[INFO] fetching crate rustproof 0.1.0...
[INFO] checking rustproof-0.1.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate rustproof 0.1.0 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate rustproof 0.1.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustproof 0.1.0
[INFO] finished tweaking crates.io crate rustproof 0.1.0
[INFO] tweaked toml for crates.io crate rustproof 0.1.0 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lalrpop-util v0.11.0
[INFO] [stderr]   Downloaded petgraph v0.1.18
[INFO] [stderr]   Downloaded regex-syntax v0.2.6
[INFO] [stderr]   Downloaded bit-set v0.3.0
[INFO] [stderr]   Downloaded atty v0.1.2
[INFO] [stderr]   Downloaded itertools v0.3.25
[INFO] [stderr]   Downloaded lalrpop-intern v0.11.0
[INFO] [stderr]   Downloaded unicode-xid v0.0.2
[INFO] [stderr]   Downloaded lalrpop-snap v0.11.0
[INFO] [stderr]   Downloaded lalrpop v0.11.0
[INFO] [stderr]   Downloaded rustproof-libsmt v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59ef8a5114e50328d0e353d81e2a90fa893dfaa71320b580ed92a0705632b66c
[INFO] running `Command { std: "docker" "start" "-a" "59ef8a5114e50328d0e353d81e2a90fa893dfaa71320b580ed92a0705632b66c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59ef8a5114e50328d0e353d81e2a90fa893dfaa71320b580ed92a0705632b66c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59ef8a5114e50328d0e353d81e2a90fa893dfaa71320b580ed92a0705632b66c", kill_on_drop: false }`
[INFO] [stdout] 59ef8a5114e50328d0e353d81e2a90fa893dfaa71320b580ed92a0705632b66c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0817cf043ec6c7e12c7f7eb1bd7030ab93807aaba88c25e56d8b0dc1e36f0b8b
[INFO] running `Command { std: "docker" "start" "-a" "0817cf043ec6c7e12c7f7eb1bd7030ab93807aaba88c25e56d8b0dc1e36f0b8b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking lalrpop-util v0.11.0
[INFO] [stderr]    Compiling petgraph v0.2.10
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking rustproof-libsmt v0.1.0
[INFO] [stderr]     Checking rustproof v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: a __rustc_plugin_registrar symbol must now be defined instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: a __rustc_plugin_registrar symbol must now be defined instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> src/lib.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[macro_use] extern crate syntax;
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustproof` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> src/lib.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[macro_use] extern crate syntax;
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0817cf043ec6c7e12c7f7eb1bd7030ab93807aaba88c25e56d8b0dc1e36f0b8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0817cf043ec6c7e12c7f7eb1bd7030ab93807aaba88c25e56d8b0dc1e36f0b8b", kill_on_drop: false }`
[INFO] [stdout] 0817cf043ec6c7e12c7f7eb1bd7030ab93807aaba88c25e56d8b0dc1e36f0b8b