[INFO] updating cached repository seansfkelley/terrain-generator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/seansfkelley/terrain-generator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/seansfkelley/terrain-generator" "work/ex/beta-1.38-1/sources/1.37.0/gh/seansfkelley/terrain-generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/seansfkelley/terrain-generator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/seansfkelley/terrain-generator" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/seansfkelley/terrain-generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/seansfkelley/terrain-generator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] af734a187617c3b69b381788bf0b91fafd91d3fd
[INFO] sha for GitHub repo seansfkelley/terrain-generator: af734a187617c3b69b381788bf0b91fafd91d3fd
[INFO] validating manifest of seansfkelley/terrain-generator 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 seansfkelley/terrain-generator 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 seansfkelley/terrain-generator
[INFO] finished frobbing seansfkelley/terrain-generator
[INFO] frobbed toml for seansfkelley/terrain-generator written to work/ex/beta-1.38-1/sources/1.37.0/gh/seansfkelley/terrain-generator/Cargo.toml
[INFO] started frobbing seansfkelley/terrain-generator
[INFO] finished frobbing seansfkelley/terrain-generator
[INFO] frobbed toml for seansfkelley/terrain-generator written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/seansfkelley/terrain-generator/Cargo.toml
[INFO] crate seansfkelley/terrain-generator 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 seansfkelley/terrain-generator 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/seansfkelley/terrain-generator:/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] 7bad735c9ff142fe041e25126b6910aaad797be1f8939491fc4c42bf129fe1cc
[INFO] running `"docker" "start" "-a" "7bad735c9ff142fe041e25126b6910aaad797be1f8939491fc4c42bf129fe1cc"`
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling cmake v0.1.26
[INFO] [stderr]    Compiling xml-rs v0.6.2
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]    Compiling num-bigint v0.1.40
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling glfw-sys v3.2.2
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling gl_generator v0.5.5
[INFO] [stderr]    Compiling num-rational v0.1.39
[INFO] [stderr]    Compiling num v0.1.40
[INFO] [stderr]    Compiling image v0.17.0
[INFO] [stderr]    Compiling gl v0.6.3
[INFO] [stderr]    Compiling glfw v0.18.0 (https://github.com/bjz/glfw-rs.git#3bc2f8b2)
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr]    Compiling glm v0.2.3
[INFO] [stderr]    Compiling terrain-generator 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(libc)]
[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:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | 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: aborting due to 2 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 `terrain-generator`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7bad735c9ff142fe041e25126b6910aaad797be1f8939491fc4c42bf129fe1cc"`
[INFO] running `"docker" "rm" "-f" "7bad735c9ff142fe041e25126b6910aaad797be1f8939491fc4c42bf129fe1cc"`
[INFO] [stdout] 7bad735c9ff142fe041e25126b6910aaad797be1f8939491fc4c42bf129fe1cc