diff --git a/llvm/lib/Demangle/RustDemangle.cpp b/llvm/lib/Demangle/RustDemangle.cpp
--- a/llvm/lib/Demangle/RustDemangle.cpp
+++ b/llvm/lib/Demangle/RustDemangle.cpp
@@ -427,6 +427,13 @@
     return printBasicType(Type);
 
   switch (C) {
+  case 'A':
+    print("[");
+    demangleType();
+    print("; ");
+    demangleConst();
+    print("]");
+    break;
   case 'C':
   case 'M':
   case 'X':
diff --git a/llvm/test/Demangle/rust.test b/llvm/test/Demangle/rust.test
--- a/llvm/test/Demangle/rust.test
+++ b/llvm/test/Demangle/rust.test
@@ -155,6 +155,14 @@
 CHECK: <Name<>>
        _RMC5crateIC4NameE
 
+; Types
+
+CHECK: types::<[_; _]>
+       _RIC5typesAppE
+
+CHECK: types::<[u8; 0]>
+       _RIC5typesAhj0_E
+
 ; Integer constants. Test value demangling.
 
 CHECK: integer::<0>