removed placeholder text in prompt

cd no longer panics if the given directory doesn't exist (wtf?)

src/builtin/cd.rs

@@ -1,8 +1,9 @@
-use crate::{jobs::JobBldr, libsh::error::ShResult, parse::{NdRule, Node}, prelude::*, state::{self}};
+use crate::{jobs::JobBldr, libsh::error::{ShErr, ShErrKind, ShResult}, parse::{NdRule, Node}, prelude::*, state::{self}};
 
 use super::setup_builtin;
 
 pub fn cd(node: Node, job: &mut JobBldr) -> ShResult<()> {
+	let span = node.get_span();
 	let NdRule::Command { assignments: _, argv } = node.class else {
 		unreachable!()
 	};
@@ -15,6 +16,26 @@ pub fn cd(node: Node, job: &mut JobBldr) -> ShResult<()> {
 		PathBuf::from(env::var("HOME").unwrap())
 	};
 
+	if !new_dir.exists() {
+		return Err(
+			ShErr::full(
+				ShErrKind::ExecFail,
+				format!("cd: No such file or directory '{}'",new_dir.display()),
+				span,
+			)
+		)
+	}
+
+	if !new_dir.is_dir() {
+		return Err(
+			ShErr::full(
+				ShErrKind::ExecFail,
+				format!("cd: Not a directory '{}'",new_dir.display()),
+				span,
+			)
+		)
+	}
+
 	env::set_current_dir(new_dir).unwrap();
 	let new_dir = env::current_dir().unwrap();
 	env::set_var("PWD", new_dir);