Move frame error message

crates/polars-core/src/frame/mod.rs

@@ -1536,14 +1536,7 @@ impl DataFrame {
         let mut names = PlHashSet::with_capacity(cols.len());
         for name in cols {
             if !names.insert(name.as_str()) {
-                let msg = format!(
-                    "the name: '{}' passed to `select` is duplicate\n\n\
-                    It's possible that multiple expressions are returning the same default column name. \
-                    If this is the case, try renaming the columns with `.alias(\"new_name\")` to avoid \
-                    duplicate column names.",
-                    name
-                );
-                return Err(PolarsError::ComputeError(msg.into()));
+                polars_bail!(duplicate = name);
             }
         }
         Ok(())

crates/polars-lazy/src/physical_plan/executors/projection_utils.rs

@@ -284,7 +284,17 @@ pub(super) fn check_expand_literals(
                 all_equal_len = false;
             }
             let name = s.name();
-            polars_ensure!(names.insert(name), duplicate = name);
+
+            if !names.insert(name) {
+                let msg = format!(
+                    "the name: '{}' passed to `select` is duplicate\n\n\
+                    It's possible that multiple expressions are returning the same default column \
+                    name. If this is the case, try renaming the columns with \
+                    `.alias(\"new_name\")` to avoid duplicate column names.",
+                    name
+                );
+                return Err(PolarsError::Duplicate(msg.into()));
+            }
         }
     }
     // If all series are the same length it is ok. If not we can broadcast Series of length one.