[INFO] cloning repository https://github.com/Michael0x2a/impo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Michael0x2a/impo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael0x2a%2Fimpo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael0x2a%2Fimpo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a49d12d09be2b0e4f97419d7165a8a79dd845cd
[INFO] checking Michael0x2a/impo against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael0x2a%2Fimpo" "/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/Michael0x2a/impo on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Michael0x2a/impo
[INFO] finished tweaking git repo https://github.com/Michael0x2a/impo
[INFO] tweaked toml for git repo https://github.com/Michael0x2a/impo written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Michael0x2a/impo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded snowflake v1.3.0
[INFO] [stderr]   Downloaded failure_derive v0.1.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.8
[INFO] [stderr]   Downloaded cc v1.0.15
[INFO] [stderr]   Downloaded failure v0.1.1
[INFO] [stderr]   Downloaded backtrace-sys v0.1.21
[INFO] [stderr]   Downloaded backtrace v0.3.8
[INFO] [stderr]   Downloaded libc v0.2.41
[INFO] [stderr]   Downloaded synstructure v0.6.1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ea753d5bc4e2534b927832cfe3d32dd4632e7c913af55975141d70f0d3668b4
[INFO] running `Command { std: "docker" "start" "-a" "2ea753d5bc4e2534b927832cfe3d32dd4632e7c913af55975141d70f0d3668b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ea753d5bc4e2534b927832cfe3d32dd4632e7c913af55975141d70f0d3668b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ea753d5bc4e2534b927832cfe3d32dd4632e7c913af55975141d70f0d3668b4", kill_on_drop: false }`
[INFO] [stdout] 2ea753d5bc4e2534b927832cfe3d32dd4632e7c913af55975141d70f0d3668b4
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8519eadd15e804aafc995fdf53458dda1e468147fb12c6a6f652d1285d4e868f
[INFO] running `Command { std: "docker" "start" "-a" "8519eadd15e804aafc995fdf53458dda1e468147fb12c6a6f652d1285d4e868f", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking rustc-demangle v0.1.8
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.21
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/attr.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | /     named!(pub outer_attr -> Attribute, alt!(
[INFO] [stdout] 160 | |         do_parse!(
[INFO] [stdout] 161 | |             punct!("#") >>
[INFO] [stdout] 162 | |             punct!("[") >>
[INFO] [stdout] ...   |
[INFO] [stdout] 198 | |         )
[INFO] [stdout] 199 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/constant.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | /     named!(pub const_expr -> ConstExpr, do_parse!(
[INFO] [stdout] 56 | |         mut e: alt!(
[INFO] [stdout] 57 | |             expr_unary
[INFO] [stdout] 58 | |             |
[INFO] [stdout] ...  |
[INFO] [stdout] 88 | |         (e)
[INFO] [stdout] 89 | |     ));
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `tap` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/constant.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | /     named!(pub const_expr -> ConstExpr, do_parse!(
[INFO] [stdout] 56 | |         mut e: alt!(
[INFO] [stdout] 57 | |             expr_unary
[INFO] [stdout] 58 | |             |
[INFO] [stdout] ...  |
[INFO] [stdout] 88 | |         (e)
[INFO] [stdout] 89 | |     ));
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `tap` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/constant.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | /     named!(pub const_expr -> ConstExpr, do_parse!(
[INFO] [stdout] 56 | |         mut e: alt!(
[INFO] [stdout] 57 | |             expr_unary
[INFO] [stdout] 58 | |             |
[INFO] [stdout] ...  |
[INFO] [stdout] 88 | |         (e)
[INFO] [stdout] 89 | |     ));
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `tap` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/constant.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | /     named!(pub const_expr -> ConstExpr, do_parse!(
[INFO] [stdout] 56 | |         mut e: alt!(
[INFO] [stdout] 57 | |             expr_unary
[INFO] [stdout] 58 | |             |
[INFO] [stdout] ...  |
[INFO] [stdout] 88 | |         (e)
[INFO] [stdout] 89 | |     ));
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `tap` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/mac.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 270 | /     named!(doc_comment -> String, alt!(
[INFO] [stdout] 271 | |         do_parse!(
[INFO] [stdout] 272 | |             punct!("//!") >>
[INFO] [stdout] 273 | |             content: take_until!("\n") >>
[INFO] [stdout] ...   |
[INFO] [stdout] 296 | |         )
[INFO] [stdout] 297 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/mac.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 270 | /     named!(doc_comment -> String, alt!(
[INFO] [stdout] 271 | |         do_parse!(
[INFO] [stdout] 272 | |             punct!("//!") >>
[INFO] [stdout] 273 | |             content: take_until!("\n") >>
[INFO] [stdout] ...   |
[INFO] [stdout] 296 | |         )
[INFO] [stdout] 297 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/ty.rs:318:5
[INFO] [stdout]     |
[INFO] [stdout] 318 | /     named!(ty_rptr -> Ty, do_parse!(
[INFO] [stdout] 319 | |         punct!("&") >>
[INFO] [stdout] 320 | |         life: option!(lifetime) >>
[INFO] [stdout] 321 | |         mutability: mutability >>
[INFO] [stdout] ...   |
[INFO] [stdout] 326 | |         })))
[INFO] [stdout] 327 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/ty.rs:329:5
[INFO] [stdout]     |
[INFO] [stdout] 329 | /     named!(ty_bare_fn -> Ty, do_parse!(
[INFO] [stdout] 330 | |         lifetimes: opt_vec!(do_parse!(
[INFO] [stdout] 331 | |             keyword!("for") >>
[INFO] [stdout] 332 | |             punct!("<") >>
[INFO] [stdout] ...   |
[INFO] [stdout] 359 | |         })))
[INFO] [stdout] 360 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/ty.rs:371:5
[INFO] [stdout]     |
[INFO] [stdout] 371 | /     named!(ty_path -> Ty, do_parse!(
[INFO] [stdout] 372 | |         qpath: qpath >>
[INFO] [stdout] 373 | |         parenthesized: cond!(
[INFO] [stdout] 374 | |             qpath.1.segments.last().unwrap().parameters == PathParameters::none(),
[INFO] [stdout] ...   |
[INFO] [stdout] 396 | |         })
[INFO] [stdout] 397 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/ty.rs:481:5
[INFO] [stdout]     |
[INFO] [stdout] 481 | /     named!(path_segment -> PathSegment, alt!(
[INFO] [stdout] 482 | |         do_parse!(
[INFO] [stdout] 483 | |             id: option!(ident) >>
[INFO] [stdout] 484 | |             punct!("<") >>
[INFO] [stdout] ...   |
[INFO] [stdout] 519 | |         ), Into::into)
[INFO] [stdout] 520 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.11.11/src/ty.rs:571:5
[INFO] [stdout]     |
[INFO] [stdout] 571 | /     named!(pub abi -> Abi, do_parse!(
[INFO] [stdout] 572 | |         keyword!("extern") >>
[INFO] [stdout] 573 | |         name: option!(quoted_string) >>
[INFO] [stdout] 574 | |         (match name {
[INFO] [stdout] ...   |
[INFO] [stdout] 577 | |         })
[INFO] [stdout] 578 | |     ));
[INFO] [stdout]     | |_______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `option` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 12 previous errors
[INFO] [stdout] 
[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" "8519eadd15e804aafc995fdf53458dda1e468147fb12c6a6f652d1285d4e868f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8519eadd15e804aafc995fdf53458dda1e468147fb12c6a6f652d1285d4e868f", kill_on_drop: false }`
[INFO] [stdout] 8519eadd15e804aafc995fdf53458dda1e468147fb12c6a6f652d1285d4e868f