[INFO] updating cached repository frontsideair/mst
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/frontsideair/mst
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/frontsideair/mst" "work/ex/beta-1.38-1/sources/1.37.0/gh/frontsideair/mst"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/frontsideair/mst'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/frontsideair/mst" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/frontsideair/mst"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/frontsideair/mst'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 733dbaf513c19019b8723224c49c379ae0eac176
[INFO] sha for GitHub repo frontsideair/mst: 733dbaf513c19019b8723224c49c379ae0eac176
[INFO] validating manifest of frontsideair/mst 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 frontsideair/mst 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 frontsideair/mst
[INFO] finished frobbing frontsideair/mst
[INFO] frobbed toml for frontsideair/mst written to work/ex/beta-1.38-1/sources/1.37.0/gh/frontsideair/mst/Cargo.toml
[INFO] started frobbing frontsideair/mst
[INFO] finished frobbing frontsideair/mst
[INFO] frobbed toml for frontsideair/mst written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/frontsideair/mst/Cargo.toml
[INFO] crate frontsideair/mst already has a lockfile, it will not be regenerated
[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 frontsideair/mst 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/frontsideair/mst:/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] c1414e7950ac7f9d781055bf6d2d7dd7cce4d60521a20f317581b6ab5324ba52
[INFO] running `"docker" "start" "-a" "c1414e7950ac7f9d781055bf6d2d7dd7cce4d60521a20f317581b6ab5324ba52"`
[INFO] [stderr]    Compiling mintree1 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `"docker" "inspect" "c1414e7950ac7f9d781055bf6d2d7dd7cce4d60521a20f317581b6ab5324ba52"`
[INFO] running `"docker" "rm" "-f" "c1414e7950ac7f9d781055bf6d2d7dd7cce4d60521a20f317581b6ab5324ba52"`
[INFO] [stdout] c1414e7950ac7f9d781055bf6d2d7dd7cce4d60521a20f317581b6ab5324ba52
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/frontsideair/mst:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] e83603d21ce8594f610546187e741375dec599101345b4bf4705a190887d2dd1
[INFO] running `"docker" "start" "-a" "e83603d21ce8594f610546187e741375dec599101345b4bf4705a190887d2dd1"`
[INFO] [stderr]    Compiling cast v0.1.0
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling floaty v0.1.0
[INFO] [stderr]    Compiling criterion-stats v0.1.1 (https://github.com/japaric/criterion.rs.git#eaa682f7)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(custom_attribute)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![feature(fn_traits)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![feature(plugin)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(unboxed_closures)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/lib.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | #![feature(unique)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/bivariate/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/bivariate/mod.rs:94:35
[INFO] [stderr]    |
[INFO] [stderr] 94 |                     let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/sample.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/sample.rs:242:35
[INFO] [stderr]     |
[INFO] [stderr] 242 |                     let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/mixed.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/mixed.rs:47:31
[INFO] [stderr]    |
[INFO] [stderr] 47 |                 let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/bivariate/mod.rs:94:35
[INFO] [stderr]    |
[INFO] [stderr] 94 |                     let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/bivariate/mod.rs:99:72
[INFO] [stderr]    |
[INFO] [stderr] 99 |                         let distributions: &mut T::Distributions = ptr.as_mut();
[INFO] [stderr]    |                                                                        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling criterion-plot v0.1.1 (https://github.com/japaric/criterion.rs.git#eaa682f7)
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/sample.rs:242:35
[INFO] [stderr]     |
[INFO] [stderr] 242 |                     let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/sample.rs:247:72
[INFO] [stderr]     |
[INFO] [stderr] 247 |                         let distributions: &mut T::Distributions = ptr.as_mut();
[INFO] [stderr]     |                                                                        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/mixed.rs:47:31
[INFO] [stderr]    |
[INFO] [stderr] 47 |                 let mut ptr = Unique::new_unchecked(&mut distributions);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/criterion.rs-33720cacd219973f/eaa682f/stats/src/univariate/mixed.rs:51:68
[INFO] [stderr]    |
[INFO] [stderr] 51 |                     let distributions: &mut T::Distributions = ptr.as_mut();
[INFO] [stderr]    |                                                                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 17 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `criterion-stats`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e83603d21ce8594f610546187e741375dec599101345b4bf4705a190887d2dd1"`
[INFO] running `"docker" "rm" "-f" "e83603d21ce8594f610546187e741375dec599101345b4bf4705a190887d2dd1"`
[INFO] [stdout] e83603d21ce8594f610546187e741375dec599101345b4bf4705a190887d2dd1