[INFO] fetching crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0...
[INFO] testing markdown-renderer-that-you-probably-shouldnt-use-0.1.0 against 1.47.0 for beta-1.48-1
[INFO] extracting crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0
[INFO] finished tweaking crates.io crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0
[INFO] tweaked toml for crates.io crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate markdown-renderer-that-you-probably-shouldnt-use 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd07063b4ee8255f2501b17a2f00164604d044c6feff3affbdc9e3df041e3d93
[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" "cd07063b4ee8255f2501b17a2f00164604d044c6feff3affbdc9e3df041e3d93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd07063b4ee8255f2501b17a2f00164604d044c6feff3affbdc9e3df041e3d93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd07063b4ee8255f2501b17a2f00164604d044c6feff3affbdc9e3df041e3d93", kill_on_drop: false }`
[INFO] [stdout] cd07063b4ee8255f2501b17a2f00164604d044c6feff3affbdc9e3df041e3d93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d68491d27c93b5903a40cd2b0fe328a20d993fc86fd974693c4cdf2ce71eeccc
[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" "d68491d27c93b5903a40cd2b0fe328a20d993fc86fd974693c4cdf2ce71eeccc", kill_on_drop: false }`
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling pulldown-cmark v0.4.1
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling clap v2.33.0
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[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 `literalext`.
[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" "d68491d27c93b5903a40cd2b0fe328a20d993fc86fd974693c4cdf2ce71eeccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d68491d27c93b5903a40cd2b0fe328a20d993fc86fd974693c4cdf2ce71eeccc", kill_on_drop: false }`
[INFO] [stdout] d68491d27c93b5903a40cd2b0fe328a20d993fc86fd974693c4cdf2ce71eeccc
