[INFO] cloning repository https://github.com/Whazor/model_checker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Whazor/model_checker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhazor%2Fmodel_checker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhazor%2Fmodel_checker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06314d0de90dd54fbda0603da0745a240d37f07a
[INFO] checking Whazor/model_checker against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhazor%2Fmodel_checker" "/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/Whazor/model_checker on toolchain 8b72f65b805cbe4c261de45030d663f524f27376
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Whazor/model_checker
[INFO] finished tweaking git repo https://github.com/Whazor/model_checker
[INFO] tweaked toml for git repo https://github.com/Whazor/model_checker written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Whazor/model_checker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/kkawakam/rustyline`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-iter v0.1.33
[INFO] [stderr]   Downloaded aho-corasick v0.6.2
[INFO] [stderr]   Downloaded bufstream v0.1.2
[INFO] [stderr]   Downloaded smallvec v0.1.8
[INFO] [stderr]   Downloaded num-traits v0.1.37
[INFO] [stderr]   Downloaded num-bigint v0.1.37
[INFO] [stderr]   Downloaded bit-vec v0.4.3
[INFO] [stderr]   Downloaded cfg-if v0.1.0
[INFO] [stderr]   Downloaded num-rational v0.1.36
[INFO] [stderr]   Downloaded stopwatch v0.0.7
[INFO] [stderr]   Downloaded quote v0.3.12
[INFO] [stderr]   Downloaded encode_unicode v0.1.3
[INFO] [stderr]   Downloaded thread_local v0.3.3
[INFO] [stderr]   Downloaded num-integer v0.1.33
[INFO] [stderr]   Downloaded num v0.1.37
[INFO] [stderr]   Downloaded itertools v0.4.19
[INFO] [stderr]   Downloaded nix v0.7.0
[INFO] [stderr]   Downloaded num-complex v0.1.36
[INFO] [stderr]   Downloaded boolean_expression v0.3.0
[INFO] [stderr]   Downloaded peg-syntax-ext v0.5.0
[INFO] [stderr]   Downloaded peg v0.5.1
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a2856010d1007e2f77e9fe8c632c206dbb9dbbf139161656d0aa9408db656bc
[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" "0a2856010d1007e2f77e9fe8c632c206dbb9dbbf139161656d0aa9408db656bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a2856010d1007e2f77e9fe8c632c206dbb9dbbf139161656d0aa9408db656bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a2856010d1007e2f77e9fe8c632c206dbb9dbbf139161656d0aa9408db656bc", kill_on_drop: false }`
[INFO] [stdout] 0a2856010d1007e2f77e9fe8c632c206dbb9dbbf139161656d0aa9408db656bc
[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=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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb12c69f487ef7569b0c1e3fc508447843a63daf46b890cb9305dc9b02b55f9b
[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" "fb12c69f487ef7569b0c1e3fc508447843a63daf46b890cb9305dc9b02b55f9b", kill_on_drop: false }`
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking bit-vec v0.4.3
[INFO] [stderr]     Checking encode_unicode v0.1.3
[INFO] [stderr]     Checking bufstream v0.1.2
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]    Compiling peg v0.5.1
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]     Checking aho-corasick v0.6.2
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking thread_local v0.3.3
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking boolean_expression v0.3.0
[INFO] [stderr]    Compiling peg-syntax-ext v0.5.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/peg-syntax-ext-0.5.0/lib.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin_registrar, quote, rustc_private, box_patterns)]
[INFO] [stdout]   |                              ^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rustc_plugin`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/peg-syntax-ext-0.5.0/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate rustc_plugin;
[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 `peg-syntax-ext`
[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" "fb12c69f487ef7569b0c1e3fc508447843a63daf46b890cb9305dc9b02b55f9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb12c69f487ef7569b0c1e3fc508447843a63daf46b890cb9305dc9b02b55f9b", kill_on_drop: false }`
[INFO] [stdout] fb12c69f487ef7569b0c1e3fc508447843a63daf46b890cb9305dc9b02b55f9b