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authorVincent Ambo <mail@tazj.in>2022-09-02T20·46+0300
committertazjin <tazjin@tvl.su>2022-09-08T12·53+0000
commitb83723a1edef90e4020b9b9af6c905d2badbedea (patch)
tree50150f08d0a18d85cfc7b21ab63d16f171469e39 /tvix
parent0c0ae50f024d48e9cc482dff164e5ba6bad4189d (diff)
fix(tvix/eval): force argument of builtins.length r/4750
Change-Id: Iaf94dfc7cb058f5c1c311066d92e01512e09cf71
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6417
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Diffstat (limited to 'tvix')
-rw-r--r--tvix/eval/src/builtins/mod.rs5
1 files changed, 4 insertions, 1 deletions
diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs
index d0ed834a9e2c..947854e6f00a 100644
--- a/tvix/eval/src/builtins/mod.rs
+++ b/tvix/eval/src/builtins/mod.rs
@@ -45,7 +45,10 @@ fn pure_builtins() -> Vec<Builtin> {
             let a = args.pop().unwrap();
             arithmetic_op!(a, b, /)
         }),
-        Builtin::new("length", 1, |args, _| {
+        Builtin::new("length", 1, |args, vm| {
+            if let Value::Thunk(t) = &args[0] {
+                t.force(vm)?;
+            }
             Ok(Value::Integer(args[0].to_list()?.len() as i64))
         }),
         Builtin::new("isAttrs", 1, |args, _| {