[INFO] updating cached repository https://github.com/SvoONs/rustlings_solutions
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 35b055575976d21505f148b305dc29c6af2db288
[INFO] checking SvoONs/rustlings_solutions against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FSvoONs%2Frustlings_solutions" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SvoONs/rustlings_solutions on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/SvoONs/rustlings_solutions
[INFO] finished tweaking git repo https://github.com/SvoONs/rustlings_solutions
[INFO] tweaked toml for git repo https://github.com/SvoONs/rustlings_solutions written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/SvoONs/rustlings_solutions already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/builds/worker-5/source/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[INFO] the lockfile is outdated, regenerating it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/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1aaf485e4293c8520d0938f389799ff53f26dbeaae27e91b8291be6beccf85cc
[INFO] running `"docker" "start" "-a" "1aaf485e4293c8520d0938f389799ff53f26dbeaae27e91b8291be6beccf85cc"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking ucd-util v0.1.5
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking filetime v0.2.7
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking notify v4.0.13
[INFO] [stderr]     Checking console v0.9.0
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v1.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 32s
[INFO] running `"docker" "inspect" "1aaf485e4293c8520d0938f389799ff53f26dbeaae27e91b8291be6beccf85cc"`
[INFO] running `"docker" "rm" "-f" "1aaf485e4293c8520d0938f389799ff53f26dbeaae27e91b8291be6beccf85cc"`
[INFO] [stdout] 1aaf485e4293c8520d0938f389799ff53f26dbeaae27e91b8291be6beccf85cc