[INFO] fetching crate cow_struct 0.0.1...
[INFO] testing cow_struct-0.0.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate cow_struct 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate cow_struct 0.0.1
[INFO] finished tweaking crates.io crate cow_struct 0.0.1
[INFO] tweaked toml for crates.io crate cow_struct 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cow_struct 0.0.1 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8964a1ee3ae702fc878379b8577f0d23f0fa84acdb5a1a884baf4e3afa8b1061
[INFO] running `Command { std: "docker" "start" "-a" "8964a1ee3ae702fc878379b8577f0d23f0fa84acdb5a1a884baf4e3afa8b1061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8964a1ee3ae702fc878379b8577f0d23f0fa84acdb5a1a884baf4e3afa8b1061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8964a1ee3ae702fc878379b8577f0d23f0fa84acdb5a1a884baf4e3afa8b1061", kill_on_drop: false }`
[INFO] [stdout] 8964a1ee3ae702fc878379b8577f0d23f0fa84acdb5a1a884baf4e3afa8b1061
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d32b4fc0b3282801bf750240e12149ff0cd97f31097402e77841552237f699e7
[INFO] running `Command { std: "docker" "start" "-a" "d32b4fc0b3282801bf750240e12149ff0cd97f31097402e77841552237f699e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cow_struct v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.82s
[INFO] running `Command { std: "docker" "inspect" "d32b4fc0b3282801bf750240e12149ff0cd97f31097402e77841552237f699e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d32b4fc0b3282801bf750240e12149ff0cd97f31097402e77841552237f699e7", kill_on_drop: false }`
[INFO] [stdout] d32b4fc0b3282801bf750240e12149ff0cd97f31097402e77841552237f699e7
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79b01b5bcde1a77da62fa27f152de53f584f9a55df64d4e6d8bac135f5b3bc04
[INFO] running `Command { std: "docker" "start" "-a" "79b01b5bcde1a77da62fa27f152de53f584f9a55df64d4e6d8bac135f5b3bc04", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cow_struct v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `f` is never read
[INFO] [stdout]  --> tests/struct.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     struct Nested {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |         f: [u8; 16],
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Nested` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.31s
[INFO] running `Command { std: "docker" "inspect" "79b01b5bcde1a77da62fa27f152de53f584f9a55df64d4e6d8bac135f5b3bc04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b01b5bcde1a77da62fa27f152de53f584f9a55df64d4e6d8bac135f5b3bc04", kill_on_drop: false }`
[INFO] [stdout] 79b01b5bcde1a77da62fa27f152de53f584f9a55df64d4e6d8bac135f5b3bc04
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8c19646df2008e5dff5987228ce04a22779eb6d9948062fb7eee82c0b67a0002
[INFO] running `Command { std: "docker" "start" "-a" "8c19646df2008e5dff5987228ce04a22779eb6d9948062fb7eee82c0b67a0002", kill_on_drop: false }`
[INFO] [stderr] warning: field `f` is never read
[INFO] [stderr]  --> tests/struct.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     struct Nested {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] 6 |         f: [u8; 16],
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Nested` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cow_struct` (test "struct") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stderr]      Running tests/struct.rs (/opt/rustwide/target/debug/deps/struct-96d8251e48a98380)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cow_struct
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::derive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8c19646df2008e5dff5987228ce04a22779eb6d9948062fb7eee82c0b67a0002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c19646df2008e5dff5987228ce04a22779eb6d9948062fb7eee82c0b67a0002", kill_on_drop: false }`
[INFO] [stdout] 8c19646df2008e5dff5987228ce04a22779eb6d9948062fb7eee82c0b67a0002