fix(tvix/eval): ThunkSet does not need mutable pointers r/5885

Change-Id: Iea248870a0ea5d38cb02ff059c968fbd563570b6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8143
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI

1 files changed, 2 insertions, 2 deletions

diff --git a/tvix/eval/src/value/thunk.rs b/tvix/eval/src/value/thunk.rs
index 560e33244da3..1be3370b2377 100644
--- a/tvix/eval/src/value/thunk.rs
+++ b/tvix/eval/src/value/thunk.rs
@@ -478,13 +478,13 @@ impl Serialize for Thunk {
 /// The inner `HashSet` is not available on the outside, as it would be
 /// potentially unsafe to interact with the pointers in the set.
 #[derive(Default)]
-pub struct ThunkSet(HashSet<*mut ThunkRepr>);
+pub struct ThunkSet(HashSet<*const ThunkRepr>);
 
 impl ThunkSet {
     /// Check whether the given thunk has already been seen. Will mark the thunk
     /// as seen otherwise.
     pub fn insert(&mut self, thunk: &Thunk) -> bool {
-        let ptr: *mut ThunkRepr = thunk.0.as_ptr();
+        let ptr: *const ThunkRepr = thunk.0.as_ptr();
         self.0.insert(ptr)
     }
 }