[INFO] crate treap 0.0.3 is already in cache
[INFO] extracting crate treap 0.0.3 into work/ex/beta-1.37-6/sources/1.36.0/reg/treap/0.0.3
[INFO] extracting crate treap 0.0.3 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/treap/0.0.3
[INFO] validating manifest of treap-0.0.3 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of treap-0.0.3 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing treap-0.0.3
[INFO] finished frobbing treap-0.0.3
[INFO] frobbed toml for treap-0.0.3 written to work/ex/beta-1.37-6/sources/1.36.0/reg/treap/0.0.3/Cargo.toml
[INFO] started frobbing treap-0.0.3
[INFO] finished frobbing treap-0.0.3
[INFO] frobbed toml for treap-0.0.3 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/treap/0.0.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing treap-0.0.3 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/treap/0.0.3:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 0227c66faccf7c37864b44dab1b8018a5bba64a09628df3b69b161c9c746a3fd
[INFO] running `"docker" "start" "-a" "0227c66faccf7c37864b44dab1b8018a5bba64a09628df3b69b161c9c746a3fd"`
[INFO] [stderr]    Compiling log v0.2.5
[INFO] [stderr] error[E0425]: cannot find function `at_exit` in module `rt`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.5/src/lib.rs:535:9
[INFO] [stderr]     |
[INFO] [stderr] 535 |     rt::at_exit(|| {
[INFO] [stderr]     |         ^^^^^^^ not found in `rt`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.5/src/lib.rs:145:1
[INFO] [stderr]     |
[INFO] [stderr] 145 | #![feature(core, std_misc)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rt': this public module should not exist and is highly likely to disappear
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.5/src/lib.rs:153:5
[INFO] [stderr]     |
[INFO] [stderr] 153 | use std::rt;
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `log`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0227c66faccf7c37864b44dab1b8018a5bba64a09628df3b69b161c9c746a3fd"`
[INFO] running `"docker" "rm" "-f" "0227c66faccf7c37864b44dab1b8018a5bba64a09628df3b69b161c9c746a3fd"`
[INFO] [stdout] 0227c66faccf7c37864b44dab1b8018a5bba64a09628df3b69b161c9c746a3fd