fix: Don't panic but set null type if type is unknown

pola-rs · Jan 9, 2025 · 26d7375 · 26d7375
1 parent 323b88c
commit 26d7375
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/crates/polars-core/src/series/ops/null.rs b/crates/polars-core/src/series/ops/null.rs
@@ -89,7 +89,7 @@ impl Series {
             },
             DataType::Null => Series::new_null(name, size),
             DataType::Unknown(kind) => {
-                let dtype = kind.materialize().expect("expected known type");
+                let dtype = kind.materialize().unwrap_or(DataType::Null);
                 Series::full_null(name, size, &dtype)
             },
             #[cfg(feature = "object")]