DataflowError shouldn't provide stack by default

Author: JaroslavTulach

engine/runtime-integration-tests/src/test/scala/org/enso/interpreter/test/instrument/RuntimeErrorsTest.scala

@@ -1060,7 +1060,7 @@ class RuntimeErrorsTest
             "div"
           )
         ),
-        Api.ExpressionUpdate.Payload.DataflowError(Seq(xId))
+        Api.ExpressionUpdate.Payload.DataflowError(Seq())
       ),
       TestMessages.error(
         contextId,
@@ -1072,7 +1072,7 @@ class RuntimeErrorsTest
             "-"
           )
         ),
-        Api.ExpressionUpdate.Payload.DataflowError(Seq(xId))
+        Api.ExpressionUpdate.Payload.DataflowError(Seq())
       ),
       context.executionComplete(contextId)
     )
@@ -1305,6 +1305,8 @@ class RuntimeErrorsTest
     val contents = metadata.appendToCode(code)
     val mainFile = context.writeMain(contents)
 
+    metadata.assertInCode(fooThrowId, code, "Error.throw MyError1")
+
     // create context
     context.send(Api.Request(requestId, Api.CreateContextRequest(contextId)))
     context.receive shouldEqual Some(