Guard against integer overflow in release mode

Author: jhpratt

time-macros/src/format_description/lexer.rs

@@ -128,7 +128,7 @@ pub(super) fn lex<const VERSION: u8>(
 ) -> Lexed<impl Iterator<Item = Result<Token<'_>, Error>>> {
     assert!(version!(1..=2));
 
-    let mut depth: u8 = 0;
+    let mut depth: u32 = 0;
     let mut iter = attach_location(input.iter(), proc_span).peekable();
     let mut second_bracket_location = None;
 

time/src/format_description/parse/lexer.rs

@@ -159,7 +159,7 @@ pub(super) fn lex<const VERSION: usize>(
 ) -> Lexed<impl Iterator<Item = Result<Token<'_>, Error>>> {
     validate_version!(VERSION);
 
-    let mut depth: u8 = 0;
+    let mut depth: u32 = 0;
     let mut iter = attach_location(input.iter()).peekable();
     let mut second_bracket_location = None;