[INFO] fetching crate macro-machines 0.10.1...
[INFO] checking macro-machines-0.10.1 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate macro-machines 0.10.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate macro-machines 0.10.1 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate macro-machines 0.10.1
[INFO] finished tweaking crates.io crate macro-machines 0.10.1
[INFO] tweaked toml for crates.io crate macro-machines 0.10.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate macro-machines 0.10.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--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 autocfg v0.1.7
[INFO] [stderr]   Downloaded redox_syscall v0.1.56
[INFO] [stderr]   Downloaded winapi-util v0.1.5
[INFO] [stderr]   Downloaded simplelog v0.8.0
[INFO] [stderr]   Downloaded marksman_escape v0.1.2
[INFO] [stderr]   Downloaded variant_count v1.0.0
[INFO] [stderr]   Downloaded chrono v0.4.10
[INFO] [stderr]   Downloaded time v0.1.42
[INFO] [stderr]   Downloaded libc v0.2.66
[INFO] [stderr]   Downloaded winapi v0.3.8
[INFO] [stderr]   Downloaded log v0.4.8
[INFO] [stderr]   Downloaded unwrap v1.2.1
[INFO] [stderr]   Downloaded termcolor v1.1.0
[INFO] [stderr]   Downloaded num-integer v0.1.41
[INFO] [stderr]   Downloaded num-traits v0.2.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5539460c9cfbc12b09bedf0ea1f2d328360d060083881b19fff17bcadd20f7a3
[INFO] running `Command { std: "docker" "start" "-a" "5539460c9cfbc12b09bedf0ea1f2d328360d060083881b19fff17bcadd20f7a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5539460c9cfbc12b09bedf0ea1f2d328360d060083881b19fff17bcadd20f7a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5539460c9cfbc12b09bedf0ea1f2d328360d060083881b19fff17bcadd20f7a3", kill_on_drop: false }`
[INFO] [stdout] 5539460c9cfbc12b09bedf0ea1f2d328360d060083881b19fff17bcadd20f7a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e539a91bdd3f6941e4bb91466f2602a4c677d74ca04e0213764963772c4df003
[INFO] running `Command { std: "docker" "start" "-a" "e539a91bdd3f6941e4bb91466f2602a4c677d74ca04e0213764963772c4df003", 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] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking marksman_escape v0.1.2
[INFO] [stderr]     Checking unwrap v1.2.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking simplelog v0.8.0
[INFO] [stderr]    Compiling variant_count v1.0.0
[INFO] [stderr]     Checking macro-machines v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro expansion ends with an incomplete expression: expected expression
[INFO] [stdout]    --> src/macro_def.rs:561:28
[INFO] [stdout]     |
[INFO] [stdout] 561 |     #[allow(unused_braces)]
[INFO] [stdout]     |                            ^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]     --> /opt/rustwide/workdir/src/macro_def.rs:1820:6
[INFO] [stdout]      |
[INFO] [stdout] 1820 |     $($action)*
[INFO] [stdout]      |      ^^^^^^^^^ help: remove these braces
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `macro-machines`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e539a91bdd3f6941e4bb91466f2602a4c677d74ca04e0213764963772c4df003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e539a91bdd3f6941e4bb91466f2602a4c677d74ca04e0213764963772c4df003", kill_on_drop: false }`
[INFO] [stdout] e539a91bdd3f6941e4bb91466f2602a4c677d74ca04e0213764963772c4df003