[INFO] fetching crate robot36-encoder 0.2.1...
[INFO] checking robot36-encoder-0.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate robot36-encoder 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate robot36-encoder 0.2.1 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 robot36-encoder 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate robot36-encoder 0.2.1
[INFO] tweaked toml for crates.io crate robot36-encoder 0.2.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate robot36-encoder 0.2.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 98eecfda7a4dddc274e5ae07a85713a6222887a620b7d2d2fc652a05a28b29ed
[INFO] running `Command { std: "docker" "start" "-a" "98eecfda7a4dddc274e5ae07a85713a6222887a620b7d2d2fc652a05a28b29ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98eecfda7a4dddc274e5ae07a85713a6222887a620b7d2d2fc652a05a28b29ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98eecfda7a4dddc274e5ae07a85713a6222887a620b7d2d2fc652a05a28b29ed", kill_on_drop: false }`
[INFO] [stdout] 98eecfda7a4dddc274e5ae07a85713a6222887a620b7d2d2fc652a05a28b29ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4364c4ae3e534cd27c744974864ffe7cfec1199b65012610b94c6b2e4a2eac8e
[INFO] running `Command { std: "docker" "start" "-a" "4364c4ae3e534cd27c744974864ffe7cfec1199b65012610b94c6b2e4a2eac8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking weezl v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking gif v0.11.4
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bytemuck v1.11.0
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking png v0.17.5
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking jpeg-decoder v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking tiff v0.7.3
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking pin-project v1.0.11
[INFO] [stderr]     Checking robot36-encoder v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.4.2
[INFO] [stderr]     Checking image v0.24.3
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.84s
[INFO] running `Command { std: "docker" "inspect" "4364c4ae3e534cd27c744974864ffe7cfec1199b65012610b94c6b2e4a2eac8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4364c4ae3e534cd27c744974864ffe7cfec1199b65012610b94c6b2e4a2eac8e", kill_on_drop: false }`
[INFO] [stdout] 4364c4ae3e534cd27c744974864ffe7cfec1199b65012610b94c6b2e4a2eac8e
[INFO] checking robot36-encoder-0.2.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate robot36-encoder 0.2.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate robot36-encoder 0.2.1 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 robot36-encoder 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate robot36-encoder 0.2.1
[INFO] tweaked toml for crates.io crate robot36-encoder 0.2.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate robot36-encoder 0.2.1 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 77627c3d6d5d249536b772dbd1d5ba67c7296e2518aaf4ed6c0a8bb769a1b214
[INFO] running `Command { std: "docker" "start" "-a" "77627c3d6d5d249536b772dbd1d5ba67c7296e2518aaf4ed6c0a8bb769a1b214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77627c3d6d5d249536b772dbd1d5ba67c7296e2518aaf4ed6c0a8bb769a1b214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77627c3d6d5d249536b772dbd1d5ba67c7296e2518aaf4ed6c0a8bb769a1b214", kill_on_drop: false }`
[INFO] [stdout] 77627c3d6d5d249536b772dbd1d5ba67c7296e2518aaf4ed6c0a8bb769a1b214
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0eb93cf62750dc6269d9f9ecfd8bca019733eba6c3017dc81a8c687399ebeea0
[INFO] running `Command { std: "docker" "start" "-a" "0eb93cf62750dc6269d9f9ecfd8bca019733eba6c3017dc81a8c687399ebeea0", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking weezl v0.1.7
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]     Checking bytemuck v1.11.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking gif v0.11.4
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking png v0.17.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking jpeg-decoder v0.2.6
[INFO] [stderr]     Checking tiff v0.7.3
[INFO] [stderr]    Compiling pin-project-internal v1.0.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking robot36-encoder v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pin-project v1.0.11
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.4.2
[INFO] [stderr]     Checking image v0.24.3
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.58s
[INFO] running `Command { std: "docker" "inspect" "0eb93cf62750dc6269d9f9ecfd8bca019733eba6c3017dc81a8c687399ebeea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb93cf62750dc6269d9f9ecfd8bca019733eba6c3017dc81a8c687399ebeea0", kill_on_drop: false }`
[INFO] [stdout] 0eb93cf62750dc6269d9f9ecfd8bca019733eba6c3017dc81a8c687399ebeea0