From 07389055f10cb09097b162fa0ac62b542576a1fb Mon Sep 17 00:00:00 2001
From: Johannes Altmanninger <aclopte@gmail.com>
Date: Tue, 9 Dec 2025 11:40:37 +0100
Subject: [PATCH] fish_indent: handle invalid arguments

---
 src/builtins/fish_indent.rs | 18 +++++++++++++++++-
 tests/checks/indent.fish    |  3 +++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/builtins/fish_indent.rs b/src/builtins/fish_indent.rs
index 5d921d7c6..3077e67bd 100644
--- a/src/builtins/fish_indent.rs
+++ b/src/builtins/fish_indent.rs
@@ -974,7 +974,23 @@ enum OutputType {
             '\x02' => output_type = OutputType::Ansi,
             '\x03' => output_type = OutputType::PygmentsCsv,
             'c' => output_type = OutputType::Check,
-            _ => return Err(STATUS_CMD_ERROR),
+            ';' => {
+                streams.err.append(wgettext_fmt!(
+                    BUILTIN_ERR_UNEXP_ARG,
+                    "fish_indent",
+                    w.argv[w.wopt_index - 1]
+                ));
+                return Err(STATUS_CMD_ERROR);
+            }
+            '?' => {
+                streams.err.append(wgettext_fmt!(
+                    BUILTIN_ERR_UNKNOWN,
+                    "fish_indent",
+                    w.argv[w.wopt_index - 1]
+                ));
+                return Err(STATUS_CMD_ERROR);
+            }
+            _ => panic!(),
         }
     }
 
diff --git a/tests/checks/indent.fish b/tests/checks/indent.fish
index ff8dd09da..a6db91e9b 100644
--- a/tests/checks/indent.fish
+++ b/tests/checks/indent.fish
@@ -2,6 +2,9 @@
 # Test file for fish_indent
 # Note that littlecheck ignores leading whitespace, so we have to use {{    }} to explicitly match it.
 
+fish_indent --no-such-option
+#CHECKERR: fish_indent: --no-such-option: unknown option
+
 echo 'echo foo \\
 | cat' | $fish_indent
 #CHECK: echo foo \