[INFO] updating cached repository https://github.com/malbarbo/mstcc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] b48336773edbf87006d19a226845ad21156b86fe
[INFO] checking malbarbo/mstcc against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalbarbo%2Fmstcc" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/malbarbo/mstcc on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/malbarbo/mstcc
[INFO] finished tweaking git repo https://github.com/malbarbo/mstcc
[INFO] tweaked toml for git repo https://github.com/malbarbo/mstcc written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/malbarbo/mstcc already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "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] 0200f995d7b84330b158f2fd1129c82e396198efb602d171657a0df84f78703d
[INFO] running `"docker" "start" "-a" "0200f995d7b84330b158f2fd1129c82e396198efb602d171657a0df84f78703d"`
[INFO] [stderr]     Checking fera-fun v0.1.0
[INFO] [stderr]     Checking fera-unionfind v0.1.0
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking fera-optional v0.1.1
[INFO] [stderr]     Checking fera-ext v0.1.0
[INFO] [stderr]     Checking env_logger v0.5.9
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking fera-graph v0.1.1
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking fera v0.1.0
[INFO] [stderr]     Checking mstcc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/input.rs:13:68
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn read_sammer_urrutia(file: &str) -> Result<MstCcProblem, Box<Error>> {
[INFO] [stderr]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/input.rs:13:68
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn read_sammer_urrutia(file: &str) -> Result<MstCcProblem, Box<Error>> {
[INFO] [stderr]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.48s
[INFO] running `"docker" "inspect" "0200f995d7b84330b158f2fd1129c82e396198efb602d171657a0df84f78703d"`
[INFO] running `"docker" "rm" "-f" "0200f995d7b84330b158f2fd1129c82e396198efb602d171657a0df84f78703d"`
[INFO] [stdout] 0200f995d7b84330b158f2fd1129c82e396198efb602d171657a0df84f78703d