make assert_stderr_contains print its contents on panic

Author: Oneirical

src/doc/book

@@ -236,18 +236,6 @@ impl Rustc {
         self
     }
 
-    /// Add an extra argument to prepend the linker invocation, via `-Zpre-link-arg`.
-    pub fn pre_link_arg(&mut self, link_arg: &str) -> &mut Self {
-        self.cmd.arg(format!("-Zpre-link-arg={link_arg}"));
-        self
-    }
-
-    /// Add multiple extra arguments to the linker invocation, via `-Zpre-link-args`.
-    pub fn pre_link_args(&mut self, link_args: &str) -> &mut Self {
-        self.cmd.arg(format!("-Zpre-link-args={link_args}"));
-        self
-    }
-
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
         self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());

src/tools/cargo

@@ -3,25 +3,28 @@
 // checks that linker arguments remain intact and in the order they were originally passed in.
 // See https://github.com/rust-lang/rust/pull/70665
 
+//@ ignore-msvc
+// Reason: the ld linker does not exist on Windows.
+
 use run_make_support::rustc;
 
 fn main() {
     rustc()
         .input("empty.rs")
         .linker_flavor("ld")
         .link_arg("a")
-        .link_args("\"b c\"")
-        .link_args("\"d e\"")
+        .link_args("b c")
+        .link_args("d e")
         .link_arg("f")
         .run_fail()
-        .assert_stderr_contains("\"a\" \"b\" \"c\" \"d\" \"e\" \"f\"");
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
     rustc()
         .input("empty.rs")
         .linker_flavor("ld")
-        .pre_link_arg("a")
-        .pre_link_args("\"b c\"")
-        .pre_link_args("\"d e\"")
-        .pre_link_arg("f")
+        .arg("-Zpre-link-arg=a")
+        .arg("-Zpre-link-args=b c")
+        .arg("-Zpre-link-args=d e")
+        .arg("-Zpre-link-arg=f")
         .run_fail()
-        .assert_stderr_contains("\"a\" \"b\" \"c\" \"d\" \"e\" \"f\"");
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
 }

src/tools/run-make-support/src/rustc.rs

@@ -8,18 +8,12 @@
 //@ ignore-cross-compile
 
 use run_make_support::fs_wrapper;
-use run_make_support::{cwd, run, rustc};
+use run_make_support::{run, rust_lib_name, rustc, test_while_readonly};
 
 fn main() {
     rustc().input("lib.rs").run();
-    let entries = fs_wrapper::read_dir(cwd());
-    for entry in entries {
-        if entry.path().extension().and_then(|s| s.to_str()) == Some("rlib") {
-            let mut perms = fs_wrapper::metadata(entry.path()).permissions();
-            perms.set_readonly(true);
-            fs_wrapper::set_permissions(entry.path(), perms);
-        }
-    }
-    rustc().input("main.rs").arg("-Clto").run();
-    run("main");
+    test_while_readonly(rust_lib_name("lib"), || {
+        rustc().input("main.rs").arg("-Clto").run();
+        run("main");
+    });
 }