fix: Fix libc::write argument type. (#103)

pola-rs · Sep 12, 2024 · 632776a · 632776a
1 parent 60c487f
commit 632776a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/pyo3-polars/src/alloc.rs b/pyo3-polars/src/alloc.rs
@@ -80,7 +80,9 @@ impl PolarsAllocator {
             if r.is_none() {
                 // Do not use eprintln; it may alloc.
                 let msg = b"failed to get allocator capsule\n";
-                unsafe { libc::write(2, msg.as_ptr() as *const libc::c_void, msg.len()) };
+                // Message length type is platform-dependent.
+                let msg_len = msg.len().try_into().unwrap();
+                unsafe { libc::write(2, msg.as_ptr() as *const libc::c_void, msg_len) };
             }
             r.unwrap_or(&FALLBACK_ALLOCATOR_CAPSULE)
         })