fix(tvix/eval): thunk lambda expressions r/6217

As cl/8658 and b/274 reveal, lambda expressions are also wrapped in
thunks.

Resolves b/274.

Change-Id: I02fe5c8730ac76748d940e4f4427116587875275
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8662
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

1 files changed, 3 insertions, 5 deletions

diff --git a/tvix/eval/src/compiler/mod.rs b/tvix/eval/src/compiler/mod.rs
index 773fc0f053ab..478d132758e8 100644
--- a/tvix/eval/src/compiler/mod.rs
+++ b/tvix/eval/src/compiler/mod.rs
@@ -284,11 +284,9 @@ impl Compiler<'_> {
 
             ast::Expr::Ident(ident) => self.compile_ident(slot, ident),
             ast::Expr::With(with) => self.thunk(slot, with, |c, s| c.compile_with(s, with)),
-            ast::Expr::Lambda(lambda) => {
-                self.compile_lambda_or_thunk(false, slot, lambda, |c, s| {
-                    c.compile_lambda(s, lambda)
-                })
-            }
+            ast::Expr::Lambda(lambda) => self.thunk(slot, lambda, move |c, s| {
+                c.compile_lambda_or_thunk(false, s, lambda, |c, s| c.compile_lambda(s, lambda))
+            }),
             ast::Expr::Apply(apply) => {
                 self.thunk(slot, apply, move |c, s| c.compile_apply(s, apply))
             }