find: visit nothing when -mindepth exceeds -maxdepth

src/find/mod.rs

@@ -211,6 +211,16 @@ fn process_dir(
     matcher: &dyn matchers::Matcher,
     quit: &mut bool,
 ) -> i32 {
+    // No depth can satisfy both bounds when -mindepth exceeds -maxdepth, so GNU
+    // find visits nothing at all. walkdir clamps min_depth down to max_depth
+    // instead (see `WalkDir::min_depth`), which would make us descend anyway, so
+    // handle the empty traversal ourselves.
+    if config.min_depth > config.max_depth {
+        let mut matcher_io = matchers::MatcherIO::new(deps);
+        matcher.finished(&mut matcher_io);
+        return matcher_io.exit_code();
+    }
+
     let mut walkdir = WalkDir::new(dir)
         .contents_first(config.depth_first)
         .max_depth(config.max_depth)

tests/test_find.rs

@@ -1130,6 +1130,40 @@ fn find_ls_unmapped_owner_renders_numeric_id() {
         .stdout_contains(unmapped.to_string());
 }
 
+#[test]
+fn find_mindepth_greater_than_maxdepth() {
+    ucmd()
+        .args(&["./test_data/depth", "-mindepth", "2", "-maxdepth", "1"])
+        .succeeds()
+        .no_stderr()
+        .no_stdout();
+}
+
+#[test]
+fn find_maxdepth_less_than_mindepth_reversed_order() {
+    ucmd()
+        .args(&["./test_data/depth", "-maxdepth", "1", "-mindepth", "2"])
+        .succeeds()
+        .no_stderr()
+        .no_stdout();
+}
+
+#[test]
+fn find_mindepth_greater_than_maxdepth_depth_first() {
+    ucmd()
+        .args(&[
+            "./test_data/depth",
+            "-mindepth",
+            "2",
+            "-maxdepth",
+            "1",
+            "-depth",
+        ])
+        .succeeds()
+        .no_stderr()
+        .no_stdout();
+}
+
 #[test]
 #[cfg(unix)]
 fn find_slashes() {