From b1b38361724489c9227599b6f772b4f6944ce6b6 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 6 Jun 2022 11:44:27 -0400
Subject: [PATCH] fix rustup-toolchain without arguments

---
 rustup-toolchain | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rustup-toolchain b/rustup-toolchain
index 7e5d57349b9..ca5508e225a 100755
--- a/rustup-toolchain
+++ b/rustup-toolchain
@@ -30,7 +30,7 @@ else
     NEW_COMMIT="$1"
 fi
 echo "$NEW_COMMIT" > rust-version
-shift
+shift || true # don't fail if shifting fails
 
 # Check if we already are at that commit.
 CUR_COMMIT=$(rustc +miri --version -v 2>/dev/null | egrep "^commit-hash: " | cut -d " " -f 2)