Avoid stack allocation in with_nix_path for Option::None

1 files changed, 1 insertions, 3 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 94f15799..0de90494 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -220,9 +220,7 @@ impl<'a, NP: ?Sized + NixPath>  NixPath for Option<&'a NP> {
         if let Some(nix_path) = *self {
             nix_path.with_nix_path(f)
         } else {
-            // TODO(#229): avoid extra stack allocation from [u8] impl by
-            // replacing with empty CStr.
-            b"".with_nix_path(f)
+            unsafe { CStr::from_ptr("\0".as_ptr() as *const _).with_nix_path(f) }
         }
     }
 }