[INFO] updating cached repository https://github.com/killercup/limerick_ebooks
[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] 54c596866e8275d5b141ff7ac03342d7bab7d475
[INFO] checking killercup/limerick_ebooks against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkillercup%2Flimerick_ebooks" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/killercup/limerick_ebooks on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/killercup/limerick_ebooks
[INFO] finished tweaking git repo https://github.com/killercup/limerick_ebooks
[INFO] tweaked toml for git repo https://github.com/killercup/limerick_ebooks written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/killercup/limerick_ebooks already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] d5f6cd99debcec55f6a9af492dc91239d9b3d5c1f033d3c346139ebf556f1ec7
[INFO] running `"docker" "start" "-a" "d5f6cd99debcec55f6a9af492dc91239d9b3d5c1f033d3c346139ebf556f1ec7"`
[INFO] [stderr]     Checking serde v1.0.8
[INFO] [stderr]     Checking cfg-if v0.1.1
[INFO] [stderr]     Checking arena-tree v0.3.0
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]     Checking quick-error v1.2.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking structopt v0.1.0
[INFO] [stderr]    Compiling structopt-derive v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.11
[INFO] [stderr]     Checking comrak v0.1.4
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking serde_yaml v0.7.1
[INFO] [stderr]     Checking handlebars v0.27.0
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr]     Checking error-chain v0.11.0-rc.2
[INFO] [stderr]     Checking limericks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | / error_chain! {
[INFO] [stderr] 67 | |     foreign_links {
[INFO] [stderr] 68 | |         Io(::std::io::Error);
[INFO] [stderr] 69 | |         Handlebars(::handlebars::TemplateRenderError);
[INFO] [stderr] 70 | |         Yaml(::yaml::Error);
[INFO] [stderr] 71 | |     }
[INFO] [stderr] 72 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | / error_chain! {
[INFO] [stderr] 67 | |     foreign_links {
[INFO] [stderr] 68 | |         Io(::std::io::Error);
[INFO] [stderr] 69 | |         Handlebars(::handlebars::TemplateRenderError);
[INFO] [stderr] 70 | |         Yaml(::yaml::Error);
[INFO] [stderr] 71 | |     }
[INFO] [stderr] 72 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | / error_chain! {
[INFO] [stderr] 67 | |     foreign_links {
[INFO] [stderr] 68 | |         Io(::std::io::Error);
[INFO] [stderr] 69 | |         Handlebars(::handlebars::TemplateRenderError);
[INFO] [stderr] 70 | |         Yaml(::yaml::Error);
[INFO] [stderr] 71 | |     }
[INFO] [stderr] 72 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | / error_chain! {
[INFO] [stderr] 67 | |     foreign_links {
[INFO] [stderr] 68 | |         Io(::std::io::Error);
[INFO] [stderr] 69 | |         Handlebars(::handlebars::TemplateRenderError);
[INFO] [stderr] 70 | |         Yaml(::yaml::Error);
[INFO] [stderr] 71 | |     }
[INFO] [stderr] 72 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.83s
[INFO] running `"docker" "inspect" "d5f6cd99debcec55f6a9af492dc91239d9b3d5c1f033d3c346139ebf556f1ec7"`
[INFO] running `"docker" "rm" "-f" "d5f6cd99debcec55f6a9af492dc91239d9b3d5c1f033d3c346139ebf556f1ec7"`
[INFO] [stdout] d5f6cd99debcec55f6a9af492dc91239d9b3d5c1f033d3c346139ebf556f1ec7