diff --git a/lldb/include/lldb/Core/EmulateInstruction.h b/lldb/include/lldb/Core/EmulateInstruction.h
--- a/lldb/include/lldb/Core/EmulateInstruction.h
+++ b/lldb/include/lldb/Core/EmulateInstruction.h
@@ -189,7 +189,7 @@
 
   public:
     enum InfoType GetInfoType() const { return info_type; }
-    union {
+    union ContextInfo {
       struct RegisterPlusOffset {
         RegisterInfo reg;      // base register
         int64_t signed_offset; // signed offset added to base register
@@ -241,6 +241,8 @@
 
       uint32_t isa;
     } info;
+    static_assert(std::is_trivial<ContextInfo>::value,
+                  "ContextInfo must be trivial.");
 
     Context() = default;
 
diff --git a/lldb/include/lldb/lldb-private-types.h b/lldb/include/lldb/lldb-private-types.h
--- a/lldb/include/lldb/lldb-private-types.h
+++ b/lldb/include/lldb/lldb-private-types.h
@@ -15,6 +15,8 @@
 
 #include "llvm/ADT/ArrayRef.h"
 
+#include <type_traits>
+
 namespace llvm {
 namespace sys {
 class DynamicLibrary;
@@ -70,6 +72,8 @@
                                           byte_size);
   }
 };
+static_assert(std::is_trivial<RegisterInfo>::value,
+              "RegisterInfo must be trivial.");
 
 /// Registers are grouped into register sets
 struct RegisterSet {