From 85b084f4bd5c61adf23ca0de08cfba3d23ef1cfc Mon Sep 17 00:00:00 2001 From: Ryan Prichard Date: Fri, 13 Mar 2015 23:49:44 -0700 Subject: [PATCH] Reject `-L ""`, `-L native=`, and other empty search paths. It wasn't clear to me that early_error was correct here, but it seems to work. This code is reachable from `rustdoc`, which is problematic, because early_error panics. rustc handles the panics gracefully (without ICEing or crashing), but rustdoc does not. It's not the first such rustdoc problem, though: $ rustdoc hello.rs --extern std=bad-std error: extern location for std does not exist: bad-std hello.rs:1:1: 1:1 error: can't find crate for `std` hello.rs:1 ^ error: aborting due to 2 previous errors thread '' panicked at 'Box', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libsyntax/diagnostic.rs:151 thread '' panicked at 'called `Result::unwrap()` on an `Err` value: "rustc failed"', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libcore/result.rs:744 thread '
' panicked at 'child thread None panicked', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libstd/thread.rs:661 --- src/librustc/session/search_paths.rs | 4 ++++ .../compile-fail/manual-link-bad-search-path.rs | 15 +++++++++++++++ 2 files changed, 19 insertions(+) create mode 100644 src/test/compile-fail/manual-link-bad-search-path.rs diff --git a/src/librustc/session/search_paths.rs b/src/librustc/session/search_paths.rs index f85fb303910..3c5d9744505 100644 --- a/src/librustc/session/search_paths.rs +++ b/src/librustc/session/search_paths.rs @@ -10,6 +10,7 @@ use std::slice; use std::path::{Path, PathBuf}; +use session::early_error; #[derive(Clone, Debug)] pub struct SearchPaths { @@ -50,6 +51,9 @@ impl SearchPaths { } else { (PathKind::All, path) }; + if path.is_empty() { + early_error("empty search path given via `-L`"); + } self.paths.push((kind, PathBuf::new(path))); } diff --git a/src/test/compile-fail/manual-link-bad-search-path.rs b/src/test/compile-fail/manual-link-bad-search-path.rs new file mode 100644 index 00000000000..2bf61cbe24c --- /dev/null +++ b/src/test/compile-fail/manual-link-bad-search-path.rs @@ -0,0 +1,15 @@ +// Copyright 2015 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// compile-flags:-L native= +// error-pattern: empty search path given via `-L` + +fn main() { +}