }
+
         @TestMetadata("kt434.kt")
         public void testKt434() throws Exception {
             runTest("compiler/testData/codegen/box/fullJdk/kt434.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index d12a76351ef..0a21ae7e092 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -6054,6 +6054,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/coroutines/kt30858.kt");
         }
 
+        @TestMetadata("kt31784.kt")
+        public void testKt31784() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt31784.kt");
+        }
+
         @TestMetadata("lastExpressionIsLoop.kt")
         public void testLastExpressionIsLoop_1_2() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/lastExpressionIsLoop.kt", "kotlin.coroutines.experimental");
@@ -10944,6 +10949,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/fullJdk/intCountDownLatchExtension.kt");
         }
 
+        @TestMetadata("kt31757.kt")
+        public void testKt31757() throws Exception {
+            runTest("compiler/testData/codegen/box/fullJdk/kt31757.kt");
+        }
+
         @TestMetadata("kt434.kt")
         public void testKt434() throws Exception {
             runTest("compiler/testData/codegen/box/fullJdk/kt434.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
index 421a51b52d5..97ead3141bc 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
@@ -4949,6 +4949,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/coroutines/kt30858.kt");
         }
 
+        @TestMetadata("kt31784.kt")
+        public void testKt31784() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt31784.kt");
+        }
+
         @TestMetadata("lastExpressionIsLoop.kt")
         public void testLastExpressionIsLoop_1_3() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/lastExpressionIsLoop.kt", "kotlin.coroutines");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
index 20a298d42e5..340411a9486 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
@@ -5174,6 +5174,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/coroutines/kt30858.kt");
         }
 
+        @TestMetadata("kt31784.kt")
+        public void testKt31784() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt31784.kt");
+        }
+
         @TestMetadata("lastExpressionIsLoop.kt")
         public void testLastExpressionIsLoop_1_2() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/lastExpressionIsLoop.kt", "kotlin.coroutines.experimental");