handled some unwraps in cd

error reporting now blames the function call span instead of the errored command inside the function

src/builtin/cd.rs

@@ -42,8 +42,16 @@ pub fn cd(node: Node, job: &mut JobBldr) -> ShResult<()> {
     ));
   }
 
-  env::set_current_dir(new_dir).unwrap();
-  let new_dir = env::current_dir().unwrap();
+  if let Err(e) = env::set_current_dir(new_dir) {
+		return Err(ShErr::full(
+			ShErrKind::ExecFail,
+			format!("cd: Failed to change directory: {}", e),
+			span,
+		));
+	}
+  let new_dir = env::current_dir().map_err(
+		|e| ShErr::full(ShErrKind::ExecFail, format!("cd: Failed to get current directory: {}", e), span)
+	)?;
   unsafe { env::set_var("PWD", new_dir) };
 
   state::set_status(0);

src/parse/execute.rs

@@ -319,7 +319,7 @@ impl Dispatcher {
 						state::set_status(*code);
 						Ok(())
 					}
-					_ => Err(e),
+					_ => Err(e).blame(blame),
 				}
 			} else {
 				Ok(())