From 0f7b85a9d6e0724c45cd425cf6e859202e3577c2 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Sat, 18 Jan 2025 12:04:31 +0100
Subject: [PATCH] fix: `cargo rustc --print` needs `unstable-options`

---
 crates/project-model/src/toolchain_info/rustc_cfg.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/project-model/src/toolchain_info/rustc_cfg.rs b/crates/project-model/src/toolchain_info/rustc_cfg.rs
index afcc81207949..4bf9b59e7d03 100644
--- a/crates/project-model/src/toolchain_info/rustc_cfg.rs
+++ b/crates/project-model/src/toolchain_info/rustc_cfg.rs
@@ -66,7 +66,7 @@ fn rustc_print_cfg(
         QueryConfig::Cargo(sysroot, cargo_toml) => {
             let mut cmd = sysroot.tool(Tool::Cargo, cargo_toml.parent());
             cmd.envs(extra_env);
-            cmd.args(["rustc"]).args(RUSTC_ARGS);
+            cmd.args(["rustc", "-Z", "unstable-options"]).args(RUSTC_ARGS);
             if let Some(target) = target {
                 cmd.args(["--target", target]);
             }