[INFO] cloning repository https://github.com/genya0407/questions
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/genya0407/questions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgenya0407%2Fquestions"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgenya0407%2Fquestions'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0df549b5582ec1cb9a66452c5bc0be89192bbf32
[INFO] checking genya0407/questions against try#e922e6444795ab795fab1943288aee3d543699b8 for pr-66852
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgenya0407%2Fquestions" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/genya0407/questions on toolchain e922e6444795ab795fab1943288aee3d543699b8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/genya0407/questions
[INFO] finished tweaking git repo https://github.com/genya0407/questions
[INFO] tweaked toml for git repo https://github.com/genya0407/questions written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/genya0407/questions already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+e922e6444795ab795fab1943288aee3d543699b8" "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] b64d063b3e30e97f7eff446ed6639f7fecd3eb51e5d58048c06cc2362b21e5a7
[INFO] running `"docker" "start" "-a" "b64d063b3e30e97f7eff446ed6639f7fecd3eb51e5d58048c06cc2362b21e5a7"`
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling futures v0.1.14
[INFO] [stderr]    Compiling typenum v1.5.2
[INFO] [stderr]    Compiling yansi v0.3.0
[INFO] [stderr]     Checking constant_time_eq v0.1.2
[INFO] [stderr]    Compiling untrusted v0.5.0
[INFO] [stderr]     Checking md5 v0.3.5
[INFO] [stderr]    Compiling pear_codegen v0.0.10
[INFO] [stderr]    Compiling serde v1.0.10
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.10/src/lib.rs:1:45
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, rustc_private, quote)]
[INFO] [stderr]   |                                             ^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr]     Checking pest v0.4.1
[INFO] [stderr]     Checking smallvec v0.4.1
[INFO] [stderr] error[E0463]: can't find crate for `rustc`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.10/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate rustc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0463, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `pear_codegen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b64d063b3e30e97f7eff446ed6639f7fecd3eb51e5d58048c06cc2362b21e5a7"`
[INFO] running `"docker" "rm" "-f" "b64d063b3e30e97f7eff446ed6639f7fecd3eb51e5d58048c06cc2362b21e5a7"`
[INFO] [stdout] b64d063b3e30e97f7eff446ed6639f7fecd3eb51e5d58048c06cc2362b21e5a7