[INFO] fetching crate rtest-derive 0.2.0...
[INFO] building rtest-derive-0.2.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate rtest-derive 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rtest-derive 0.2.0
[INFO] finished tweaking crates.io crate rtest-derive 0.2.0
[INFO] tweaked toml for crates.io crate rtest-derive 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rtest-derive 0.2.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.20.11 (available: v0.21.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rtest-util v0.2.0
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7307952457d1906b042d1626ed4a68a0f4419e905d09f495b27767596728ae6
[INFO] running `Command { std: "docker" "start" "-a" "b7307952457d1906b042d1626ed4a68a0f4419e905d09f495b27767596728ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7307952457d1906b042d1626ed4a68a0f4419e905d09f495b27767596728ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7307952457d1906b042d1626ed4a68a0f4419e905d09f495b27767596728ae6", kill_on_drop: false }`
[INFO] [stdout] b7307952457d1906b042d1626ed4a68a0f4419e905d09f495b27767596728ae6
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f898de07ea6a1b93658935cdf0f6d8635dc0f68a99529e4a5d3be32f326ea28f
[INFO] running `Command { std: "docker" "start" "-a" "f898de07ea6a1b93658935cdf0f6d8635dc0f68a99529e4a5d3be32f326ea28f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling darling v0.20.11
[INFO] [stderr]    Compiling rtest-util v0.2.0
[INFO] [stdout] error[E0433]: failed to resolve: could not find `syn` in the list of imported crates
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rtest-util-0.2.0/src/lib.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub module:      Option<String>,
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^ could not find `syn` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `syn` in the list of imported crates
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rtest-util-0.2.0/src/lib.rs:13:22
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub group:       Option<String>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^ could not find `syn` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `syn` in the list of imported crates
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rtest-util-0.2.0/src/lib.rs:15:22
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub cost:        Option<u32>,
[INFO] [stdout]    |                      ^^^^^^^^^^^ could not find `syn` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `syn` in the list of imported crates
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rtest-util-0.2.0/src/lib.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub responsible: Option<String>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^ could not find `syn` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `syn` in the list of imported crates
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rtest-util-0.2.0/src/lib.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub optional:    bool,
[INFO] [stdout]    |                      ^^^^ could not find `syn` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtest-util` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "f898de07ea6a1b93658935cdf0f6d8635dc0f68a99529e4a5d3be32f326ea28f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f898de07ea6a1b93658935cdf0f6d8635dc0f68a99529e4a5d3be32f326ea28f", kill_on_drop: false }`
[INFO] [stdout] f898de07ea6a1b93658935cdf0f6d8635dc0f68a99529e4a5d3be32f326ea28f