Error for naming an interface 'symbol'

src/compiler/checker.ts

@@ -8903,6 +8903,7 @@ module ts {
                 case "number":
                 case "boolean":
                 case "string":
+                case "symbol":
                 case "void":
                     error(name, message, (<Identifier>name).text);
             }

tests/baselines/reference/symbolType20.errors.txt

@@ -0,0 +1,7 @@
+tests/cases/conformance/es6/Symbols/symbolType20.ts(1,11): error TS2427: Interface name cannot be 'symbol'
+
+
+==== tests/cases/conformance/es6/Symbols/symbolType20.ts (1 errors) ====
+    interface symbol { }
+              ~~~~~~
+!!! error TS2427: Interface name cannot be 'symbol'

tests/baselines/reference/symbolType20.js

@@ -0,0 +1,4 @@
+//// [symbolType20.ts]
+interface symbol { }
+
+//// [symbolType20.js]

tests/cases/conformance/es6/Symbols/symbolType20.ts

@@ -0,0 +1,2 @@
+//@target: ES6
+interface symbol { }