[INFO] cloning repository https://github.com/LiamOW/RustyCalculator
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LiamOW/RustyCalculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 96e97b2ce164d98f042cbee4b5ab1c2fa9f796f0
[INFO] checking LiamOW/RustyCalculator against try#4662032ab74cd44d423120d08d251dfead4914a0 for pr-72788
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamOW/RustyCalculator on toolchain 4662032ab74cd44d423120d08d251dfead4914a0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "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 /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/LiamOW/RustyCalculator already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "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 /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rocket_cors v0.5.2
[INFO] [stderr]   Downloaded vec_map v0.0.1
[INFO] [stderr]   Downloaded calculator v0.0.1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+4662032ab74cd44d423120d08d251dfead4914a0" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a239cccd6b982e5f9e45e6c23884b3b211fc833a6ec0f595a5017412ec288bc0
[INFO] running `"docker" "start" "-a" "a239cccd6b982e5f9e45e6c23884b3b211fc833a6ec0f595a5017412ec288bc0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[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 libc v0.2.71
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling subtle v2.2.3
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling zeroize v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling base64 v0.12.1
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]     Checking unic-char-range v0.7.0
[INFO] [stderr]     Checking unic-common v0.7.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking humansize v1.1.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking vec_map v0.0.1
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking unic-char-property v0.7.0
[INFO] [stderr]     Checking unic-ucd-version v0.7.0
[INFO] [stderr]    Compiling rocket_codegen v0.4.5
[INFO] [stderr]    Compiling rocket v0.4.5
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking slug v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking calculator v0.0.1
[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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a239cccd6b982e5f9e45e6c23884b3b211fc833a6ec0f595a5017412ec288bc0"`
[INFO] running `"docker" "rm" "-f" "a239cccd6b982e5f9e45e6c23884b3b211fc833a6ec0f595a5017412ec288bc0"`
[INFO] [stdout] a239cccd6b982e5f9e45e6c23884b3b211fc833a6ec0f595a5017412ec288bc0