Minor fix to match C implementation semantics

Author: ned14

Readme.md

@@ -25,6 +25,11 @@ You can find an example of use
 Experimental.Outcome works great with C++ exceptions globally disabled, and includes
 only a very minimal set of C++ headers.
 
+If you want a 100% pure C edition with multiple language bindings, the reference
+implementation for WG14 the C programming language is available at https://github.com/ned14/wg14_result.
+This C++ implementation is 100% ABI compatible with the pure C edition and objects
+can be freely reinterpet casted between both implementations.
+
 ## Features:
 
 - Portable to any C++ 11 compiler. These are known to work:

include/status-code/status_code_domain.hpp

@@ -261,6 +261,10 @@ class status_code_domain
           SYSTEM_ERROR2_FATAL(buffer);
         }
       }
+      o._begin = nullptr;
+      o._end = nullptr;
+      o._state[0] = o._state[1] = o._state[2] = nullptr;
+      *(_thunk_spec *) (&o._thunk) = nullptr;
     }
     //! Copy assignment
     SYSTEM_ERROR2_CONSTEXPR20 string_ref &operator=(const string_ref &o)