1 files changed, 65 insertions, 0 deletions
diff --git a/tests/src/Loader/classloader/regressions/421439/Test.il b/tests/src/Loader/classloader/regressions/421439/Test.il
new file mode 100644
index 0000000000..93c0c6f379
--- /dev/null
+++ b/tests/src/Loader/classloader/regressions/421439/Test.il
@@ -0,0 +1,65 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+.assembly extern System.Console { }
+.assembly extern mscorlib {}
+.assembly extern RefX1 {}
+.assembly extern ValX1 {}
+
+.assembly Test {}
+
+.class public sequential ansi sealed beforefieldinit Gen<T>
+       extends [mscorlib]System.ValueType
+{
+  .field public !T Fld1
+  .method public hidebysig specialname rtspecialname 
+          instance void  .ctor(!T fld1) cil managed
+  {
+    .maxstack  8
+    nop
+    ldarg.0
+    ldarg.1
+    stfld      !0 valuetype Gen<!T>::Fld1
+    ret
+  } 
+}
+
+
+// the below lines cause an AV
+// new Gen<ValX1<string>[][][]>(new ValX1<string>[1][][]);
+// new Gen<RefX1<RefX1<RefX1<string>>>>(new RefX1<RefX1<RefX1<string>>>());
+
+.class public auto ansi beforefieldinit Test
+       extends [mscorlib]System.Object
+{
+  .method public hidebysig static int32 Main() cil managed
+  {
+    .entrypoint
+    .maxstack  8
+    nop
+    ldc.i4.1
+    newarr     valuetype [ValX1]ValX1<string>[][]
+    newobj     instance void valuetype Gen<valuetype [ValX1]ValX1<string>[][][]>::.ctor(!0)
+    pop
+    newobj     instance void class [RefX1]RefX1<class [RefX1]RefX1<class [RefX1]RefX1<string>>>::.ctor()
+    newobj     instance void valuetype Gen<class [RefX1]RefX1<class [RefX1]RefX1<class [RefX1]RefX1<string>>>>::.ctor(!0)
+    pop
+
+    ldstr      "PASS"
+    call       void [System.Console]System.Console::WriteLine(string)
+
+    ldc.i4 100
+    ret
+  } 
+
+  .method public hidebysig specialname rtspecialname 
+          instance void  .ctor() cil managed
+  {
+    .maxstack  8
+    ldarg.0
+    call       instance void [mscorlib]System.Object::.ctor()
+    ret
+  }
+
+}