[INFO] fetching crate zerogc-derive 0.2.0-alpha.6...
[INFO] testing zerogc-derive-0.2.0-alpha.6 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate zerogc-derive 0.2.0-alpha.6 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate zerogc-derive 0.2.0-alpha.6
[INFO] finished tweaking crates.io crate zerogc-derive 0.2.0-alpha.6
[INFO] tweaked toml for crates.io crate zerogc-derive 0.2.0-alpha.6 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate zerogc-derive 0.2.0-alpha.6 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.13.4 (available: v0.23.0)
[INFO] [stderr]       Adding indexmap v1.9.3 (available: v2.14.0)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] [stderr]       Adding proc-macro-kwargs v0.1.5 (available: v0.2.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.117)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-kwargs-derive v0.1.5
[INFO] [stderr]   Downloaded proc-macro-kwargs v0.1.5
[INFO] [stderr]   Downloaded inherent v1.0.13
[INFO] [stderr]   Downloaded zerogc-derive v0.2.0-alpha.6
[INFO] [stderr]   Downloaded zerogc v0.2.0-alpha.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2b072c482a213e4befacb85f22bbbacf4c3dbfc1d992d09db0ee40860e0ff270
[INFO] running `Command { std: "docker" "start" "-a" "2b072c482a213e4befacb85f22bbbacf4c3dbfc1d992d09db0ee40860e0ff270", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b072c482a213e4befacb85f22bbbacf4c3dbfc1d992d09db0ee40860e0ff270", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b072c482a213e4befacb85f22bbbacf4c3dbfc1d992d09db0ee40860e0ff270", kill_on_drop: false }`
[INFO] [stdout] 2b072c482a213e4befacb85f22bbbacf4c3dbfc1d992d09db0ee40860e0ff270
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 0183fd4d7387d50098d704f2345ca013e94cb320f9232e13223a43a349c9136e
[INFO] running `Command { std: "docker" "start" "-a" "0183fd4d7387d50098d704f2345ca013e94cb320f9232e13223a43a349c9136e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling proc-macro-kwargs-derive v0.1.5
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling proc-macro-kwargs v0.1.5
[INFO] [stderr]    Compiling zerogc-derive v0.2.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: cannot find `tracked_env` in `proc_macro`
[INFO] [stdout]    --> src/lib.rs:250:25
[INFO] [stdout]     |
[INFO] [stdout] 250 |     match ::proc_macro::tracked_env::var("DEBUG_DERIVE") {
[INFO] [stdout]     |                         ^^^^^^^^^^^ could not find `tracked_env` in `proc_macro`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `source_file` found for struct `proc_macro::Span` in the current scope
[INFO] [stdout]    --> src/lib.rs:237:23
[INFO] [stdout]     |
[INFO] [stdout] 237 |     let sf = internal.source_file();
[INFO] [stdout]     |                       ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `source` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 237 -     let sf = internal.source_file();
[INFO] [stdout] 237 +     let sf = internal.source();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `line` on type `proc_macro::Span`
[INFO] [stdout]    --> src/lib.rs:243:35
[INFO] [stdout]     |
[INFO] [stdout] 243 |     let lineno = internal.start().line;
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 243 |     let lineno = internal.start().line();
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599, E0615.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerogc-derive` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "0183fd4d7387d50098d704f2345ca013e94cb320f9232e13223a43a349c9136e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0183fd4d7387d50098d704f2345ca013e94cb320f9232e13223a43a349c9136e", kill_on_drop: false }`
[INFO] [stdout] 0183fd4d7387d50098d704f2345ca013e94cb320f9232e13223a43a349c9136e