feat(tvix/eval): thunk function applications r/4766

Change-Id: I18065ed234ec104ac74d0e1c2d0937c2d78ca7db
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6433
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

1 files changed, 4 insertions, 1 deletions

diff --git a/tvix/eval/src/compiler/mod.rs b/tvix/eval/src/compiler/mod.rs
index f40d3855f7fb..aacb7143d3b6 100644
--- a/tvix/eval/src/compiler/mod.rs
+++ b/tvix/eval/src/compiler/mod.rs
@@ -172,7 +172,9 @@ impl Compiler<'_> {
             ast::Expr::Ident(ident) => self.compile_ident(slot, ident),
             ast::Expr::With(with) => self.compile_with(slot, with),
             ast::Expr::Lambda(lambda) => self.compile_lambda(slot, lambda),
-            ast::Expr::Apply(apply) => self.compile_apply(slot, apply),
+            ast::Expr::Apply(apply) => {
+                self.thunk(slot, &apply, move |c, a, s| c.compile_apply(s, a.clone()))
+            }
 
             // Parenthesized expressions are simply unwrapped, leaving
             // their value on the stack.
@@ -933,6 +935,7 @@ impl Compiler<'_> {
         // to enter the function call straight away.
         self.compile(slot, node.argument().unwrap());
         self.compile(slot, node.lambda().unwrap());
+        self.emit_force(&node.lambda().unwrap());
         self.push_op(OpCode::OpCall, &node);
     }