[INFO] cloning repository https://github.com/sgrif/shitty-blog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sgrif/shitty-blog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fshitty-blog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fshitty-blog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73a9e2d4e34cf09cc29067c756c7392123f84844
[INFO] testing sgrif/shitty-blog against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fshitty-blog" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sgrif/shitty-blog on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sgrif/shitty-blog
[INFO] finished tweaking git repo https://github.com/sgrif/shitty-blog
[INFO] tweaked toml for git repo https://github.com/sgrif/shitty-blog written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/sgrif/shitty-blog already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 731abdd9d12a1fe6cff77a4640c4fd7640f7e2d918e6fc54639329048a5936be
[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" "731abdd9d12a1fe6cff77a4640c4fd7640f7e2d918e6fc54639329048a5936be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "731abdd9d12a1fe6cff77a4640c4fd7640f7e2d918e6fc54639329048a5936be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "731abdd9d12a1fe6cff77a4640c4fd7640f7e2d918e6fc54639329048a5936be", kill_on_drop: false }`
[INFO] [stdout] 731abdd9d12a1fe6cff77a4640c4fd7640f7e2d918e6fc54639329048a5936be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 683e765c60410860b43b25d6d50f183c971978ff919fe9d80bf59e077a0e8b53
[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" "683e765c60410860b43b25d6d50f183c971978ff919fe9d80bf59e077a0e8b53", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]    Compiling unicode-normalization v0.1.3
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.3
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling serde v0.8.21
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling unidecode v0.2.0
[INFO] [stderr]    Compiling pest v0.4.0
[INFO] [stderr]    Compiling humansize v0.1.1
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling unicode-bidi v0.2.4
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling mime v0.2.2
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling rocket_codegen v0.1.3
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.1.3/build.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling memchr v0.1.11
[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 `rocket_codegen`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "683e765c60410860b43b25d6d50f183c971978ff919fe9d80bf59e077a0e8b53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "683e765c60410860b43b25d6d50f183c971978ff919fe9d80bf59e077a0e8b53", kill_on_drop: false }`
[INFO] [stdout] 683e765c60410860b43b25d6d50f183c971978ff919fe9d80bf59e077a0e8b53