[INFO] cloning repository https://github.com/wellbehavedsoftware/btrfs-dedupe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wellbehavedsoftware/btrfs-dedupe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwellbehavedsoftware%2Fbtrfs-dedupe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwellbehavedsoftware%2Fbtrfs-dedupe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf8d1a82fee2ff8635d00865acc1033707957c9e
[INFO] testing wellbehavedsoftware/btrfs-dedupe against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwellbehavedsoftware%2Fbtrfs-dedupe" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wellbehavedsoftware/btrfs-dedupe on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wellbehavedsoftware/btrfs-dedupe
[INFO] finished tweaking git repo https://github.com/wellbehavedsoftware/btrfs-dedupe
[INFO] tweaked toml for git repo https://github.com/wellbehavedsoftware/btrfs-dedupe written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/wellbehavedsoftware/btrfs-dedupe already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syntex_errors v0.52.0
[INFO] [stderr]   Downloaded syntex_pos v0.52.0
[INFO] [stderr]   Downloaded minilzo v0.1.0
[INFO] [stderr]   Downloaded output v0.4.1
[INFO] [stderr]   Downloaded btrfs v1.2.1
[INFO] [stderr]   Downloaded ioctl v0.3.3
[INFO] [stderr]   Downloaded nodrop v0.1.8
[INFO] [stderr]   Downloaded termion v1.1.4
[INFO] [stderr]   Downloaded typenum v1.5.1
[INFO] [stderr]   Downloaded syntex_syntax v0.52.0
[INFO] [stderr]   Downloaded byte-tools v0.1.2
[INFO] [stderr]   Downloaded sha2 v0.4.0
[INFO] [stderr]   Downloaded syntex v0.52.0
[INFO] [stderr]   Downloaded syn v0.10.6
[INFO] [stderr]   Downloaded generic-array v0.6.0
[INFO] [stderr]   Downloaded digest-buffer v0.2.0
[INFO] [stderr]   Downloaded digest v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72d3b6080b3c8a9e64c2ef892e38f4acb0d68afb9d78ba79e95038a1647b9f91
[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" "72d3b6080b3c8a9e64c2ef892e38f4acb0d68afb9d78ba79e95038a1647b9f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72d3b6080b3c8a9e64c2ef892e38f4acb0d68afb9d78ba79e95038a1647b9f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d3b6080b3c8a9e64c2ef892e38f4acb0d68afb9d78ba79e95038a1647b9f91", kill_on_drop: false }`
[INFO] [stdout] 72d3b6080b3c8a9e64c2ef892e38f4acb0d68afb9d78ba79e95038a1647b9f91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a70d28cd414e0996d06c1cb96b8d160def2aa16f5f40314a9df4df8a030021a
[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" "0a70d28cd414e0996d06c1cb96b8d160def2aa16f5f40314a9df4df8a030021a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling typenum v1.5.1
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]    Compiling odds v0.2.25
[INFO] [stderr]    Compiling lazy_static v0.2.2
[INFO] [stderr]    Compiling byte-tools v0.1.2
[INFO] [stderr]    Compiling serde v0.8.21
[INFO] [stderr]    Compiling unicode-segmentation v1.0.1
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling uuid v0.3.1
[INFO] [stderr]    Compiling num-traits v0.1.36
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling minilzo-sys v0.1.0
[INFO] [stderr]    Compiling term_size v0.2.1
[INFO] [stderr]    Compiling termion v1.1.4
[INFO] [stderr]    Compiling ioctl v0.3.3
[INFO] [stderr]    Compiling crc v1.4.0
[INFO] [stderr]    Compiling minilzo v0.1.0
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling nodrop v0.1.8
[INFO] [stderr]    Compiling syn v0.10.6
[INFO] [stderr]    Compiling output v0.4.1
[INFO] [stderr]    Compiling clap v2.20.0
[INFO] [stderr]    Compiling miniz-sys v0.1.7
[INFO] [stderr]    Compiling flate2 v0.2.14
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling generic-array v0.6.0
[INFO] [stderr]    Compiling btrfs v1.2.1
[INFO] [stderr]    Compiling digest v0.4.0
[INFO] [stderr]    Compiling digest-buffer v0.2.0
[INFO] [stderr]    Compiling sha2 v0.4.0
[INFO] [stderr]    Compiling serde_json v0.8.4
[INFO] [stderr]    Compiling syntex_pos v0.52.0
[INFO] [stderr]    Compiling syntex_errors v0.52.0
[INFO] [stderr]    Compiling syntex_syntax v0.52.0
[INFO] [stdout] error[E0423]: expected function, tuple struct or tuple variant, found struct `ast::Name`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syntex_syntax-0.52.0/src/symbol.rs:146:27
[INFO] [stdout]     |
[INFO] [stdout] 146 |                       name: ast::Name($index),
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 165 | / declare_keywords! {
[INFO] [stdout] 166 | |     // Invalid identifier
[INFO] [stdout] 167 | |     (0,  Invalid,        "")
[INFO] [stdout] 168 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 228 | |     (55, Union,          "union")
[INFO] [stdout] 229 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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 E0423`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syntex_syntax`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0a70d28cd414e0996d06c1cb96b8d160def2aa16f5f40314a9df4df8a030021a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a70d28cd414e0996d06c1cb96b8d160def2aa16f5f40314a9df4df8a030021a", kill_on_drop: false }`
[INFO] [stdout] 0a70d28cd414e0996d06c1cb96b8d160def2aa16f5f40314a9df4df8a030021a