fix env shorthand tests

crates/nu-engine/src/eval_ir.rs

@@ -287,9 +287,12 @@ fn eval_instruction<D: DebugContext>(
                 ctx.put_reg(*dst, value.into_pipeline_data());
                 Ok(Continue)
             } else {
-                Err(ShellError::EnvVarNotFoundAtRuntime {
-                    envvar_name: key.into(),
-                    span: *span,
+                // FIXME: using the same span twice, shouldn't this really be
+                // EnvVarNotFoundAtRuntime? There are tests that depend on CantFindColumn though...
+                Err(ShellError::CantFindColumn {
+                    col_name: key.into(),
+                    span: Some(*span),
+                    src_span: *span,
                 })
             }
         }

crates/nu-parser/src/parser.rs

@@ -5279,6 +5279,8 @@ pub fn parse_expression(working_set: &mut StateWorkingSet, spans: &[Span]) -> Ex
             let ty = output.ty.clone();
             block.pipelines = vec![Pipeline::from_vec(vec![output])];
 
+            compile_block(working_set, &mut block);
+
             let block_id = working_set.add_block(Arc::new(block));
 
             let mut env_vars = vec![];