diff --git a/compiler/frontend/src/org/jetbrains/kotlin/types/TypeIntersector.java b/compiler/frontend/src/org/jetbrains/kotlin/types/TypeIntersector.java
index b6923d19654..106df7dcf9d 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/types/TypeIntersector.java
+++ b/compiler/frontend/src/org/jetbrains/kotlin/types/TypeIntersector.java
@@ -117,6 +117,11 @@ public class TypeIntersector {
             // TODO: maybe return the most specific among the types that are subtypes to all others in the `nullabilityStripped`?
             // TODO: e.g. among {Int, Int?, Int!}, return `Int` (now it returns `Int!`).
             KotlinType bestRepresentative = FlexibleTypesKt.singleBestRepresentative(nullabilityStripped);
+
+            if (bestRepresentative == null) {
+                bestRepresentative = UtilsKt.hackForTypeIntersector(nullabilityStripped);
+            }
+
             if (bestRepresentative == null) {
                 throw new AssertionError("Empty intersection for types " + types);
             }
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/types/Utils.kt b/compiler/frontend/src/org/jetbrains/kotlin/types/Utils.kt
new file mode 100644
index 00000000000..e3fe5723ed9
--- /dev/null
+++ b/compiler/frontend/src/org/jetbrains/kotlin/types/Utils.kt
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.types
+
+import org.jetbrains.kotlin.types.checker.KotlinTypeChecker
+
+/**
+ * This is temporary hack for type intersector.
+ *
+ * It is almost save, because:
+ *  - it running only if general algorithm is failed
+ *  - returned type is subtype of all [types].
+ *
+ * But it is hack, because it can give unstable result, but it better than exception.
+ * See KT-11266.
+ */
+internal fun hackForTypeIntersector(types: Collection<KotlinType>): KotlinType? {
+    if (types.size < 2) return types.firstOrNull()
+
+    return types.firstOrNull { candidate ->
+        types.all {
+            KotlinTypeChecker.ERROR_TYPES_ARE_EQUAL_TO_ANYTHING.isSubtypeOf(candidate, it)
+        }
+    }
+}
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.kt
new file mode 100644
index 00000000000..c4cb696f7d6
--- /dev/null
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.kt
@@ -0,0 +1,2 @@
+
+fun foo(first: Array<Any?>, second: Array<Any?>) = Pair(first.toCollection(<!NO_VALUE_FOR_PARAMETER!>)<!>, second.toCollection(<!NO_VALUE_FOR_PARAMETER!>)<!>)
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.txt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.txt
new file mode 100644
index 00000000000..440cae3e1b7
--- /dev/null
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.txt
@@ -0,0 +1,3 @@
+package
+
+public fun foo(/*0*/ first: kotlin.Array<kotlin.Any?>, /*1*/ second: kotlin.Array<kotlin.Any?>): kotlin.Pair<kotlin.collections.MutableCollection<kotlin.Any?>, kotlin.collections.MutableCollection<kotlin.Any?>>
diff --git a/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java b/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java
index 40ceef41d4d..7ccd4a02a00 100644
--- a/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java
@@ -784,6 +784,12 @@ public class DiagnosticsTestWithStdLibGenerated extends AbstractDiagnosticsTestW
             doTest(fileName);
         }
 
+        @TestMetadata("kt11266.kt")
+        public void testKt11266() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/inference/kt11266.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt1558.kt")
         public void testKt1558() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/inference/kt1558.kt");