[INFO] cloning repository https://github.com/d34db4b3/mt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/d34db4b3/mt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd34db4b3%2Fmt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd34db4b3%2Fmt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3105c0cfb0751d07a3b3a1e7b3ce8c95b90ce016
[INFO] checking d34db4b3/mt against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd34db4b3%2Fmt" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/d34db4b3/mt on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/d34db4b3/mt
[INFO] finished tweaking git repo https://github.com/d34db4b3/mt
[INFO] tweaked toml for git repo https://github.com/d34db4b3/mt written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/d34db4b3/mt 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded primeorder v0.13.1
[INFO] [stderr]   Downloaded ecdsa v0.16.7
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a0c2bd03b4686dc6d61005eeaa83a5607ec358dc2248882784d2b4925197489
[INFO] running `Command { std: "docker" "start" "-a" "9a0c2bd03b4686dc6d61005eeaa83a5607ec358dc2248882784d2b4925197489", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a0c2bd03b4686dc6d61005eeaa83a5607ec358dc2248882784d2b4925197489", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a0c2bd03b4686dc6d61005eeaa83a5607ec358dc2248882784d2b4925197489", kill_on_drop: false }`
[INFO] [stdout] 9a0c2bd03b4686dc6d61005eeaa83a5607ec358dc2248882784d2b4925197489
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6a169b4dfb4568f59f2bd8aa33fd8fdfa8fbdc9124804986ac8add4691af37d
[INFO] running `Command { std: "docker" "start" "-a" "e6a169b4dfb4568f59f2bd8aa33fd8fdfa8fbdc9124804986ac8add4691af37d", kill_on_drop: false }`
[INFO] [stderr]     Checking zeroize v1.6.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking const-oid v0.9.2
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking base64ct v1.6.0
[INFO] [stderr]     Checking base16ct v0.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking cpufeatures v0.2.7
[INFO] [stderr]     Checking base64 v0.21.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking pem-rfc7468 v0.7.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking der v0.7.5
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ff v0.13.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking group v0.13.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking spki v0.7.2
[INFO] [stderr]     Checking pkcs8 v0.10.2
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking sec1 v0.7.2
[INFO] [stderr]     Checking crypto-bigint v0.5.2
[INFO] [stderr]     Checking digest v0.10.6
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking signature v2.1.0
[INFO] [stderr]     Checking sha2 v0.10.6
[INFO] [stderr]     Checking rfc6979 v0.4.0
[INFO] [stderr]     Checking elliptic-curve v0.13.4
[INFO] [stderr]     Checking ecdsa v0.16.7
[INFO] [stderr]     Checking primeorder v0.13.1
[INFO] [stderr]     Checking p256 v0.13.2
[INFO] [stderr]     Checking sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `matrix_multiply_mod` is never used
[INFO] [stdout]  --> src/bin/chall5/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn matrix_multiply_mod(a: &[[u64; 4]; 4], b: &[[u64; 4]; 4], m: u64) -> [[u64; 4]; 4] {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_multiply_mod` is never used
[INFO] [stdout]  --> src/bin/chall5/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn matrix_multiply_mod(a: &[[u64; 4]; 4], b: &[[u64; 4]; 4], m: u64) -> [[u64; 4]; 4] {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.60s
[INFO] running `Command { std: "docker" "inspect" "e6a169b4dfb4568f59f2bd8aa33fd8fdfa8fbdc9124804986ac8add4691af37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a169b4dfb4568f59f2bd8aa33fd8fdfa8fbdc9124804986ac8add4691af37d", kill_on_drop: false }`
[INFO] [stdout] e6a169b4dfb4568f59f2bd8aa33fd8fdfa8fbdc9124804986ac8add4691af37d