From 6c068358e439a3b97dd82bc8aef1f67187c3d2ee Mon Sep 17 00:00:00 2001
From: teknium1 <127238744+teknium1@users.noreply.github.com>
Date: Sat, 4 Jul 2026 14:29:34 -0700
Subject: [PATCH] fix(vision): stdin=DEVNULL on rasterizer subprocess (stdin
 guard)

The salvaged #52688 rasterizer shell-out predates the TUI subprocess
stdin= guard; a rasterizer that prompts on stdin could hang the tool
under prompt_toolkit. DEVNULL it.
---
 tools/vision_tools.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/vision_tools.py b/tools/vision_tools.py
index b5e1a16119f..9cdfe865b10 100644
--- a/tools/vision_tools.py
+++ b/tools/vision_tools.py
@@ -289,7 +289,10 @@ def _rasterize_svg_to_png(svg_path: Path, out_path: Path) -> bool:
     ):
         if _shutil.which(cmd[0]):
             try:
-                _subprocess.run(cmd, check=True, capture_output=True, timeout=30)
+                _subprocess.run(
+                    cmd, check=True, capture_output=True, timeout=30,
+                    stdin=_subprocess.DEVNULL,
+                )
                 if out_path.exists() and out_path.stat().st_size > 0:
                     return True
             except Exception: