From 5c2724fd2273ca0263e51c4246ef11f4fc697663 Mon Sep 17 00:00:00 2001
From: Alex Zenla <alex@edera.dev>
Date: Sat, 26 Sep 2026 18:12:21 -0700
Subject: [PATCH] fix(env): filter all ASCII control characters from leading
 args

The check for unprintable leading arguments added by firmware used
c < 0x1f, which missed 0x1f itself. Use is_ascii_control() instead.
---
 crates/eficore/src/env.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/eficore/src/env.rs b/crates/eficore/src/env.rs
index ccfb7dc..f054f60 100644
--- a/crates/eficore/src/env.rs
+++ b/crates/eficore/src/env.rs
@@ -52,7 +52,7 @@ pub fn args() -> Result<Vec<String>> {
                 .next()
                 // Filter out unprintable characters and backticks.
                 // Both of which have been observed in the wild.
-                .map(|c| c < 0x1f as char || c == '`')
+                .map(|c| c.is_ascii_control() || c == '`')
                 .unwrap_or(false)
         })
         .collect();