[INFO] updating cached repository https://github.com/Guang1234567/rust_web_server_demo
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c6ecbcd6280785bab8fed2afa494d70deec4394b
[INFO] testing Guang1234567/rust_web_server_demo against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGuang1234567%2Frust_web_server_demo" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Guang1234567/rust_web_server_demo on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Guang1234567/rust_web_server_demo
[INFO] finished tweaking git repo https://github.com/Guang1234567/rust_web_server_demo
[INFO] tweaked toml for git repo https://github.com/Guang1234567/rust_web_server_demo written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Guang1234567/rust_web_server_demo already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 354574daf376e7e91448b41f5a8850ce8fd0687f6681f9a9024ec0236bc44918
[INFO] running `"docker" "start" "-a" "354574daf376e7e91448b41f5a8850ce8fd0687f6681f9a9024ec0236bc44918"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0 (https://github.com/lfairy/maud#f5dbccdc)
[INFO] [stderr]    Compiling tokio-sync v0.1.7
[INFO] [stderr]    Compiling tokio-executor v0.1.8
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling unicode-normalization v0.1.9
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling maud_macros v0.21.0 (https://github.com/lfairy/maud#f5dbccdc)
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/f5dbccd/maud_macros/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_def_site)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/f5dbccd/maud_macros/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(proc_macro_diagnostic)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/f5dbccd/maud_macros/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/f5dbccd/maud_macros/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(proc_macro_quote)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/maud-588f745ae3a2d730/f5dbccd/maud_macros/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(proc_macro_span)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling tokio-threadpool v0.1.16
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-timer v0.2.11
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `maud_macros`.
[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 `"docker" "inspect" "354574daf376e7e91448b41f5a8850ce8fd0687f6681f9a9024ec0236bc44918"`
[INFO] running `"docker" "rm" "-f" "354574daf376e7e91448b41f5a8850ce8fd0687f6681f9a9024ec0236bc44918"`
[INFO] [stdout] 354574daf376e7e91448b41f5a8850ce8fd0687f6681f9a9024ec0236bc44918