diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index a2d42a00c36..b7f697f39ae 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -49,7 +49,315 @@ static EXCEPTIONS: &'static [&'static str] = &[
 ];
 
 // Whitelist of crates rustc is allowed to depend on. Avoid adding to the list if possible.
-static WHITELIST: &'static [(&'static str, &'static str)] = &[];
+static WHITELIST: &'static [(&'static str, &'static str)] = &[
+//    ("advapi32-sys", "0.2.0"),
+//    ("aho-corasick", "0.5.3"),
+//    ("aho-corasick", "0.6.4"),
+//    ("alloc", "0.0.0"),
+//    ("alloc_jemalloc", "0.0.0"),
+//    ("alloc_system", "0.0.0"),
+//    ("ansi_term", "0.10.2"),
+//    ("ar", "0.3.1"),
+//    ("arena", "0.0.0"),
+//    ("atty", "0.2.6"),
+//    ("backtrace", "0.3.5"),
+//    ("backtrace-sys", "0.1.16"),
+//    ("bin_lib", "0.1.0"),
+//    ("bitflags", "0.7.0"),
+//    ("bitflags", "0.9.1"),
+//    ("bitflags", "1.0.1"),
+//    ("bootstrap", "0.0.0"),
+//    ("borrow_error", "0.1.0"),
+//    ("bufstream", "0.1.3"),
+//    ("build-manifest", "0.1.0"),
+//    ("build_helper", "0.1.0"),
+//    ("byteorder", "1.2.1"),
+//    ("cargo", "0.26.0"),
+//    ("cargo_metadata", "0.2.3"),
+//    ("cargo_metadata", "0.4.0"),
+//    ("cargotest", "0.1.0"),
+//    ("cargotest2", "0.1.0"),
+//    ("cc", "1.0.4"),
+//    ("cfg-if", "0.1.2"),
+//    ("chrono", "0.4.0"),
+//    ("clap", "2.29.0"),
+//    ("clippy", "0.0.186"),
+//    ("clippy-mini-macro-test", "0.2.0"),
+//    ("clippy_lints", "0.0.186"),
+//    ("cmake", "0.1.29"),
+//    ("coco", "0.1.1"),
+//    ("commoncrypto", "0.2.0"),
+//    ("commoncrypto-sys", "0.2.0"),
+//    ("compiler_builtins", "0.0.0"),
+//    ("compiletest", "0.0.0"),
+//    ("compiletest_rs", "0.3.6"),
+//    ("completion", "0.1.0"),
+//    ("core", "0.0.0"),
+//    ("core-foundation", "0.4.6"),
+//    ("core-foundation-sys", "0.4.6"),
+//    ("crates-io", "0.15.0"),
+//    ("crossbeam", "0.2.12"),
+//    ("crossbeam", "0.3.2"),
+//    ("crypto-hash", "0.3.0"),
+//    ("curl", "0.4.11"),
+//    ("curl-sys", "0.4.1"),
+//    ("deglob", "0.1.0"),
+//    ("derive-new", "0.5.0"),
+//    ("diff", "0.1.11"),
+//    ("dlmalloc", "0.0.0"),
+//    ("docopt", "0.8.3"),
+//    ("dtoa", "0.4.2"),
+//    ("duct", "0.8.2"),
+//    ("either", "1.4.0"),
+//    ("endian-type", "0.1.2"),
+//    ("enum_primitive", "0.1.1"),
+//    ("env_logger", "0.3.5"),
+//    ("env_logger", "0.4.3"),
+//    ("env_logger", "0.5.3"),
+//    ("error-chain", "0.11.0"),
+//    ("error-chain", "0.8.1"),
+//    ("error_index_generator", "0.0.0"),
+//    ("failure", "0.1.1"),
+//    ("failure_derive", "0.1.1"),
+//    ("features", "0.1.0"),
+//    ("filetime", "0.1.15"),
+//    ("find_all_refs_no_cfg_test", "0.1.0"),
+//    ("find_impls", "0.1.0"),
+//    ("flate2", "1.0.1"),
+//    ("fmt_macros", "0.0.0"),
+//    ("fnv", "1.0.6"),
+//    ("foreign-types", "0.3.2"),
+//    ("foreign-types-shared", "0.1.1"),
+//    ("fs2", "0.4.3"),
+//    ("fuchsia-zircon", "0.3.3"),
+//    ("fuchsia-zircon-sys", "0.3.3"),
+//    ("futures", "0.1.17"),
+//    ("getopts", "0.2.15"),
+//    ("git2", "0.6.11"),
+//    ("git2-curl", "0.7.0"),
+//    ("glob", "0.2.11"),
+//    ("globset", "0.2.1"),
+//    ("graphviz", "0.0.0"),
+//    ("hamcrest", "0.1.1"),
+//    ("handlebars", "0.29.1"),
+//    ("hex", "0.2.0"),
+//    ("hex", "0.3.1"),
+//    ("home", "0.3.0"),
+//    ("idna", "0.1.4"),
+//    ("if_chain", "0.1.2"),
+//    ("ignore", "0.3.1"),
+//    ("infer_bin", "0.1.0"),
+//    ("infer_custom_bin", "0.1.0"),
+//    ("infer_lib", "0.1.0"),
+//    ("installer", "0.0.0"),
+//    ("is-match", "0.1.0"),
+//    ("itertools", "0.6.5"),
+//    ("itertools", "0.7.6"),
+//    ("itoa", "0.3.4"),
+//    ("jobserver", "0.1.9"),
+//    ("json", "0.11.12"),
+//    ("jsonrpc-core", "8.0.1"),
+//    ("kernel32-sys", "0.2.2"),
+//    ("languageserver-types", "0.30.0"),
+//    ("lazy_static", "0.2.11"),
+//    ("lazy_static", "1.0.0"),
+//    ("lazycell", "0.5.1"),
+//    ("libc", "0.0.0"),
+//    ("libc", "0.2.36"),
+//    ("libgit2-sys", "0.6.19"),
+//    ("libssh2-sys", "0.2.6"),
+//    ("libz-sys", "1.0.18"),
+//    ("linkchecker", "0.1.0"),
+//    ("log", "0.3.9"),
+//    ("log", "0.4.1"),
+//    ("log_settings", "0.1.1"),
+//    ("lzma-sys", "0.1.9"),
+//    ("matches", "0.1.6"),
+//    ("mdbook", "0.1.2"),
+//    ("memchr", "0.1.11"),
+//    ("memchr", "2.0.1"),
+//    ("miniz-sys", "0.1.10"),
+//    ("miow", "0.2.1"),
+//    ("miri", "0.1.0"),
+//    ("multiple_bins", "0.1.0"),
+//    ("net2", "0.2.31"),
+//    ("nibble_vec", "0.0.3"),
+//    ("nix", "0.8.1"),
+//    ("num", "0.1.41"),
+//    ("num-bigint", "0.1.41"),
+//    ("num-complex", "0.1.41"),
+//    ("num-integer", "0.1.35"),
+//    ("num-iter", "0.1.34"),
+//    ("num-rational", "0.1.40"),
+//    ("num-traits", "0.1.41"),
+//    ("num_cpus", "1.8.0"),
+//    ("open", "1.2.1"),
+//    ("openssl", "0.9.23"),
+//    ("openssl-probe", "0.1.2"),
+//    ("openssl-sys", "0.9.24"),
+//    ("os_pipe", "0.5.1"),
+//    ("owning_ref", "0.3.3"),
+//    ("panic_abort", "0.0.0"),
+//    ("panic_unwind", "0.0.0"),
+//    ("parking_lot", "0.5.3"),
+//    ("parking_lot_core", "0.2.9"),
+//    ("percent-encoding", "1.0.1"),
+//    ("pest", "0.3.3"),
+//    ("pkg-config", "0.3.9"),
+//    ("proc_macro", "0.0.0"),
+//    ("profiler_builtins", "0.0.0"),
+//    ("pulldown-cmark", "0.0.15"),
+//    ("pulldown-cmark", "0.1.0"),
+//    ("quick-error", "1.2.1"),
+//    ("quine-mc_cluskey", "0.2.4"),
+//    ("quote", "0.3.15"),
+//    ("racer", "2.0.12"),
+//    ("radix_trie", "0.1.2"),
+//    ("rand", "0.3.20"),
+//    ("rayon", "0.9.0"),
+//    ("rayon-core", "1.3.0"),
+//    ("redox_syscall", "0.1.37"),
+//    ("redox_termios", "0.1.1"),
+//    ("reformat", "0.1.0"),
+//    ("reformat_with_range", "0.1.0"),
+//    ("regex", "0.1.80"),
+//    ("regex", "0.2.5"),
+//    ("regex-syntax", "0.3.9"),
+//    ("regex-syntax", "0.4.2"),
+//    ("remote-test-client", "0.1.0"),
+//    ("remote-test-server", "0.1.0"),
+//    ("rls", "0.125.0"),
+//    ("rls-analysis", "0.11.0"),
+//    ("rls-blacklist", "0.1.0"),
+//    ("rls-data", "0.15.0"),
+//    ("rls-rustc", "0.2.1"),
+//    ("rls-span", "0.4.0"),
+//    ("rls-vfs", "0.4.4"),
+//    ("rustbook", "0.1.0"),
+//    ("rustc", "0.0.0"),
+//    ("rustc-ap-rustc_cratesio_shim", "29.0.0"),
+//    ("rustc-ap-rustc_data_structures", "29.0.0"),
+//    ("rustc-ap-rustc_errors", "29.0.0"),
+//    ("rustc-ap-serialize", "29.0.0"),
+//    ("rustc-ap-syntax", "29.0.0"),
+//    ("rustc-ap-syntax_pos", "29.0.0"),
+//    ("rustc-demangle", "0.1.5"),
+//    ("rustc-main", "0.0.0"),
+//    ("rustc-serialize", "0.3.24"),
+//    ("rustc_allocator", "0.0.0"),
+//    ("rustc_apfloat", "0.0.0"),
+//    ("rustc_asan", "0.0.0"),
+//    ("rustc_back", "0.0.0"),
+//    ("rustc_binaryen", "0.0.0"),
+//    ("rustc_borrowck", "0.0.0"),
+//    ("rustc_const_eval", "0.0.0"),
+//    ("rustc_const_math", "0.0.0"),
+//    ("rustc_cratesio_shim", "0.0.0"),
+//    ("rustc_data_structures", "0.0.0"),
+//    ("rustc_driver", "0.0.0"),
+//    ("rustc_errors", "0.0.0"),
+//    ("rustc_incremental", "0.0.0"),
+//    ("rustc_lint", "0.0.0"),
+//    ("rustc_llvm", "0.0.0"),
+//    ("rustc_lsan", "0.0.0"),
+//    ("rustc_metadata", "0.0.0"),
+//    ("rustc_mir", "0.0.0"),
+//    ("rustc_msan", "0.0.0"),
+//    ("rustc_passes", "0.0.0"),
+//    ("rustc_platform_intrinsics", "0.0.0"),
+//    ("rustc_plugin", "0.0.0"),
+//    ("rustc_privacy", "0.0.0"),
+//    ("rustc_resolve", "0.0.0"),
+//    ("rustc_save_analysis", "0.0.0"),
+//    ("rustc_trans", "0.0.0"),
+//    ("rustc_trans_utils", "0.0.0"),
+//    ("rustc_tsan", "0.0.0"),
+//    ("rustc_typeck", "0.0.0"),
+//    ("rustdoc", "0.0.0"),
+//    ("rustdoc-themes", "0.1.0"),
+//    ("rustdoc-tool", "0.0.0"),
+//    ("rustfmt-nightly", "0.3.8"),
+//    ("same-file", "0.1.3"),
+//    ("same-file", "1.0.2"),
+//    ("schannel", "0.1.10"),
+//    ("scoped-tls", "0.1.0"),
+//    ("scopeguard", "0.1.2"),
+//    ("scopeguard", "0.3.3"),
+//    ("semver", "0.6.0"),
+//    ("semver", "0.8.0"),
+//    ("semver", "0.9.0"),
+//    ("semver-parser", "0.7.0"),
+//    ("serde", "1.0.27"),
+//    ("serde_derive", "1.0.27"),
+//    ("serde_derive_internals", "0.19.0"),
+//    ("serde_ignored", "0.0.4"),
+//    ("serde_json", "1.0.9"),
+//    ("serialize", "0.0.0"),
+//    ("shared_child", "0.2.1"),
+//    ("shell-escape", "0.1.3"),
+//    ("shlex", "0.1.1"),
+//    ("smallvec", "0.6.0"),
+//    ("socket2", "0.3.0"),
+//    ("stable_deref_trait", "1.0.0"),
+//    ("std", "0.0.0"),
+//    ("std_unicode", "0.0.0"),
+//    ("strsim", "0.6.0"),
+//    ("syn", "0.11.11"),
+//    ("synom", "0.11.3"),
+//    ("synstructure", "0.6.1"),
+//    ("syntax", "0.0.0"),
+//    ("syntax_ext", "0.0.0"),
+//    ("syntax_pos", "0.0.0"),
+//    ("syntex_errors", "0.52.0"),
+//    ("syntex_pos", "0.52.0"),
+//    ("syntex_syntax", "0.52.0"),
+//    ("tar", "0.4.14"),
+//    ("tempdir", "0.3.5"),
+//    ("term", "0.0.0"),
+//    ("term", "0.4.6"),
+//    ("termcolor", "0.3.3"),
+//    ("termion", "1.5.1"),
+//    ("test", "0.0.0"),
+//    ("textwrap", "0.9.0"),
+//    ("thread-id", "2.0.0"),
+//    ("thread_local", "0.2.7"),
+//    ("thread_local", "0.3.5"),
+//    ("tidy", "0.1.0"),
+//    ("time", "0.1.39"),
+//    ("toml", "0.2.1"),
+//    ("toml", "0.4.5"),
+//    ("toml-query", "0.6.0"),
+//    ("unicode-bidi", "0.3.4"),
+//    ("unicode-normalization", "0.1.5"),
+//    ("unicode-segmentation", "1.2.0"),
+//    ("unicode-width", "0.1.4"),
+//    ("unicode-xid", "0.0.3"),
+//    ("unicode-xid", "0.0.4"),
+//    ("unreachable", "1.0.0"),
+//    ("unstable-book-gen", "0.1.0"),
+//    ("unwind", "0.0.0"),
+//    ("url", "1.6.0"),
+//    ("url_serde", "0.2.0"),
+//    ("userenv-sys", "0.2.0"),
+//    ("utf8-ranges", "0.1.3"),
+//    ("utf8-ranges", "1.0.0"),
+//    ("vcpkg", "0.2.2"),
+//    ("vec_map", "0.8.0"),
+//    ("void", "1.0.2"),
+//    ("walkdir", "1.0.7"),
+//    ("walkdir", "2.0.1"),
+//    ("winapi", "0.2.8"),
+//    ("winapi", "0.3.4"),
+//    ("winapi-build", "0.1.1"),
+//    ("winapi-i686-pc-windows-gnu", "0.4.0"),
+//    ("winapi-x86_64-pc-windows-gnu", "0.4.0"),
+//    ("wincolor", "0.1.4"),
+//    ("workspace_symbol", "0.1.0"),
+//    ("ws2_32-sys", "0.2.1"),
+//    ("xattr", "0.1.11"),
+//    ("xz2", "0.1.4"),
+//    ("yaml-rust", "0.3.5"),
+];
 
 // Some types for Serde to deserialize the output of `cargo metadata` to...
 
@@ -186,6 +494,7 @@ fn extract_license(line: &str) -> String {
 /// Get the dependencies of the crate at the given path using `cargo metadata`.
 fn get_deps(path: &Path) -> Vec<Package> {
     // Run `cargo metadata` to get the set of dependencies
+    println!("Getting metadata from {:?}", path.join("Cargo.toml"));
     let output = Command::new("cargo")
         .arg("metadata")
         .arg("--format-version")