Fix misleading error message: Clean stack rule

sanket1729 · sanket1729 · commit af5776618201 · 2020-09-24T12:36:16.000-05:00
Error messages in cleanstack is misleading as
it lets the user believe that there are extra
elements on stack which is incorrect if the
stack is empty.
diff --git a/src/script/script_error.cpp b/src/script/script_error.cpp
@@ -76,7 +76,7 @@ std::string ScriptErrorString(const ScriptError serror)
         case SCRIPT_ERR_PUBKEYTYPE:
             return "Public key is neither compressed or uncompressed";
         case SCRIPT_ERR_CLEANSTACK:
-            return "Extra items left on stack after execution";
+            return "Stack size must be exactly one after execution";
         case SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH:
             return "Witness program has incorrect length";
         case SCRIPT_ERR_WITNESS_PROGRAM_WITNESS_EMPTY:
