diff --git a/compiler/testData/codegen/box/regressions/kt3107.kt b/compiler/testData/codegen/box/regressions/kt3107.kt
new file mode 100644
index 00000000000..851d6931058
--- /dev/null
+++ b/compiler/testData/codegen/box/regressions/kt3107.kt
@@ -0,0 +1,17 @@
+fun foo(): String {
+    val s = try {
+        "OK"
+    } catch (e: Exception) {
+        try {
+            ""
+        } catch (ee: Exception) {
+            ""
+        }
+    }
+
+    return s
+}
+
+fun box(): String {
+    return foo()
+}
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/regressions/kt3421.kt b/compiler/testData/codegen/box/regressions/kt3421.kt
new file mode 100644
index 00000000000..05529fbcfa9
--- /dev/null
+++ b/compiler/testData/codegen/box/regressions/kt3421.kt
@@ -0,0 +1,9 @@
+public object Globals{
+    public fun get(key: String, remove: Boolean = true): String {
+        return "OK"
+    }
+}
+
+fun box(): String {
+    return Globals["test"]
+}
diff --git a/compiler/testData/codegen/box/regressions/kt3903.kt b/compiler/testData/codegen/box/regressions/kt3903.kt
new file mode 100644
index 00000000000..ddb4e3e6766
--- /dev/null
+++ b/compiler/testData/codegen/box/regressions/kt3903.kt
@@ -0,0 +1,11 @@
+class Foo {
+    fun bar(): String {
+        fun foo<T>(t:() -> T) : T = t()
+        foo { }
+        return "OK"
+    }
+}
+
+fun box(): String {
+    return Foo().bar()
+}
diff --git a/compiler/testData/codegen/box/regressions/kt4281.kt b/compiler/testData/codegen/box/regressions/kt4281.kt
new file mode 100644
index 00000000000..ff5af0bfef5
--- /dev/null
+++ b/compiler/testData/codegen/box/regressions/kt4281.kt
@@ -0,0 +1,15 @@
+abstract class C {
+    fun test(x: Int) {
+        if (x == 0) return
+        if (this is D) {
+            (this: D).test(x - 1)
+        }
+    }
+}
+
+class D: C()
+
+fun box(): String {
+    D().test(10)
+    return "OK"
+}
diff --git a/compiler/testData/codegen/boxWithStdlib/regressions/kt3442.kt b/compiler/testData/codegen/boxWithStdlib/regressions/kt3442.kt
new file mode 100644
index 00000000000..55f3226b19f
--- /dev/null
+++ b/compiler/testData/codegen/boxWithStdlib/regressions/kt3442.kt
@@ -0,0 +1,6 @@
+fun box(): String {
+    val m = hashMapOf<String, String?>()
+    m.put("b", null)
+    val oldValue = m.getOrPut("b", { "Foo" })
+    return if (oldValue == null) "OK" else "fail: $oldValue"
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java
index cc289c28823..0b613033293 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java
@@ -6037,24 +6037,48 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("kt3107.kt")
+        public void testKt3107() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3107.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt3173.kt")
         public void testKt3173() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3173.kt");
             doTest(fileName);
         }
 
+        @TestMetadata("kt3421.kt")
+        public void testKt3421() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3421.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3587.kt");
             doTest(fileName);
         }
 
+        @TestMetadata("kt3903.kt")
+        public void testKt3903() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3903.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt3999.kt")
         public void testKt3999() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt3999.kt");
             doTest(fileName);
         }
 
+        @TestMetadata("kt4281.kt")
+        public void testKt4281() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt4281.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt4682.kt")
         public void testKt4682() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/regressions/kt4682.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java
index 0a234871a95..5d95f8c08c5 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java
@@ -2892,6 +2892,12 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             doTestWithStdlib(fileName);
         }
 
+        @TestMetadata("kt3442.kt")
+        public void testKt3442() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/regressions/kt3442.kt");
+            doTestWithStdlib(fileName);
+        }
+
         @TestMetadata("kt4262.kt")
         public void testKt4262() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/regressions/kt4262.kt");