Merge pull request #1679 from herwinw/raise_backtrace

Support backtrace argument in Kernel.raise

spec/shared/kernel/raise.rb

@@ -142,10 +142,8 @@ def initialize
   end
 
   it "allows Exception, message, and backtrace parameters" do
-    NATFIXME 'backtrace parameter', exception: SpecFailedException do
-      -> do
-        @object.raise(ArgumentError, "message", caller)
-      end.should raise_error(ArgumentError, "message")
-    end
+    -> do
+      @object.raise(ArgumentError, "message", caller)
+    end.should raise_error(ArgumentError, "message")
   end
 end

src/exception_object.cpp

@@ -15,9 +15,6 @@ ExceptionObject *ExceptionObject::create_for_raise(Env *env, Args args, Exceptio
     else
         env->ensure_no_extra_keywords(kwargs);
 
-    if (backtrace)
-        env->raise("StandardError", "NATFIXME: Unsupported backtrace argument to exception");
-
     if (!klass && !message && cause)
         env->raise("ArgumentError", "only cause is given with no arguments");
 
@@ -60,6 +57,9 @@ ExceptionObject *ExceptionObject::create_for_raise(Env *env, Args args, Exceptio
         exception->set_cause(cause->as_exception());
     }
 
+    if (backtrace)
+        exception->set_backtrace(env, backtrace);
+
     return exception;
 }