Index: include/lldb/Expression/UserExpression.h
===================================================================
--- include/lldb/Expression/UserExpression.h
+++ include/lldb/Expression/UserExpression.h
@@ -288,10 +288,6 @@
            uint32_t line_offset = 0, std::string *fixed_expression = nullptr,
            lldb::ModuleSP *jit_module_sp_ptr = nullptr);
 
-  static const Status::ValueType kNoResult =
-      0x1001; ///< ValueObject::GetError() returns this if there is no result
-              /// from the expression.
-
   const char *GetFixedText() {
     if (m_fixed_text.empty())
       return nullptr;
Index: include/lldb/lldb-enumerations.h
===================================================================
--- include/lldb/lldb-enumerations.h
+++ include/lldb/lldb-enumerations.h
@@ -254,7 +254,8 @@
   eExpressionHitBreakpoint,
   eExpressionTimedOut,
   eExpressionResultUnavailable,
-  eExpressionStoppedForDebug
+  eExpressionStoppedForDebug,
+  eExpressionProducedNoResult
 };
 
 enum SearchDepth {
Index: packages/Python/lldbsuite/test/expression_command/no-result/Makefile
===================================================================
--- packages/Python/lldbsuite/test/expression_command/no-result/Makefile
+++ packages/Python/lldbsuite/test/expression_command/no-result/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../../make
+
+C_SOURCES := main.c
+CFLAGS_EXTRAS += -std=c99
+
+include $(LEVEL)/Makefile.rules
Index: packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py
===================================================================
--- packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py
+++ packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py
@@ -0,0 +1,45 @@
+"""
+Test that an expression that returns no result returns a sensible error.
+"""
+
+from __future__ import print_function
+
+
+import os
+import time
+import re
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+
+
+class TestExprNoResult(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    # If your test case doesn't stress debug info, the
+    # set this to true.  That way it won't be run once for
+    # each debug info format.
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def test_no_result(self):
+        """Run an expression that has no result, check the error."""
+        self.build()
+        self.main_source_file = lldb.SBFileSpec("main.c")
+        self.sample_test()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+
+    def sample_test(self):
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
+                                   "Set a breakpoint here", self.main_source_file)
+
+        frame = thread.GetFrameAtIndex(0)
+        result = frame.EvaluateExpression("int $x = 10")
+        # No result expressions are considered to fail:
+        self.assertTrue(result.GetError().Fail(), "An expression with no result is a failure.")
+        # But the reason should be eExpressionProducedNoResult
+        self.assertEqual(result.GetError().GetError(), lldb.eExpressionProducedNoResult, 
+                         "But the right kind of failure")
Index: packages/Python/lldbsuite/test/expression_command/no-result/main.c
===================================================================
--- packages/Python/lldbsuite/test/expression_command/no-result/main.c
+++ packages/Python/lldbsuite/test/expression_command/no-result/main.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int
+main()
+{
+  int test_var = 10;
+  printf ("Set a breakpoint here: %d.\n", test_var);
+  return 0;
+}
Index: source/Commands/CommandObjectExpression.cpp
===================================================================
--- source/Commands/CommandObjectExpression.cpp
+++ source/Commands/CommandObjectExpression.cpp
@@ -487,7 +487,7 @@
         }
       } else {
         if (result_valobj_sp->GetError().GetError() ==
-            UserExpression::kNoResult) {
+            lldb::eExpressionProducedNoResult) {
           if (format != eFormatVoid &&
               m_interpreter.GetDebugger().GetNotifyVoid()) {
             error_stream->PutCString("(void)\n");
Index: source/Expression/REPL.cpp
===================================================================
--- source/Expression/REPL.cpp
+++ source/Expression/REPL.cpp
@@ -325,7 +325,7 @@
           if (result_valobj_sp->GetError().Success()) {
             handled |= PrintOneVariable(debugger, output_sp, result_valobj_sp);
           } else if (result_valobj_sp->GetError().GetError() ==
-                     UserExpression::kNoResult) {
+                     lldb::eExpressionProducedNoResult) {
             if (format != lldb::eFormatVoid && debugger.GetNotifyVoid()) {
               error_sp->PutCString("(void)\n");
               handled = true;
Index: source/Expression/UserExpression.cpp
===================================================================
--- source/Expression/UserExpression.cpp
+++ source/Expression/UserExpression.cpp
@@ -151,6 +151,9 @@
                                       ? UserExpression::eResultTypeId
                                       : UserExpression::eResultTypeAny;
   lldb::ExpressionResults execution_results = lldb::eExpressionSetupError;
+  
+  static const char *no_result_error = "Expression completed successfully "
+                                       "but had no result";
 
   Target *target = exe_ctx.GetTargetPtr();
   if (!target) {
@@ -304,7 +307,8 @@
         error.SetExpressionError(lldb::eExpressionSetupError,
                                  "expression needed to run but couldn't");
     } else if (execution_policy == eExecutionPolicyTopLevel) {
-      error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric);
+      error.SetExpressionError(lldb::eExpressionProducedNoResult,
+                               no_result_error);
       return lldb::eExpressionCompleted;
     } else {
       if (options.InvokeCancelCallback(lldb::eExpressionEvaluationExecution)) {
@@ -349,7 +353,8 @@
             log->Printf("== [UserExpression::Evaluate] Execution completed "
                         "normally with no result ==");
 
-          error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric);
+          error.SetExpressionError(lldb::eExpressionProducedNoResult,
+                                   no_result_error);
         }
       }
     }
Index: source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
===================================================================
--- source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
+++ source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
@@ -1758,7 +1758,7 @@
   if (!expr_result->GetError().Success()) {
     Status err = expr_result->GetError();
     // Expression returned is void, so this is actually a success
-    if (err.GetError() == UserExpression::kNoResult) {
+    if (err.GetError() == lldb::eExpressionProducedNoResult) {
       if (log)
         log->Printf("%s - expression returned void.", __FUNCTION__);