[INFO] fetching crate zc 0.4.0...
[INFO] testing zc-0.4.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate zc 0.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate zc 0.4.0
[INFO] finished tweaking crates.io crate zc 0.4.0
[INFO] tweaked toml for crates.io crate zc 0.4.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate zc 0.4.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zc 0.4.0 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-xid v0.2.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.24
[INFO] [stderr]   Downloaded aliasable v0.1.3
[INFO] [stderr]   Downloaded quote v1.0.8
[INFO] [stderr]   Downloaded bytecount v0.6.2
[INFO] [stderr]   Downloaded memchr v2.3.4
[INFO] [stderr]   Downloaded rustversion v1.0.4
[INFO] [stderr]   Downloaded dangerous v0.8.0
[INFO] [stderr]   Downloaded serde_derive v1.0.120
[INFO] [stderr]   Downloaded serde_json v1.0.61
[INFO] [stderr]   Downloaded serde v1.0.120
[INFO] [stderr]   Downloaded syn v1.0.58
[INFO] [stderr]   Downloaded ryu v1.0.5
[INFO] [stderr]   Downloaded toml v0.5.8
[INFO] [stderr]   Downloaded trybuild v1.0.38
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded glob v0.3.0
[INFO] [stderr]   Downloaded itoa v0.4.7
[INFO] [stderr]   Downloaded zc-derive v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48e011caaecb246b1c0b4fff1acd163e25c6ac88f53c0a178f95873e99da47b7
[INFO] running `Command { std: "docker" "start" "-a" "48e011caaecb246b1c0b4fff1acd163e25c6ac88f53c0a178f95873e99da47b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48e011caaecb246b1c0b4fff1acd163e25c6ac88f53c0a178f95873e99da47b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48e011caaecb246b1c0b4fff1acd163e25c6ac88f53c0a178f95873e99da47b7", kill_on_drop: false }`
[INFO] [stdout] 48e011caaecb246b1c0b4fff1acd163e25c6ac88f53c0a178f95873e99da47b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f221de40592f4690b0a467e19ac952729d2f055f5a5b6454b1e31bc83ff6cc0e
[INFO] running `Command { std: "docker" "start" "-a" "f221de40592f4690b0a467e19ac952729d2f055f5a5b6454b1e31bc83ff6cc0e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling zc-derive v0.4.0
[INFO] [stderr]    Compiling zc v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:152:36
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub fn get<'a, T>(&'a self) -> &T
[INFO] [stdout]     |                        --          ^^ the same lifetime is elided here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:16:5
[INFO] [stdout]     |
[INFO] [stdout]  16 |     warnings
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     = note: `#[forbid(mismatched_lifetime_syntaxes)]` implied by `#[forbid(warnings)]`
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub fn get<'a, T>(&'a self) -> &'a T
[INFO] [stdout]     |                                     ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f221de40592f4690b0a467e19ac952729d2f055f5a5b6454b1e31bc83ff6cc0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f221de40592f4690b0a467e19ac952729d2f055f5a5b6454b1e31bc83ff6cc0e", kill_on_drop: false }`
[INFO] [stdout] f221de40592f4690b0a467e19ac952729d2f055f5a5b6454b1e31bc83ff6cc0e