issue 2561, send all [bat error]s to stderr in default_error_handler

match default.

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## Features
 
 ## Bugfixes
-
+- issue 2561, send all [bat error]s to stderr in default_error_handler match default.
 - Fix `NO_COLOR` support, see #2767 (@acuteenvy)
 
 ## Other

src/error.rs

@@ -67,7 +67,15 @@ pub fn default_error_handler(error: &Error, output: &mut dyn Write) {
             .ok();
         }
         _ => {
-            writeln!(output, "{}: {}", Red.paint("[bat error]"), error).ok();
+            // default - always write [bat error] to stderr
+            let stderr = std::io::stderr();
+            writeln!(
+                &mut stderr.lock(),
+                "{}: {}",
+                Red.paint("[bat error]"),
+                error
+            )
+            .ok();
         }
     };
 }