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-rw-r--r--dhall/src/semantics/tck/typecheck.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/dhall/src/semantics/tck/typecheck.rs b/dhall/src/semantics/tck/typecheck.rs
index 5a44c9c..e14bcc6 100644
--- a/dhall/src/semantics/tck/typecheck.rs
+++ b/dhall/src/semantics/tck/typecheck.rs
@@ -184,6 +184,11 @@ pub fn type_with<'cx, 'hir>(
) -> Result<Tir<'cx, 'hir>, TypeError> {
let tir = match hir.kind() {
HirKind::Var(var) => Tir::from_hir(hir, env.lookup(*var)),
+ HirKind::MissingVar(var) => mkerr(
+ ErrorBuilder::new(format!("unbound variable `{}`", var))
+ .span_err(hir.span(), "not found in this scope")
+ .format(),
+ )?,
HirKind::Import(import) => {
let typed = env.cx()[import].unwrap_result();
Tir::from_hir(hir, typed.ty.clone())