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-rw-r--r--dhall/src/semantics/phase/typecheck.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/dhall/src/semantics/phase/typecheck.rs b/dhall/src/semantics/phase/typecheck.rs
index 926598d..7e408eb 100644
--- a/dhall/src/semantics/phase/typecheck.rs
+++ b/dhall/src/semantics/phase/typecheck.rs
@@ -494,10 +494,11 @@ fn type_last_layer(
ValueKind::UnionType(kts) => match kts.get(&x) {
// Constructor has type T -> < x: T, ... >
Some(Some(t)) => {
+ let x = ctx.new_binder(x);
RetTypeOnly(
tck_pi_type(
ctx,
- ctx.new_binder(x),
+ x.clone(),
t.clone(),
r.under_binder(x),
)?