[INFO] fetching crate label-generator 0.3.0...
[INFO] checking label-generator-0.3.0 against try#446cb600aa4837dd6c513f14fa0d25a909b177d7 for pr-149195
[INFO] extracting crate label-generator 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate label-generator 0.3.0
[INFO] finished tweaking crates.io crate label-generator 0.3.0
[INFO] tweaked toml for crates.io crate label-generator 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate label-generator 0.3.0 on toolchain 446cb600aa4837dd6c513f14fa0d25a909b177d7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate label-generator 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8af70db65f6b66159f33a5c29484a0119eedefd534855c62f6c0111c649f78cf
[INFO] running `Command { std: "docker" "start" "-a" "8af70db65f6b66159f33a5c29484a0119eedefd534855c62f6c0111c649f78cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8af70db65f6b66159f33a5c29484a0119eedefd534855c62f6c0111c649f78cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8af70db65f6b66159f33a5c29484a0119eedefd534855c62f6c0111c649f78cf", kill_on_drop: false }`
[INFO] [stdout] 8af70db65f6b66159f33a5c29484a0119eedefd534855c62f6c0111c649f78cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 316d8d9ae1180b8fa8c0076c12ce446b9a3b864037edbe5e792b52f7b47e156b
[INFO] running `Command { std: "docker" "start" "-a" "316d8d9ae1180b8fa8c0076c12ce446b9a3b864037edbe5e792b52f7b47e156b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling unicode-general-category v0.4.0
[INFO] [stderr]    Compiling crc32fast v1.3.1
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]     Checking ttf-parser v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking unicode-script v0.5.4
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking siphasher v0.3.9
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking unicode-bidi-mirroring v0.1.0
[INFO] [stderr]     Checking bytemuck v1.7.3
[INFO] [stderr]     Checking xmlparser v0.13.3
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking unicode-ccc v0.1.2
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]     Checking simplecss v0.2.1
[INFO] [stderr]     Checking kurbo v0.8.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking svgtypes v0.8.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking data-url v0.1.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling luajit-src v210.3.2+resty1085a4d
[INFO] [stderr]    Compiling lua-src v544.0.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking roxmltree v0.14.1
[INFO] [stderr]     Checking rctree v0.4.0
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking unicode-vo v0.1.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking pico-args v0.4.2
[INFO] [stderr]     Checking xmlwriter v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling mlua v0.7.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking memmap2 v0.5.2
[INFO] [stderr]     Checking fontdb v0.7.0
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking rustybuzz v0.4.0
[INFO] [stdout] error[E0659]: `Class` is ambiguous
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustybuzz-0.4.0/src/tables/gpos.rs:584:16
[INFO] [stdout]     |
[INFO] [stdout] 584 |     pub class: Class,
[INFO] [stdout]     |                ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of multiple glob imports of a name in the same module
[INFO] [stdout] note: `Class` could refer to the struct imported here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustybuzz-0.4.0/src/tables/gpos.rs:8:5
[INFO] [stdout]     |
[INFO] [stdout]   8 | use super::*;
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `Class` to disambiguate
[INFO] [stdout] note: `Class` could also refer to the struct imported here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustybuzz-0.4.0/src/tables/gpos.rs:7:5
[INFO] [stdout]     |
[INFO] [stdout]   7 | use super::gsubgpos::*;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `Class` to disambiguate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stdout] For more information about this error, try `rustc --explain E0659`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustybuzz` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "316d8d9ae1180b8fa8c0076c12ce446b9a3b864037edbe5e792b52f7b47e156b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "316d8d9ae1180b8fa8c0076c12ce446b9a3b864037edbe5e792b52f7b47e156b", kill_on_drop: false }`
[INFO] [stdout] 316d8d9ae1180b8fa8c0076c12ce446b9a3b864037edbe5e792b52f7b47e156b