Rustup to rustc 1.42.0-nightly (689fca01c 2020-01-17)

patches/0017-Fix-libtest-compilation.patch

@@ -39,8 +39,8 @@ index 8b76080..9e65de2 100644
              let cfg = thread::Builder::new().name(name.as_slice().to_owned());
              cfg.spawn(runtest).unwrap();
 @@ -1531,17 +1531,8 @@ pub fn run_test(
-                 (benchfn.clone())(harness)
-             });
+             // Benchmarks aren't expected to panic, so we run them all in-process.
+             crate::bench::benchmark(desc, monitor_ch, opts.nocapture, benchfn);
          }
 -        DynTestFn(f) => {
 -            match strategy {

rust-toolchain

@@ -1 +1 @@
-nightly-2020-01-14
+nightly-2020-01-18