1 files changed, 3 insertions, 0 deletions

diff --git a/src/lisp/error.rs b/src/lisp/error.rs
index f905e6d..f323bb8 100644
--- a/src/lisp/error.rs
+++ b/src/lisp/error.rs
@@ -1,6 +1,7 @@
 use crate::lisp::{
     expr::{Arity, LispExpr},
     lex::{Span, SpanDisplay},
+    number::LispNumber,
 };
 
 use std::{fmt, io};
@@ -98,6 +99,7 @@ pub enum EvalError {
     TypeMismatch,
     NoFileName,
     AccessEmptyList,
+    InvalidCoordinates((LispNumber, LispNumber)),
     AssertionError { expected: LispExpr, got: LispExpr },
     ScriptLoadError(io::Error),
     CustomInternal(&'static str),
@@ -125,6 +127,7 @@ impl fmt::Display for EvalError {
             Self::DivByZero => write!(f, "attempt to divide by zero"),
             Self::NoFileName => write!(f, "no file name specified"),
             Self::AccessEmptyList => write!(f, "attempted to access empty list"),
+            Self::InvalidCoordinates((x, y)) => write!(f, "invalid coordinates: {} {}", x, y),
             Self::AssertionError { expected, got } => {
                 write!(f, "assertion error: expected `{}` got `{}`", expected, got)
             }