[INFO] cloning repository https://github.com/linclark/enigma
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/linclark/enigma" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinclark%2Fenigma", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinclark%2Fenigma'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14e791b395256951642844d0f2aa572d99bb7f22
[INFO] checking linclark/enigma against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinclark%2Fenigma" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/linclark/enigma on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/linclark/enigma
[INFO] finished tweaking git repo https://github.com/linclark/enigma
[INFO] tweaked toml for git repo https://github.com/linclark/enigma written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/linclark/enigma already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4fc8f8f2d83d226d19942606884ab3a98d88a641d9720b4089068ea65b768e7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b4fc8f8f2d83d226d19942606884ab3a98d88a641d9720b4089068ea65b768e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4fc8f8f2d83d226d19942606884ab3a98d88a641d9720b4089068ea65b768e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4fc8f8f2d83d226d19942606884ab3a98d88a641d9720b4089068ea65b768e7", kill_on_drop: false }`
[INFO] [stdout] b4fc8f8f2d83d226d19942606884ab3a98d88a641d9720b4089068ea65b768e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10afb286d60b6fbc47dfd7652685e59398c55c97daf3ccb3f4e69b043c3c83a4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "10afb286d60b6fbc47dfd7652685e59398c55c97daf3ccb3f4e69b043c3c83a4", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.18
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking ultra v0.3.1 (https://github.com/linclark/ultra#cc71bafb)
[INFO] [stdout] error[E0282]: type annotations needed for `Vec<(&str, _)>`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/ultra-e470c45dfa05ab13/cc71baf/src/decrypt.rs:26:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut qgrams = Vec::new();
[INFO] [stdout]    |             ---------- consider giving `qgrams` the explicit type `Vec<(&str, _)>`, with the type parameters specified
[INFO] [stdout] ...
[INFO] [stdout] 26 |             let frequency = (n as f64) / (total as f64);
[INFO] [stdout]    |                             ^^^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]    = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ultra`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "10afb286d60b6fbc47dfd7652685e59398c55c97daf3ccb3f4e69b043c3c83a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10afb286d60b6fbc47dfd7652685e59398c55c97daf3ccb3f4e69b043c3c83a4", kill_on_drop: false }`
[INFO] [stdout] 10afb286d60b6fbc47dfd7652685e59398c55c97daf3ccb3f4e69b043c3c83a4