[INFO] fetching crate chaotest 0.0.3...
[INFO] checking chaotest-0.0.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate chaotest 0.0.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate chaotest 0.0.3 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 chaotest 0.0.3
[INFO] finished tweaking crates.io crate chaotest 0.0.3
[INFO] tweaked toml for crates.io crate chaotest 0.0.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate chaotest 0.0.3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded alloc-stdlib v0.2.1
[INFO] [stderr]   Downloaded once_cell v1.13.1
[INFO] [stderr]   Downloaded ureq v2.5.0
[INFO] [stderr]   Downloaded anyhow v1.0.63
[INFO] [stderr]   Downloaded alloc-no-stdlib v2.0.3
[INFO] [stderr]   Downloaded brotli-decompressor v2.3.2
[INFO] [stderr]   Downloaded webpki-roots v0.22.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 54bf1bc09b31c7e5808b92eeb400d83fb6c9ffaf4b931267eb2d016f6289455d
[INFO] running `Command { std: "docker" "start" "-a" "54bf1bc09b31c7e5808b92eeb400d83fb6c9ffaf4b931267eb2d016f6289455d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54bf1bc09b31c7e5808b92eeb400d83fb6c9ffaf4b931267eb2d016f6289455d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54bf1bc09b31c7e5808b92eeb400d83fb6c9ffaf4b931267eb2d016f6289455d", kill_on_drop: false }`
[INFO] [stdout] 54bf1bc09b31c7e5808b92eeb400d83fb6c9ffaf4b931267eb2d016f6289455d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1713bb5ce6f731319a3a237f6003ca6bee6f3a03b5ab355c3a5058c9ded46ec4
[INFO] running `Command { std: "docker" "start" "-a" "1713bb5ce6f731319a3a237f6003ca6bee6f3a03b5ab355c3a5058c9ded46ec4", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.3
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]    Compiling anyhow v1.0.63
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]     Checking alloc-stdlib v0.2.1
[INFO] [stderr]     Checking brotli-decompressor v2.3.2
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking serde_json v1.0.85
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.22.4
[INFO] [stderr]     Checking ureq v2.5.0
[INFO] [stderr]     Checking chaotest v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.93s
[INFO] running `Command { std: "docker" "inspect" "1713bb5ce6f731319a3a237f6003ca6bee6f3a03b5ab355c3a5058c9ded46ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1713bb5ce6f731319a3a237f6003ca6bee6f3a03b5ab355c3a5058c9ded46ec4", kill_on_drop: false }`
[INFO] [stdout] 1713bb5ce6f731319a3a237f6003ca6bee6f3a03b5ab355c3a5058c9ded46ec4
[INFO] checking chaotest-0.0.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate chaotest 0.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate chaotest 0.0.3 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 chaotest 0.0.3
[INFO] finished tweaking crates.io crate chaotest 0.0.3
[INFO] tweaked toml for crates.io crate chaotest 0.0.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate chaotest 0.0.3 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f680514a43ff317cd47df74cae732534012ccfbb10768341cab5d064ed8ee897
[INFO] running `Command { std: "docker" "start" "-a" "f680514a43ff317cd47df74cae732534012ccfbb10768341cab5d064ed8ee897", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f680514a43ff317cd47df74cae732534012ccfbb10768341cab5d064ed8ee897", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f680514a43ff317cd47df74cae732534012ccfbb10768341cab5d064ed8ee897", kill_on_drop: false }`
[INFO] [stdout] f680514a43ff317cd47df74cae732534012ccfbb10768341cab5d064ed8ee897
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 93af98fa48a68035cc48d3dbee7ce8583f757cdab322c499cc2b9f600c5927d7
[INFO] running `Command { std: "docker" "start" "-a" "93af98fa48a68035cc48d3dbee7ce8583f757cdab322c499cc2b9f600c5927d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.3
[INFO] [stderr]    Compiling anyhow v1.0.63
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]     Checking alloc-stdlib v0.2.1
[INFO] [stderr]     Checking brotli-decompressor v2.3.2
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking serde_json v1.0.85
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.22.4
[INFO] [stderr]     Checking ureq v2.5.0
[INFO] [stderr]     Checking chaotest v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.43s
[INFO] running `Command { std: "docker" "inspect" "93af98fa48a68035cc48d3dbee7ce8583f757cdab322c499cc2b9f600c5927d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93af98fa48a68035cc48d3dbee7ce8583f757cdab322c499cc2b9f600c5927d7", kill_on_drop: false }`
[INFO] [stdout] 93af98fa48a68035cc48d3dbee7ce8583f757cdab322c499cc2b9f600c5927d7