feat(check): Avoid propagating errors on lift_io! misuse

Marwes · Nov 8, 2019 · 3dbabe5 · 3dbabe5
1 parent 752e2bc
commit 3dbabe5
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/src/lift_io.rs b/src/lift_io.rs
@@ -35,6 +35,16 @@ impl Macro for LiftIo {
         env.run(&mut symbols, &mut module);
         let typ = module.env_type_of(&EmptyEnv::default());
 
+        match *typ {
+            Type::Record(_) => (),
+            _ => {
+                return Box::new(future::err(macros::Error::message(format!(
+                    "The second argument to `lift_io!` must be a record. Found: `{}`",
+                    typ
+                ))))
+            }
+        }
+
         let span = module.span;
 
         let vm = env.vm;