[INFO] cloning repository https://github.com/supdrewin/algorithm20-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/supdrewin/algorithm20-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupdrewin%2Falgorithm20-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupdrewin%2Falgorithm20-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 03ce6b3f4c5690e05227838d1796ec2d35bfd047
[INFO] testing supdrewin/algorithm20-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupdrewin%2Falgorithm20-rs" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/supdrewin/algorithm20-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-78/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/supdrewin/algorithm20-rs
[INFO] finished tweaking git repo https://github.com/supdrewin/algorithm20-rs
[INFO] tweaked toml for git repo https://github.com/supdrewin/algorithm20-rs written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e284c2d3a5d43adf144536fdfe2ae16f7ad27df1df214f6332e34d9af1a249e2
[INFO] running `Command { std: "docker" "start" "-a" "e284c2d3a5d43adf144536fdfe2ae16f7ad27df1df214f6332e34d9af1a249e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e284c2d3a5d43adf144536fdfe2ae16f7ad27df1df214f6332e34d9af1a249e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e284c2d3a5d43adf144536fdfe2ae16f7ad27df1df214f6332e34d9af1a249e2", kill_on_drop: false }`
[INFO] [stdout] e284c2d3a5d43adf144536fdfe2ae16f7ad27df1df214f6332e34d9af1a249e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e388d38b12aa5938cba3d1814ca47a4e7ff69a79828af1ae50144de5e0033cf1
[INFO] running `Command { std: "docker" "start" "-a" "e388d38b12aa5938cba3d1814ca47a4e7ff69a79828af1ae50144de5e0033cf1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling try_1 v0.1.0 (/opt/rustwide/workdir/try_1)
[INFO] [stderr]    Compiling treap v0.1.0 (/opt/rustwide/workdir/treap)
[INFO] [stderr]    Compiling try_3 v0.1.0 (/opt/rustwide/workdir/try_3)
[INFO] [stderr]    Compiling try_6 v0.1.0 (/opt/rustwide/workdir/try_6)
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir/leetcode)
[INFO] [stderr]    Compiling home v0.1.0 (/opt/rustwide/workdir/home)
[INFO] [stderr]    Compiling red_black v0.1.0 (/opt/rustwide/workdir/red_black)
[INFO] [stderr]    Compiling chips v0.1.0 (/opt/rustwide/workdir/chips)
[INFO] [stderr]    Compiling try_2 v0.1.0 (/opt/rustwide/workdir/try_2)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> try_6/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bigint_helper_methods)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `try_6` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> chips/src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> leetcode/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(mixed_integer_ops)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> treap/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extend_one)]
[INFO] [stdout]   |            ^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e388d38b12aa5938cba3d1814ca47a4e7ff69a79828af1ae50144de5e0033cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e388d38b12aa5938cba3d1814ca47a4e7ff69a79828af1ae50144de5e0033cf1", kill_on_drop: false }`
[INFO] [stdout] e388d38b12aa5938cba3d1814ca47a4e7ff69a79828af1ae50144de5e0033cf1