[INFO] cloning repository https://github.com/ColbyCypherSociety/ChatDemo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ColbyCypherSociety/ChatDemo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FColbyCypherSociety%2FChatDemo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FColbyCypherSociety%2FChatDemo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c2391202d6c30fef54813e5cdfa601dec45d3d3
[INFO] testing ColbyCypherSociety/ChatDemo against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FColbyCypherSociety%2FChatDemo" "/workspace/builds/worker-97/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-97/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ColbyCypherSociety/ChatDemo on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ColbyCypherSociety/ChatDemo
[INFO] finished tweaking git repo https://github.com/ColbyCypherSociety/ChatDemo
[INFO] tweaked toml for git repo https://github.com/ColbyCypherSociety/ChatDemo written to /workspace/builds/worker-97/source/Cargo.toml
[INFO] crate git repo https://github.com/ColbyCypherSociety/ChatDemo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 547a1bc43718ef2f3474a58de6d232eff7ef4b6c6afe15ce4676a116b66fb805
[INFO] running `Command { std: "docker" "start" "-a" "547a1bc43718ef2f3474a58de6d232eff7ef4b6c6afe15ce4676a116b66fb805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "547a1bc43718ef2f3474a58de6d232eff7ef4b6c6afe15ce4676a116b66fb805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "547a1bc43718ef2f3474a58de6d232eff7ef4b6c6afe15ce4676a116b66fb805", kill_on_drop: false }`
[INFO] [stdout] 547a1bc43718ef2f3474a58de6d232eff7ef4b6c6afe15ce4676a116b66fb805
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e609b4a13e3602ad49d76aa74b9d2a23e8eb1265936a237b7cae5cec3ff7634e
[INFO] running `Command { std: "docker" "start" "-a" "e609b4a13e3602ad49d76aa74b9d2a23e8eb1265936a237b7cae5cec3ff7634e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling ryu v0.2.4
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stdout] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
[INFO] [stdout]     |
[INFO] [stdout] 359 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stdout]     = help: add `#![feature(proc_macro_def_site)]` to the crate attributes to enable
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e609b4a13e3602ad49d76aa74b9d2a23e8eb1265936a237b7cae5cec3ff7634e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e609b4a13e3602ad49d76aa74b9d2a23e8eb1265936a237b7cae5cec3ff7634e", kill_on_drop: false }`
[INFO] [stdout] e609b4a13e3602ad49d76aa74b9d2a23e8eb1265936a237b7cae5cec3ff7634e