[INFO] cloning repository https://github.com/paga2004/chers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paga2004/chers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaga2004%2Fchers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaga2004%2Fchers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e18b5673b0e21b2a72b9331213f8c4753a578a37
[INFO] checking paga2004/chers against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaga2004%2Fchers" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paga2004/chers on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paga2004/chers
[INFO] finished tweaking git repo https://github.com/paga2004/chers
[INFO] tweaked toml for git repo https://github.com/paga2004/chers written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/paga2004/chers 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-case v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dc7a8d9ae708bf8365fd6cdf60527afefd890ea43cb8d8d0df0650a254520d8
[INFO] running `Command { std: "docker" "start" "-a" "8dc7a8d9ae708bf8365fd6cdf60527afefd890ea43cb8d8d0df0650a254520d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dc7a8d9ae708bf8365fd6cdf60527afefd890ea43cb8d8d0df0650a254520d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dc7a8d9ae708bf8365fd6cdf60527afefd890ea43cb8d8d0df0650a254520d8", kill_on_drop: false }`
[INFO] [stdout] 8dc7a8d9ae708bf8365fd6cdf60527afefd890ea43cb8d8d0df0650a254520d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c3ff590dc086d356545db01908acdc535195af28bb94bb511d2e4902e6a9d96
[INFO] running `Command { std: "docker" "start" "-a" "8c3ff590dc086d356545db01908acdc535195af28bb94bb511d2e4902e6a9d96", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cast v0.2.5
[INFO] [stderr]    Compiling zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]    Compiling test-case v1.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking arrayvec v0.7.1
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking iai v0.1.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking chers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 45.06s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "8c3ff590dc086d356545db01908acdc535195af28bb94bb511d2e4902e6a9d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c3ff590dc086d356545db01908acdc535195af28bb94bb511d2e4902e6a9d96", kill_on_drop: false }`
[INFO] [stdout] 8c3ff590dc086d356545db01908acdc535195af28bb94bb511d2e4902e6a9d96
[INFO] checking paga2004/chers against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaga2004%2Fchers" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paga2004/chers on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paga2004/chers
[INFO] finished tweaking git repo https://github.com/paga2004/chers
[INFO] tweaked toml for git repo https://github.com/paga2004/chers written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/paga2004/chers 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d59ef34efc384b7e20f10b4fa0f3e52f9c41cadff64faf04bbe264a8a6ad618
[INFO] running `Command { std: "docker" "start" "-a" "8d59ef34efc384b7e20f10b4fa0f3e52f9c41cadff64faf04bbe264a8a6ad618", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d59ef34efc384b7e20f10b4fa0f3e52f9c41cadff64faf04bbe264a8a6ad618", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d59ef34efc384b7e20f10b4fa0f3e52f9c41cadff64faf04bbe264a8a6ad618", kill_on_drop: false }`
[INFO] [stdout] 8d59ef34efc384b7e20f10b4fa0f3e52f9c41cadff64faf04bbe264a8a6ad618
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fe5a62226852d347a420aacc3945119b8b6643bd664d5205087fc1721efd495
[INFO] running `Command { std: "docker" "start" "-a" "5fe5a62226852d347a420aacc3945119b8b6643bd664d5205087fc1721efd495", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cast v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling test-case v1.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking arrayvec v0.7.1
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking iai v0.1.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking chers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 49.76s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "5fe5a62226852d347a420aacc3945119b8b6643bd664d5205087fc1721efd495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe5a62226852d347a420aacc3945119b8b6643bd664d5205087fc1721efd495", kill_on_drop: false }`
[INFO] [stdout] 5fe5a62226852d347a420aacc3945119b8b6643bd664d5205087fc1721efd495