eval: introduce a top-level defer context for top-level statements

sbinet · sbinet · commit d472ff93d872 · 2018-03-09T14:09:42.000+01:00
Fixes neugram#210.
diff --git a/eval/eval.go b/eval/eval.go
@@ -123,8 +123,7 @@ func New(path string, shellState *shell.State) *Program {
 		Path:     path,
 		Cur: &Scope{
 			Parent: universe,
-			// FIXME(sbinet): what should this be?
-			// fct: "ng-main",
+			fct:    "۰ng-main",
 		},
 		ShellState:  shellState,
 		reflector:   newReflector(),
diff --git a/eval/testdata/defer8.ng b/eval/testdata/defer8.ng
@@ -0,0 +1,3 @@
+defer func() {} ()
+
+print("OK")
