[INFO] updating cached repository https://github.com/LiamOW/RustyCalculator
[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] 96e97b2ce164d98f042cbee4b5ab1c2fa9f796f0
[INFO] checking LiamOW/RustyCalculator against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamOW/RustyCalculator 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/LiamOW/RustyCalculator
[INFO] removed path dependency calculator from git repo https://github.com/LiamOW/RustyCalculator
[INFO] finished tweaking git repo https://github.com/LiamOW/RustyCalculator
[INFO] tweaked toml for git repo https://github.com/LiamOW/RustyCalculator written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/LiamOW/RustyCalculator 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] warning: dependency (calculator) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/builds/worker-6/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[INFO] the lockfile is outdated, regenerating it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] [stderr] warning: dependency (calculator) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/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] 914c813f6eb75fb3591e0b1c8649f3da7e36b4c172bc691b25f7ffeb3a07afc9
[INFO] running `"docker" "start" "-a" "914c813f6eb75fb3591e0b1c8649f3da7e36b4c172bc691b25f7ffeb3a07afc9"`
[INFO] [stderr] warning: dependency (calculator) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling safemem v0.3.2
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]     Checking unic-char-range v0.7.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]     Checking unic-common v0.7.0
[INFO] [stderr]    Compiling indexmap v1.2.0
[INFO] [stderr]     Checking vec_map v0.0.1
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]    Compiling pest v2.1.2
[INFO] [stderr]     Checking unic-char-property v0.7.0
[INFO] [stderr]     Checking unic-ucd-version v0.7.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]     Checking calculator v0.0.1
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking unic-ucd-segment v0.7.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr] error[E0635]: unknown feature `collections`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/calculator-0.0.1/src/expr.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(collections)]
[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 E0635`.
[INFO] [stderr] error: Could not compile `calculator`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "914c813f6eb75fb3591e0b1c8649f3da7e36b4c172bc691b25f7ffeb3a07afc9"`
[INFO] running `"docker" "rm" "-f" "914c813f6eb75fb3591e0b1c8649f3da7e36b4c172bc691b25f7ffeb3a07afc9"`
[INFO] [stdout] 914c813f6eb75fb3591e0b1c8649f3da7e36b4c172bc691b25f7ffeb3a07afc9