[INFO] fetching crate bao_bin 0.12.1...
[INFO] checking bao_bin-0.12.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate bao_bin 0.12.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate bao_bin 0.12.1 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 bao_bin 0.12.1
[INFO] finished tweaking crates.io crate bao_bin 0.12.1
[INFO] tweaked toml for crates.io crate bao_bin 0.12.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate bao_bin 0.12.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded docopt v1.1.1
[INFO] [stderr]   Downloaded os_pipe v0.9.2
[INFO] [stderr]   Downloaded duct v0.13.5
[INFO] [stderr]   Downloaded shared_child v0.3.5
[INFO] [stderr]   Downloaded backtrace v0.3.66
[INFO] [stderr]   Downloaded arrayvec v0.7.2
[INFO] [stderr]   Downloaded block-buffer v0.10.2
[INFO] [stderr]   Downloaded arrayref v0.3.6
[INFO] [stderr]   Downloaded generic-array v0.14.5
[INFO] [stderr]   Downloaded crypto-common v0.1.5
[INFO] [stderr]   Downloaded serde_derive v1.0.139
[INFO] [stderr]   Downloaded subtle v2.4.1
[INFO] [stderr]   Downloaded bao v0.12.1
[INFO] [stderr]   Downloaded typenum v1.15.0
[INFO] [stderr]   Downloaded blake3 v1.3.1
[INFO] [stderr]   Downloaded serde v1.0.139
[INFO] [stderr]   Downloaded digest v0.10.3
[INFO] [stderr]   Downloaded unicode-xid v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 04371ea853b7f9a72561fef11710537ac622be82b3ea68d2751daeaf0ff589cc
[INFO] running `Command { std: "docker" "start" "-a" "04371ea853b7f9a72561fef11710537ac622be82b3ea68d2751daeaf0ff589cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04371ea853b7f9a72561fef11710537ac622be82b3ea68d2751daeaf0ff589cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04371ea853b7f9a72561fef11710537ac622be82b3ea68d2751daeaf0ff589cc", kill_on_drop: false }`
[INFO] [stdout] 04371ea853b7f9a72561fef11710537ac622be82b3ea68d2751daeaf0ff589cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 8329f90a78fa9f034cb9cc2fd73e321863a1a0a6384578e43e9536406c547f02
[INFO] running `Command { std: "docker" "start" "-a" "8329f90a78fa9f034cb9cc2fd73e321863a1a0a6384578e43e9536406c547f02", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.139
[INFO] [stderr]    Compiling blake3 v1.3.1
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling serde v1.0.139
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking shared_child v0.3.5
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking duct v0.13.5
[INFO] [stderr]     Checking crypto-common v0.1.5
[INFO] [stderr]     Checking block-buffer v0.10.2
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking bao v0.12.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking docopt v1.1.1
[INFO] [stderr]     Checking bao_bin v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.36s
[INFO] running `Command { std: "docker" "inspect" "8329f90a78fa9f034cb9cc2fd73e321863a1a0a6384578e43e9536406c547f02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8329f90a78fa9f034cb9cc2fd73e321863a1a0a6384578e43e9536406c547f02", kill_on_drop: false }`
[INFO] [stdout] 8329f90a78fa9f034cb9cc2fd73e321863a1a0a6384578e43e9536406c547f02
[INFO] checking bao_bin-0.12.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate bao_bin 0.12.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate bao_bin 0.12.1 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 bao_bin 0.12.1
[INFO] finished tweaking crates.io crate bao_bin 0.12.1
[INFO] tweaked toml for crates.io crate bao_bin 0.12.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate bao_bin 0.12.1 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 67c7635f2712b2c0192c1cf547dd2c7793b8120befb4e2e1a60871bc3ac0507c
[INFO] running `Command { std: "docker" "start" "-a" "67c7635f2712b2c0192c1cf547dd2c7793b8120befb4e2e1a60871bc3ac0507c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67c7635f2712b2c0192c1cf547dd2c7793b8120befb4e2e1a60871bc3ac0507c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67c7635f2712b2c0192c1cf547dd2c7793b8120befb4e2e1a60871bc3ac0507c", kill_on_drop: false }`
[INFO] [stdout] 67c7635f2712b2c0192c1cf547dd2c7793b8120befb4e2e1a60871bc3ac0507c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 751a0ee4f027b80cb736ca7e234f4d5d39913add4818a3d7191ec93e5bd46b0e
[INFO] running `Command { std: "docker" "start" "-a" "751a0ee4f027b80cb736ca7e234f4d5d39913add4818a3d7191ec93e5bd46b0e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.139
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling blake3 v1.3.1
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde v1.0.139
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking shared_child v0.3.5
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking duct v0.13.5
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking block-buffer v0.10.2
[INFO] [stderr]     Checking crypto-common v0.1.5
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking bao v0.12.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking docopt v1.1.1
[INFO] [stderr]     Checking bao_bin v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.52s
[INFO] running `Command { std: "docker" "inspect" "751a0ee4f027b80cb736ca7e234f4d5d39913add4818a3d7191ec93e5bd46b0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "751a0ee4f027b80cb736ca7e234f4d5d39913add4818a3d7191ec93e5bd46b0e", kill_on_drop: false }`
[INFO] [stdout] 751a0ee4f027b80cb736ca7e234f4d5d39913add4818a3d7191ec93e5bd46b0e