[INFO] cloning repository https://github.com/jtgeibel/jtg-twitter-streams
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jtgeibel/jtg-twitter-streams" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtgeibel%2Fjtg-twitter-streams", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtgeibel%2Fjtg-twitter-streams'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0006dd2f4db9020fc70f5f3141a69323d057e155
[INFO] checking jtgeibel/jtg-twitter-streams against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtgeibel%2Fjtg-twitter-streams" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jtgeibel/jtg-twitter-streams 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/jtgeibel/jtg-twitter-streams
[INFO] finished tweaking git repo https://github.com/jtgeibel/jtg-twitter-streams
[INFO] tweaked toml for git repo https://github.com/jtgeibel/jtg-twitter-streams written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/jtgeibel/jtg-twitter-streams 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]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 7344fe18c85ca7d1816d454d16ec3a7ddf59e18ababe1a1dc604413135ee167e
[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" "7344fe18c85ca7d1816d454d16ec3a7ddf59e18ababe1a1dc604413135ee167e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7344fe18c85ca7d1816d454d16ec3a7ddf59e18ababe1a1dc604413135ee167e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7344fe18c85ca7d1816d454d16ec3a7ddf59e18ababe1a1dc604413135ee167e", kill_on_drop: false }`
[INFO] [stdout] 7344fe18c85ca7d1816d454d16ec3a7ddf59e18ababe1a1dc604413135ee167e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 558b43dd3045488d12abbae52aa8eddf6cfa0d6124a0133f2aa414732f130c7f
[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" "558b43dd3045488d12abbae52aa8eddf6cfa0d6124a0133f2aa414732f130c7f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.65
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[INFO] [stderr]    Compiling syn v0.14.9
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[INFO] [stderr]     Checking generic-array v0.12.3
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[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking servo-fontconfig v0.4.0
[INFO] [stderr]     Checking euclid v0.20.3
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking num-traits v0.1.43
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[INFO] [stderr]     Checking string v0.2.1
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[INFO] [stderr]     Checking sha-1 v0.8.1
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[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.14.9/src/parsers.rs:68:48
[INFO] [stdout]      |
[INFO] [stdout] 68   |           fn $name(i: $crate::buffer::Cursor) -> $crate::synom::PResult<$o> {
[INFO] [stdout]      |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected enum `std::result::Result`, found `()`
[INFO] [stdout] 69   |               $submac!(i, $($args)*)
[INFO] [stdout]      |                                    - help: consider removing this semicolon
[INFO] [stdout]      | 
[INFO] [stdout]     ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.14.9/src/expr.rs:1785:12
[INFO] [stdout]      |
[INFO] [stdout] 1785 |       named!(and_call -> (token::Paren, Punctuated<Expr, Token![,]>),
[INFO] [stdout]      |       -      -------- implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]      |  _____|
[INFO] [stdout]      | |
[INFO] [stdout] 1786 | |         parens!(Punctuated::parse_terminated)
[INFO] [stdout] 1787 | |     );
[INFO] [stdout]      | |______- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note:   expected enum `std::result::Result<((Paren, punctuated::Punctuated<expr::Expr, Comma>), buffer::Cursor<'_>), error::ParseError>`
[INFO] [stdout]              found unit type `()`
[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] [stderr]     Checking serde_json v0.9.10
[INFO] [stderr]     Checking rusttype v0.8.1
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking lyon_geom v0.14.1
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn`
[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" "558b43dd3045488d12abbae52aa8eddf6cfa0d6124a0133f2aa414732f130c7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "558b43dd3045488d12abbae52aa8eddf6cfa0d6124a0133f2aa414732f130c7f", kill_on_drop: false }`
[INFO] [stdout] 558b43dd3045488d12abbae52aa8eddf6cfa0d6124a0133f2aa414732f130c7f