[INFO] fetching crate preserves-schema 6.0.0-rc.6...
[INFO] checking preserves-schema-6.0.0-rc.6 against master#7c41ee66db9d08e3989858acaefa1c72a6a88518 for mutual-coercion
[INFO] extracting crate preserves-schema 6.0.0-rc.6 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate preserves-schema 6.0.0-rc.6
[INFO] finished tweaking crates.io crate preserves-schema 6.0.0-rc.6
[INFO] tweaked toml for crates.io crate preserves-schema 6.0.0-rc.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate preserves-schema 6.0.0-rc.6 on toolchain 7c41ee66db9d08e3989858acaefa1c72a6a88518
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c41ee66db9d08e3989858acaefa1c72a6a88518" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate preserves-schema 6.0.0-rc.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c41ee66db9d08e3989858acaefa1c72a6a88518" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded heck v0.3.3
[INFO] [stderr]   Downloaded structopt v0.3.26
[INFO] [stderr]   Downloaded dtoa v0.4.8
[INFO] [stderr]   Downloaded structopt-derive v0.4.18
[INFO] [stderr]   Downloaded num-bigint v0.4.4
[INFO] [stderr]   Downloaded preserves v5.0.0-rc.7
[INFO] [stderr]   Downloaded proc-macro2 v1.0.79
[INFO] [stderr]   Downloaded autocfg v1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+7c41ee66db9d08e3989858acaefa1c72a6a88518" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8621d1faf4061052102f69dfb1d9a4d428eabc0589b197425d04d890d0339f45
[INFO] running `Command { std: "docker" "start" "-a" "8621d1faf4061052102f69dfb1d9a4d428eabc0589b197425d04d890d0339f45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8621d1faf4061052102f69dfb1d9a4d428eabc0589b197425d04d890d0339f45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8621d1faf4061052102f69dfb1d9a4d428eabc0589b197425d04d890d0339f45", kill_on_drop: false }`
[INFO] [stdout] 8621d1faf4061052102f69dfb1d9a4d428eabc0589b197425d04d890d0339f45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+7c41ee66db9d08e3989858acaefa1c72a6a88518" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80eb699083594a4c7b62a263470b2ac4922b43d1bd78429eebf25dc128de4efd
[INFO] running `Command { std: "docker" "start" "-a" "80eb699083594a4c7b62a263470b2ac4922b43d1bd78429eebf25dc128de4efd", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking bytemuck v1.16.0
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking convert_case v0.4.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking preserves v5.0.0-rc.7
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking preserves-schema v6.0.0-rc.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.12s
[INFO] running `Command { std: "docker" "inspect" "80eb699083594a4c7b62a263470b2ac4922b43d1bd78429eebf25dc128de4efd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80eb699083594a4c7b62a263470b2ac4922b43d1bd78429eebf25dc128de4efd", kill_on_drop: false }`
[INFO] [stdout] 80eb699083594a4c7b62a263470b2ac4922b43d1bd78429eebf25dc128de4efd