[INFO] crate lalrpop-lambda 0.6.1 is already in cache
[INFO] extracting crate lalrpop-lambda 0.6.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/lalrpop-lambda/0.6.1
[INFO] extracting crate lalrpop-lambda 0.6.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lalrpop-lambda/0.6.1
[INFO] validating manifest of lalrpop-lambda-0.6.1 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 lalrpop-lambda-0.6.1 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 lalrpop-lambda-0.6.1
[INFO] finished frobbing lalrpop-lambda-0.6.1
[INFO] frobbed toml for lalrpop-lambda-0.6.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/lalrpop-lambda/0.6.1/Cargo.toml
[INFO] started frobbing lalrpop-lambda-0.6.1
[INFO] finished frobbing lalrpop-lambda-0.6.1
[INFO] frobbed toml for lalrpop-lambda-0.6.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lalrpop-lambda/0.6.1/Cargo.toml
[INFO] crate lalrpop-lambda-0.6.1 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 lalrpop-lambda-0.6.1 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/reg/lalrpop-lambda/0.6.1:/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] f5a59447f1922e0090ba9e2eec22bdb218ea7184a2dbb332d51b698fc495e3b7
[INFO] running `"docker" "start" "-a" "f5a59447f1922e0090ba9e2eec22bdb218ea7184a2dbb332d51b698fc495e3b7"`
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.45
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling bumpalo v2.4.3
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling lalrpop-util v0.17.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.45
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.45
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.45
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.45
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.0
[INFO] [stderr]    Compiling lalrpop-lambda v0.6.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | / #![feature(non_ascii_idents,
[INFO] [stderr] 43 | |            box_syntax,
[INFO] [stderr] 44 | |            box_patterns,
[INFO] [stderr] 45 | |            fn_traits,
[INFO] [stderr] 46 | |            unboxed_closures)]
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `lalrpop-lambda`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f5a59447f1922e0090ba9e2eec22bdb218ea7184a2dbb332d51b698fc495e3b7"`
[INFO] running `"docker" "rm" "-f" "f5a59447f1922e0090ba9e2eec22bdb218ea7184a2dbb332d51b698fc495e3b7"`
[INFO] [stdout] f5a59447f1922e0090ba9e2eec22bdb218ea7184a2dbb332d51b698fc495e3b7