[INFO] crate rustspec_assertions 0.1.9 is already in cache
[INFO] extracting crate rustspec_assertions 0.1.9 into work/ex/beta-1.38-1/sources/1.37.0/reg/rustspec_assertions/0.1.9
[INFO] extracting crate rustspec_assertions 0.1.9 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustspec_assertions/0.1.9
[INFO] validating manifest of rustspec_assertions-0.1.9 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustspec_assertions-0.1.9 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rustspec_assertions-0.1.9
[INFO] finished frobbing rustspec_assertions-0.1.9
[INFO] frobbed toml for rustspec_assertions-0.1.9 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rustspec_assertions/0.1.9/Cargo.toml
[INFO] started frobbing rustspec_assertions-0.1.9
[INFO] finished frobbing rustspec_assertions-0.1.9
[INFO] frobbed toml for rustspec_assertions-0.1.9 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustspec_assertions/0.1.9/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rustspec_assertions-0.1.9 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rustspec_assertions/0.1.9:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 10a8a005554e5b31af021af470eed261258b016fed911b9ef7d7ac2ec1dbed57
[INFO] running `"docker" "start" "-a" "10a8a005554e5b31af021af470eed261258b016fed911b9ef7d7ac2ec1dbed57"`
[INFO] [stderr]    Compiling rustspec_assertions v0.1.9 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `begin_unwind` in module `std::rt`
[INFO] [stderr]   --> src/expect.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |         ::std::rt::begin_unwind(msg, &other.get_file_line());
[INFO] [stderr]    |                    ^^^^^^^^^^^^ not found in `std::rt`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(plugin_registrar, rustc_private, std_misc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/expect.rs:9:33
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to(&self, other: Box<Matcher<T>>) {
[INFO] [stderr]   |                                 ^^^^^^^^^^ help: use `dyn`: `dyn Matcher<T>`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/expect.rs:21:41
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn not_to(&mut self, other: Box<Matcher<T>>) {
[INFO] [stderr]    |                                         ^^^^^^^^^^ help: use `dyn`: `dyn Matcher<T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/expect.rs:26:31
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn fail(&self, other: Box<Matcher<T>>) {
[INFO] [stderr]    |                               ^^^^^^^^^^ help: use `dyn`: `dyn Matcher<T>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `rustspec_assertions`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "10a8a005554e5b31af021af470eed261258b016fed911b9ef7d7ac2ec1dbed57"`
[INFO] running `"docker" "rm" "-f" "10a8a005554e5b31af021af470eed261258b016fed911b9ef7d7ac2ec1dbed57"`
[INFO] [stdout] 10a8a005554e5b31af021af470eed261258b016fed911b9ef7d7ac2ec1dbed57