So-called zero-cost abstractions

Author: workingjubilee

src/symbolize/gimli/parse_running_mmaps_unix.rs

@@ -95,7 +95,10 @@ impl FromStr for MapsEntry {
         // let offset_str = parts.next().ok_or(missing_field)?;
         // let dev_str = parts.next().ok_or(missing_field)?;
         // let inode_str = parts.next().ok_or(missing_field)?;
-        let pathname_str = parts.skip(4).next().unwrap_or(""); // pathname may be omitted.
+        for _ in 0..4 {
+            let _ = parts.next().ok_or(missing_field)?;
+        }
+        let pathname_str = parts.next().unwrap_or(""); // pathname may be omitted.
 
         let hex = |s| usize::from_str_radix(s, 16).map_err(|_| parse_err);
         let address = if let Some((start, limit)) = range_str.split_once('-') {