From 2d2577cdec6121e57facd55a6355ed8bf0c2c9b1 Mon Sep 17 00:00:00 2001
From: klensy <klensy@users.noreply.github.com>
Date: Sun, 5 Jun 2022 07:02:32 +0300
Subject: [PATCH] typo: `-Zcodegen-backend=llvm -Cpasses=list` should work now

---
 compiler/rustc_driver/src/lib.rs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/compiler/rustc_driver/src/lib.rs b/compiler/rustc_driver/src/lib.rs
index 179a184536efa..1a7972716d3df 100644
--- a/compiler/rustc_driver/src/lib.rs
+++ b/compiler/rustc_driver/src/lib.rs
@@ -1055,13 +1055,7 @@ pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
     }
 
     if cg_flags.iter().any(|x| *x == "passes=list") {
-        let backend_name = debug_flags.iter().find_map(|x| {
-            if x.starts_with("codegen-backend=") {
-                Some(&x["codegen-backends=".len()..])
-            } else {
-                None
-            }
-        });
+        let backend_name = debug_flags.iter().find_map(|x| x.strip_prefix("codegen-backend="));
         get_codegen_backend(&None, backend_name).print_passes();
         return None;
     }