[INFO] fetching crate prefix 1.0.4...
[INFO] checking prefix-1.0.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate prefix 1.0.4 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate prefix 1.0.4 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 crates.io crate prefix 1.0.4
[INFO] finished tweaking crates.io crate prefix 1.0.4
[INFO] tweaked toml for crates.io crate prefix 1.0.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate prefix 1.0.4 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_mangen v0.1.6
[INFO] [stderr]   Downloaded clap_complete v3.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] dbbfc7fad4222bd5b083f370aa86c2cd67a969f273878b62ba8ab8cf28c6b03b
[INFO] running `Command { std: "docker" "start" "-a" "dbbfc7fad4222bd5b083f370aa86c2cd67a969f273878b62ba8ab8cf28c6b03b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbbfc7fad4222bd5b083f370aa86c2cd67a969f273878b62ba8ab8cf28c6b03b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbbfc7fad4222bd5b083f370aa86c2cd67a969f273878b62ba8ab8cf28c6b03b", kill_on_drop: false }`
[INFO] [stdout] dbbfc7fad4222bd5b083f370aa86c2cd67a969f273878b62ba8ab8cf28c6b03b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] adcb4441b67db2d34180d4b6b55990a8304947244140cb76f8926f8debf44904
[INFO] running `Command { std: "docker" "start" "-a" "adcb4441b67db2d34180d4b6b55990a8304947244140cb76f8926f8debf44904", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling os_str_bytes v6.1.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling roff v0.2.1
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]    Compiling clap v3.1.18
[INFO] [stderr]    Compiling clap_mangen v0.1.6
[INFO] [stderr]    Compiling clap_complete v3.1.4
[INFO] [stderr]    Compiling prefix v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.bash"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.fish"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/_prefix.ps1"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/_prefix"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.1"
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.95s
[INFO] running `Command { std: "docker" "inspect" "adcb4441b67db2d34180d4b6b55990a8304947244140cb76f8926f8debf44904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adcb4441b67db2d34180d4b6b55990a8304947244140cb76f8926f8debf44904", kill_on_drop: false }`
[INFO] [stdout] adcb4441b67db2d34180d4b6b55990a8304947244140cb76f8926f8debf44904
[INFO] checking prefix-1.0.4 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate prefix 1.0.4 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate prefix 1.0.4 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 crates.io crate prefix 1.0.4
[INFO] finished tweaking crates.io crate prefix 1.0.4
[INFO] tweaked toml for crates.io crate prefix 1.0.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate prefix 1.0.4 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 38f86b665b32269df570d4526a8ad6777910c7aad3b55afbf4af46306234034c
[INFO] running `Command { std: "docker" "start" "-a" "38f86b665b32269df570d4526a8ad6777910c7aad3b55afbf4af46306234034c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38f86b665b32269df570d4526a8ad6777910c7aad3b55afbf4af46306234034c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f86b665b32269df570d4526a8ad6777910c7aad3b55afbf4af46306234034c", kill_on_drop: false }`
[INFO] [stdout] 38f86b665b32269df570d4526a8ad6777910c7aad3b55afbf4af46306234034c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 7d01098e1d87f0b2832fc13284710913b184bcf21787cda1a21e182c347ad9e6
[INFO] running `Command { std: "docker" "start" "-a" "7d01098e1d87f0b2832fc13284710913b184bcf21787cda1a21e182c347ad9e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling os_str_bytes v6.1.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling roff v0.2.1
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling clap_lex v0.2.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]    Compiling clap v3.1.18
[INFO] [stderr]    Compiling clap_complete v3.1.4
[INFO] [stderr]    Compiling clap_mangen v0.1.6
[INFO] [stderr]    Compiling prefix v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.bash"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.fish"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/_prefix.ps1"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/_prefix"
[INFO] [stderr] warning: prefix@1.0.4: completion file is generated: "/opt/rustwide/target/debug/build/prefix-ff7129b19578612b/out/prefix.1"
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.67s
[INFO] running `Command { std: "docker" "inspect" "7d01098e1d87f0b2832fc13284710913b184bcf21787cda1a21e182c347ad9e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d01098e1d87f0b2832fc13284710913b184bcf21787cda1a21e182c347ad9e6", kill_on_drop: false }`
[INFO] [stdout] 7d01098e1d87f0b2832fc13284710913b184bcf21787cda1a21e182c347ad9e6