[INFO] updating cached repository disordinary/crdt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/disordinary/crdt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/disordinary/crdt" "work/ex/beta-1.38-1/sources/1.37.0/gh/disordinary/crdt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/disordinary/crdt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/disordinary/crdt" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/disordinary/crdt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/disordinary/crdt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 28f080e40327a1a37b114bc817f1b4de70c4bdc4
[INFO] sha for GitHub repo disordinary/crdt: 28f080e40327a1a37b114bc817f1b4de70c4bdc4
[INFO] validating manifest of disordinary/crdt 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 disordinary/crdt 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 disordinary/crdt
[INFO] finished frobbing disordinary/crdt
[INFO] frobbed toml for disordinary/crdt written to work/ex/beta-1.38-1/sources/1.37.0/gh/disordinary/crdt/Cargo.toml
[INFO] started frobbing disordinary/crdt
[INFO] finished frobbing disordinary/crdt
[INFO] frobbed toml for disordinary/crdt written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/disordinary/crdt/Cargo.toml
[INFO] crate disordinary/crdt 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing disordinary/crdt 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/disordinary/crdt:/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] 342580655f7657d4f22647c09040de5ac476a97f30e292b8b6927fecf1f786c8
[INFO] running `"docker" "start" "-a" "342580655f7657d4f22647c09040de5ac476a97f30e292b8b6927fecf1f786c8"`
[INFO] [stderr]    Compiling labs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(unsafe_destructor)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(libc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `c_void`, `free`, `size_t`
[INFO] [stderr]  --> src/crdt/mod.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use libc::{c_void, size_t, malloc, free};
[INFO] [stderr]   |            ^^^^^^  ^^^^^^          ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Slice`
[INFO] [stderr]  --> src/text.rs:2:18
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crdt::{List, Slice};
[INFO] [stderr]   |                  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/crdt/mod.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/crdt/mod.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 | use libc::{c_void, size_t, malloc, free};
[INFO] [stderr]   |                    ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/crdt/mod.rs:2:28
[INFO] [stderr]   |
[INFO] [stderr] 2 | use libc::{c_void, size_t, malloc, free};
[INFO] [stderr]   |                            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/crdt/mod.rs:2:36
[INFO] [stderr]   |
[INFO] [stderr] 2 | use libc::{c_void, size_t, malloc, free};
[INFO] [stderr]   |                                    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/crdt/mod.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |             let mut head = malloc(mem::size_of::<Node<T>>()) as *mut Node<T>;
[INFO] [stderr]    |                            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/crdt/mod.rs:38:24
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let node = malloc(mem::size_of::<Node<T>>()) as *mut Node<T>;
[INFO] [stderr]    |                        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 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 `labs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "342580655f7657d4f22647c09040de5ac476a97f30e292b8b6927fecf1f786c8"`
[INFO] running `"docker" "rm" "-f" "342580655f7657d4f22647c09040de5ac476a97f30e292b8b6927fecf1f786c8"`
[INFO] [stdout] 342580655f7657d4f22647c09040de5ac476a97f30e292b8b6927fecf1f786c8