diff --git a/src/bootstrap/src/core/builder.rs b/src/bootstrap/src/core/builder.rs index c051b8183287e..23a5a954e62c2 100644 --- a/src/bootstrap/src/core/builder.rs +++ b/src/bootstrap/src/core/builder.rs @@ -2093,12 +2093,10 @@ impl<'a> Builder<'a> { rustdocflags.arg("--cfg=parallel_compiler"); } - // set rustc args passed from command line - let rustc_args = - self.config.cmd.rustc_args().iter().map(|s| s.to_string()).collect::<Vec<_>>(); - if !rustc_args.is_empty() { - cargo.env("RUSTFLAGS", &rustc_args.join(" ")); - } + // Pass the value of `--rustc-args` from test command. If it's not a test command, this won't set anything. + self.config.cmd.rustc_args().iter().for_each(|v| { + rustflags.arg(v); + }); Cargo { command: cargo,