Directory walkers key visited directories by (dev, inode); stats skips non-regular or oversized .rs targets

apps/gridcraft-cli/src/check.rs

@@ -278,7 +278,7 @@ fn collect_inputs(inputs: &[String]) -> Discovery {
 }
 
 /// Returns false only when the global file budget stops traversal.
-fn walk(dir: &Path, depth: usize, out: &mut Discovery, seen: &mut std::collections::HashSet<u64>) -> bool {
+fn walk(dir: &Path, depth: usize, out: &mut Discovery, seen: &mut std::collections::HashSet<(u64, u64)>) -> bool {
     // A directory is visited once by identity (dev+inode on unix): several links to the same
     // directory are aliases, not exponential branches of the scan. Other platforms keep the
     // depth cap only.
@@ -286,8 +286,7 @@ fn walk(dir: &Path, depth: usize, out: &mut Discovery, seen: &mut std::collectio
     {
         use std::os::unix::fs::MetadataExt as _;
         if let Ok(m) = std::fs::metadata(dir)
-            && let Some(id) = m.dev().checked_mul(1 << 60).and_then(|d| d.checked_add(m.ino()))
-            && !seen.insert(id)
+            && !seen.insert((m.dev(), m.ino()))
         {
             return true;
         }