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// Issue #66530: We would ICE if someone compiled with `-o /dev/null`,
// because we would try to generate auxiliary files in `/dev/` (which
// at least the OS X file system rejects).
//
// An attempt to `-Ztemps-dir` into a directory we cannot write into should
// indeed be an error; but not an ICE.
//
// However, some folks run tests as root, which can write `/dev/` and end
// up clobbering `/dev/null`. Instead we'll use an inaccessible path, which
// also used to ICE, but even root can't magically write there.
//
// Note that `-Ztemps-dir` uses `create_dir_all` so it is not sufficient to
// use a directory with non-existing parent like `/does-not-exist/output`.
// See https://github.com/rust-lang/rust/issues/66530
//@ ignore-riscv64
// FIXME: The riscv64gc-gnu build container runs as root, and can always write
// into `inaccessible/tmp`. Ideally, the riscv64-gnu docker container
// would use a non-root user, but this leads to issues with
// `mkfs.ext4 -d`, as well as mounting a loop device for the rootfs.
//@ ignore-arm
// Reason: linker error on `armhf-gnu`
//@ ignore-windows
// Reason: `set_readonly` has no effect on directories
// and does not prevent modification.
use run_make_support::{rfs, rustc, test_while_readonly};
fn main() {
// Create an inaccessible directory.
rfs::create_dir("inaccessible");
test_while_readonly("inaccessible", || {
// Run rustc with `-Z temps-dir` set to a directory *inside* the inaccessible one,
// so that it can't create `tmp`.
rustc()
.input("program.rs")
.arg("-Ztemps-dir=inaccessible/tmp")
.run_fail()
.assert_stderr_contains(
"failed to find or create the directory specified by `--temps-dir`",
);
});
}
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