[INFO] cloning repository https://github.com/cypriansakwa/Fast_Powering
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cypriansakwa/Fast_Powering" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcypriansakwa%2FFast_Powering", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcypriansakwa%2FFast_Powering'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4513e26dba898dc7f84625dcac07e6d117f4a3b0
[INFO] building cypriansakwa/Fast_Powering/4513e26dba898dc7f84625dcac07e6d117f4a3b0 against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcypriansakwa%2FFast_Powering" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cypriansakwa/Fast_Powering on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cypriansakwa/Fast_Powering
[INFO] finished tweaking git repo https://github.com/cypriansakwa/Fast_Powering
[INFO] tweaked toml for git repo https://github.com/cypriansakwa/Fast_Powering written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cypriansakwa/Fast_Powering 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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af09a1d64add8e62f023119cfb51829766338c4ab68b5681b2a45b9398ba38ad
[INFO] running `Command { std: "docker" "start" "-a" "af09a1d64add8e62f023119cfb51829766338c4ab68b5681b2a45b9398ba38ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af09a1d64add8e62f023119cfb51829766338c4ab68b5681b2a45b9398ba38ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af09a1d64add8e62f023119cfb51829766338c4ab68b5681b2a45b9398ba38ad", kill_on_drop: false }`
[INFO] [stdout] af09a1d64add8e62f023119cfb51829766338c4ab68b5681b2a45b9398ba38ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02cc30a3f710b2170cc506c3e09e5af32aa4aaa6138586bfef2781ef0802e564
[INFO] running `Command { std: "docker" "start" "-a" "02cc30a3f710b2170cc506c3e09e5af32aa4aaa6138586bfef2781ef0802e564", kill_on_drop: false }`
[INFO] [stderr]    Compiling Fast_Powering_Algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "02cc30a3f710b2170cc506c3e09e5af32aa4aaa6138586bfef2781ef0802e564", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02cc30a3f710b2170cc506c3e09e5af32aa4aaa6138586bfef2781ef0802e564", kill_on_drop: false }`
[INFO] [stdout] 02cc30a3f710b2170cc506c3e09e5af32aa4aaa6138586bfef2781ef0802e564
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bc4d2601d130fa3edfee7ecd498a4c604b9f907130f8047eefd89990e8f1e0f
[INFO] running `Command { std: "docker" "start" "-a" "1bc4d2601d130fa3edfee7ecd498a4c604b9f907130f8047eefd89990e8f1e0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling Fast_Powering_Algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "1bc4d2601d130fa3edfee7ecd498a4c604b9f907130f8047eefd89990e8f1e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bc4d2601d130fa3edfee7ecd498a4c604b9f907130f8047eefd89990e8f1e0f", kill_on_drop: false }`
[INFO] [stdout] 1bc4d2601d130fa3edfee7ecd498a4c604b9f907130f8047eefd89990e8f1e0f