Added additional verification of status line

src/error.rs

@@ -75,6 +75,8 @@ pub const NO_CURRENT_POSITION_ERROR: &str = "Current position in status line is
 pub const NO_CURRENT_STATUS_ERROR: &str = "Current status is missing from the status line";
 pub const UNKNOWN_CURRENT_STATUS_ERROR: &str = "Invalid status in status line";
 pub const UNKNOWN_CURRRENT_PHASE_ERROR: &str = "Invalid phase in status line";
+pub const CURRENT_PHASE_LESS_THAN_ONE_ERROR: &str =
+    "Invalid phase in status line: phase must be 1 or greater";
 
 pub fn file_not_found(filetype: FileType) -> String {
     format!("{FILE_NOT_FOUND_ERROR} {}", filetype.to_string())

src/parser.rs

@@ -325,14 +325,22 @@ where
     match current_pass {
         Some(x) => {
             let x_location = get_next(current_status_location + 1, line, x);
-            x.parse::<u8>().unwrap_or_else(|_| {
+            let current_status = x.parse::<u8>().unwrap_or_else(|_| {
                 report_error(
                     &line_content,
                     x_location,
                     x,
                     error::UNKNOWN_CURRRENT_PHASE_ERROR,
                 )
             });
+            if current_status < 1 {
+                report_error(
+                    &line_content,
+                    x_location,
+                    x,
+                    error::CURRENT_PHASE_LESS_THAN_ONE_ERROR,
+                );
+            }
         }
         None => (),
     };