From 84a9c55e1b86c06a8fd8430fda0763c3202eeb5f Mon Sep 17 00:00:00 2001
From: Daniel Han <danielhanchen@gmail.com>
Date: Sun, 5 Apr 2026 03:28:16 +0000
Subject: [PATCH] Fix critical: initialize _amd_gpu_radeon before case block

_amd_gpu_radeon was only set inside the */rocm*) case arm, so on
NVIDIA/CPU/macOS paths where TORCH_INDEX_URL does not contain "rocm",
the variable was unbound. With set -u (nounset) enabled, this crashes
the installer for every non-AMD user.

Move initialization to before the case block so it is always defined.
---
 install.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/install.sh b/install.sh
index 624eb108ac..7a123f5246 100755
--- a/install.sh
+++ b/install.sh
@@ -1159,9 +1159,9 @@ TORCH_INDEX_URL=$(get_torch_index_url)
 # Auto-detect GPU for AMD ROCm based
 # get_torch_index_url must have chosen */rocm*
 # (gfx in rocminfo or amd-smi list). Then require rocminfo "Marketing Name:.*Radeon".
+_amd_gpu_radeon=false
 case "$TORCH_INDEX_URL" in
     */rocm*)
-        _amd_gpu_radeon=false
         if _has_amd_rocm_gpu && command -v rocminfo >/dev/null 2>&1 && \
            rocminfo 2>/dev/null | grep -q 'Marketing Name:.*Radeon'; then
             _amd_gpu_radeon=true