[INFO] cloning repository https://github.com/voberle/synacor-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/voberle/synacor-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoberle%2Fsynacor-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoberle%2Fsynacor-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d2abd7a7eadb1250bf9e0c07293ff3846f7ebb0
[INFO] checking voberle/synacor-challenge against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoberle%2Fsynacor-challenge" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/voberle/synacor-challenge 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/voberle/synacor-challenge
[INFO] finished tweaking git repo https://github.com/voberle/synacor-challenge
[INFO] tweaked toml for git repo https://github.com/voberle/synacor-challenge written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/voberle/synacor-challenge 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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f10cde46490148dfa94c3769e3eb30241843e2607bca58e0dcbd2f5a285b0bfa
[INFO] running `Command { std: "docker" "start" "-a" "f10cde46490148dfa94c3769e3eb30241843e2607bca58e0dcbd2f5a285b0bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f10cde46490148dfa94c3769e3eb30241843e2607bca58e0dcbd2f5a285b0bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f10cde46490148dfa94c3769e3eb30241843e2607bca58e0dcbd2f5a285b0bfa", kill_on_drop: false }`
[INFO] [stdout] f10cde46490148dfa94c3769e3eb30241843e2607bca58e0dcbd2f5a285b0bfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 522d154685a4e17aac31c2991ebe0fed2ab4a894d86ad4ba5af591d00cf228a0
[INFO] running `Command { std: "docker" "start" "-a" "522d154685a4e17aac31c2991ebe0fed2ab4a894d86ad4ba5af591d00cf228a0", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking synacor_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rayon::prelude::*`
[INFO] [stdout]  --> src/maze/teleporter_code.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rayon::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]    --> src/vm/instructions/binary_op.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 185 |     use crate::vm::register::RegNb;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]    --> src/vm/instructions/cmp_op.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     use super::*;
[INFO] [stdout]     |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 132 |     use crate::vm::register::RegNb;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/mem_read.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 65 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/set.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 59 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/stack_pop.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 56 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/unary_op.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 63 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.04s
[INFO] running `Command { std: "docker" "inspect" "522d154685a4e17aac31c2991ebe0fed2ab4a894d86ad4ba5af591d00cf228a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "522d154685a4e17aac31c2991ebe0fed2ab4a894d86ad4ba5af591d00cf228a0", kill_on_drop: false }`
[INFO] [stdout] 522d154685a4e17aac31c2991ebe0fed2ab4a894d86ad4ba5af591d00cf228a0
[INFO] checking voberle/synacor-challenge against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoberle%2Fsynacor-challenge" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/voberle/synacor-challenge 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/voberle/synacor-challenge
[INFO] finished tweaking git repo https://github.com/voberle/synacor-challenge
[INFO] tweaked toml for git repo https://github.com/voberle/synacor-challenge written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/voberle/synacor-challenge 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] dc701f60acab0c119786c9914ad40041dc677156eca5a0c3ac685b63338071d5
[INFO] running `Command { std: "docker" "start" "-a" "dc701f60acab0c119786c9914ad40041dc677156eca5a0c3ac685b63338071d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc701f60acab0c119786c9914ad40041dc677156eca5a0c3ac685b63338071d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc701f60acab0c119786c9914ad40041dc677156eca5a0c3ac685b63338071d5", kill_on_drop: false }`
[INFO] [stdout] dc701f60acab0c119786c9914ad40041dc677156eca5a0c3ac685b63338071d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ae090d8703d202c0becd518cc9bf35b1a283d797e107104caec0881e1dc5883c
[INFO] running `Command { std: "docker" "start" "-a" "ae090d8703d202c0becd518cc9bf35b1a283d797e107104caec0881e1dc5883c", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking synacor_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rayon::prelude::*`
[INFO] [stdout]  --> src/maze/teleporter_code.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rayon::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]    --> src/vm/instructions/binary_op.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 185 |     use crate::vm::register::RegNb;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]    --> src/vm/instructions/cmp_op.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     use super::*;
[INFO] [stdout]     |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 132 |     use crate::vm::register::RegNb;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/mem_read.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 65 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/set.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 59 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/stack_pop.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 56 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegNb` is imported redundantly
[INFO] [stdout]   --> src/vm/instructions/unary_op.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     use super::*;
[INFO] [stdout]    |         -------- the item `RegNb` is already imported here
[INFO] [stdout] 63 |     use crate::vm::register::RegNb;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.42s
[INFO] running `Command { std: "docker" "inspect" "ae090d8703d202c0becd518cc9bf35b1a283d797e107104caec0881e1dc5883c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae090d8703d202c0becd518cc9bf35b1a283d797e107104caec0881e1dc5883c", kill_on_drop: false }`
[INFO] [stdout] ae090d8703d202c0becd518cc9bf35b1a283d797e107104caec0881e1dc5883c