[INFO] crate cson 0.1.16 is already in cache
[INFO] extracting crate cson 0.1.16 into work/ex/beta-1.38-1/sources/1.37.0/reg/cson/0.1.16
[INFO] extracting crate cson 0.1.16 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cson/0.1.16
[INFO] validating manifest of cson-0.1.16 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 cson-0.1.16 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 cson-0.1.16
[INFO] finished frobbing cson-0.1.16
[INFO] frobbed toml for cson-0.1.16 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cson/0.1.16/Cargo.toml
[INFO] started frobbing cson-0.1.16
[INFO] finished frobbing cson-0.1.16
[INFO] frobbed toml for cson-0.1.16 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cson/0.1.16/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] [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 cson-0.1.16 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cson/0.1.16:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 9abffec84312b78caef28c85f234de9b02485fdc03add1665c8e4a6b8beb89d8
[INFO] running `"docker" "start" "-a" "9abffec84312b78caef28c85f234de9b02485fdc03add1665c8e4a6b8beb89d8"`
[INFO] [stderr]    Compiling rustc-serialize v0.2.15
[INFO] [stderr] error: invalid suffix `us` for integer literal
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/json.rs:3819:42
[INFO] [stderr]      |
[INFO] [stderr] 3819 |         tree_map.insert("a".to_string(), 1us);
[INFO] [stderr]      |                                          ^^^ invalid suffix `us`
[INFO] [stderr]      |
[INFO] [stderr]      = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `us` for integer literal
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/json.rs:3823:42
[INFO] [stderr]      |
[INFO] [stderr] 3823 |         hash_map.insert("a".to_string(), 1us);
[INFO] [stderr]      |                                          ^^^ invalid suffix `us`
[INFO] [stderr]      |
[INFO] [stderr]      = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `unicode`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/lib.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | extern crate unicode;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `rustc-serialize`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9abffec84312b78caef28c85f234de9b02485fdc03add1665c8e4a6b8beb89d8"`
[INFO] running `"docker" "rm" "-f" "9abffec84312b78caef28c85f234de9b02485fdc03add1665c8e4a6b8beb89d8"`
[INFO] [stdout] 9abffec84312b78caef28c85f234de9b02485fdc03add1665c8e4a6b8beb89d8