got it working by turning it into a vec

crates/nu-command/src/filters/last.rs

@@ -2,7 +2,7 @@ use nu_engine::CallExt;
 
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value};
+use nu_protocol::{IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape};
 use std::convert::TryInto;
 
 #[derive(Clone)]
@@ -33,12 +33,38 @@ impl Command for Last {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let rows: Option<i64> = call.opt(engine_state, stack, 0)?;
+        let v: Vec<_> = input.into_iter().collect();
+        let vlen: i64 = v.len() as i64;
+        let beginning_rows_to_skip = rows_to_skip(vlen, rows);
+
+        /*
+                let end_rows_desired = if let Some(quantity) = rows {
+                    quantity
+                } else {
+                    1
+                };
+
+                let beginning_rows_to_skip = if end_rows_desired < v.len() {
+                    v.len() - end_rows_desired
+                } else {
+                    0
+                };
+        */
+
+        let iter = v
+            .into_iter()
+            .skip(beginning_rows_to_skip.try_into().unwrap());
+
+        //let iter = v.into_iter().skip(beginning_rows_to_skip);
+
+        /*
                 let iter_count: i64 = input.into_iter().count() as i64;
                 let beginning_rows_to_skip = rows_to_skip(iter_count, rows);
                 dbg!(beginning_rows_to_skip);
-
+        */
         // let beginning_rows_to_skip = 3;
 
+        /*
                 match input {
                     PipelineData::Stream(stream) => {
                         dbg!("Stream");
@@ -58,6 +84,9 @@ impl Command for Last {
                         Ok(PipelineData::Value(Value::Nothing { span: call.head }))
                     }
                 }
+        */
+
+        Ok(iter.into_pipeline_data())
 
         //        Ok(PipelineData::Value(Value::Nothing { span: call.head }))
     }