[INFO] updating cached repository StyMaar/dupdirfinder
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/StyMaar/dupdirfinder
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/StyMaar/dupdirfinder" "work/ex/beta-1.38-1/sources/1.37.0/gh/StyMaar/dupdirfinder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/StyMaar/dupdirfinder'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/StyMaar/dupdirfinder" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/StyMaar/dupdirfinder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/StyMaar/dupdirfinder'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 178c31d8cfcfd542c42cd6eef677f00bbf047332
[INFO] sha for GitHub repo StyMaar/dupdirfinder: 178c31d8cfcfd542c42cd6eef677f00bbf047332
[INFO] validating manifest of StyMaar/dupdirfinder 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 StyMaar/dupdirfinder 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 StyMaar/dupdirfinder
[INFO] finished frobbing StyMaar/dupdirfinder
[INFO] frobbed toml for StyMaar/dupdirfinder written to work/ex/beta-1.38-1/sources/1.37.0/gh/StyMaar/dupdirfinder/Cargo.toml
[INFO] started frobbing StyMaar/dupdirfinder
[INFO] finished frobbing StyMaar/dupdirfinder
[INFO] frobbed toml for StyMaar/dupdirfinder written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/StyMaar/dupdirfinder/Cargo.toml
[INFO] crate StyMaar/dupdirfinder 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]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/StyMaar/dupdirfinder/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing StyMaar/dupdirfinder 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/StyMaar/dupdirfinder:/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] 897c1832766c6ff7d226097f0f7e6b3ca6e4406a87d89351c63385ee4ee775f0
[INFO] running `"docker" "start" "-a" "897c1832766c6ff7d226097f0f7e6b3ca6e4406a87d89351c63385ee4ee775f0"`
[INFO] [stderr]    Compiling constant_time_eq v0.1.4
[INFO] [stderr]    Compiling byte-tools v0.1.3
[INFO] [stderr]    Compiling unbytify v0.1.1
[INFO] [stderr]    Compiling generic-array v0.7.3
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]    Compiling crypto-mac v0.3.0
[INFO] [stderr]    Compiling digest v0.5.2
[INFO] [stderr]    Compiling blake2 v0.5.2
[INFO] [stderr]    Compiling structopt v0.1.7
[INFO] [stderr]    Compiling dupdirfinder 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(attr_literals)]
[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 `dupdirfinder`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "897c1832766c6ff7d226097f0f7e6b3ca6e4406a87d89351c63385ee4ee775f0"`
[INFO] running `"docker" "rm" "-f" "897c1832766c6ff7d226097f0f7e6b3ca6e4406a87d89351c63385ee4ee775f0"`
[INFO] [stdout] 897c1832766c6ff7d226097f0f7e6b3ca6e4406a87d89351c63385ee4ee775f0