Ensure compile errors are wrapped

lib/execjs/external_runtime.rb

@@ -9,6 +9,9 @@ module ExecJS
 
         @runtime = runtime
         @source  = source
+
+        # Test compile context source
+        exec("")
       end
 
       def eval(source, options = {})

lib/execjs/ruby_racer_runtime.rb

@@ -8,7 +8,16 @@ module ExecJS
 
         lock do
           @v8_context = ::V8::Context.new
-          @v8_context.eval(source)
+
+          begin
+            @v8_context.eval(source)
+          rescue ::V8::JSError => e
+            if e.value["name"] == "SyntaxError"
+              raise RuntimeError, e.value.to_s
+            else
+              raise ProgramError, e.value.to_s
+            end
+          end
         end
       end
 

test/test_execjs.rb

@@ -206,7 +206,25 @@ class TestExecJS < Test
     end
   end
 
-  def test_thrown_exception
+  def test_compile_syntax_error
+    assert_raises ExecJS::RuntimeError do
+      ExecJS.compile(")")
+    end
+  end
+
+  def test_exec_thrown_exception
+    assert_raises ExecJS::ProgramError do
+      ExecJS.exec("throw 'hello'")
+    end
+  end
+
+  def test_eval_thrown_exception
+    assert_raises ExecJS::ProgramError do
+      ExecJS.exec("throw 'hello'")
+    end
+  end
+
+  def test_compile_thrown_exception
     assert_raises ExecJS::ProgramError do
       ExecJS.exec("throw 'hello'")
     end