[INFO] fetching crate deltastruct 0.1.8...
[INFO] checking deltastruct-0.1.8 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate deltastruct 0.1.8 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate deltastruct 0.1.8
[INFO] finished tweaking crates.io crate deltastruct 0.1.8
[INFO] tweaked toml for crates.io crate deltastruct 0.1.8 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate deltastruct 0.1.8 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded deltastruct_proc v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52c926662c68365891c48f0b1c064929e4cc56bd16343117a8cae7f5a4bf44f7
[INFO] running `Command { std: "docker" "start" "-a" "52c926662c68365891c48f0b1c064929e4cc56bd16343117a8cae7f5a4bf44f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52c926662c68365891c48f0b1c064929e4cc56bd16343117a8cae7f5a4bf44f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52c926662c68365891c48f0b1c064929e4cc56bd16343117a8cae7f5a4bf44f7", kill_on_drop: false }`
[INFO] [stdout] 52c926662c68365891c48f0b1c064929e4cc56bd16343117a8cae7f5a4bf44f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e602b807d50cc0bb6737705afa4570dec6e3500e47b30942c424b14ba2258166
[INFO] running `Command { std: "docker" "start" "-a" "e602b807d50cc0bb6737705afa4570dec6e3500e47b30942c424b14ba2258166", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling deltastruct_proc v0.1.8
[INFO] [stderr]     Checking deltastruct v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Testbug` is never constructed
[INFO] [stdout]    --> src/lib.rs:243:14
[INFO] [stdout]     |
[INFO] [stdout] 243 |       struct Testbug {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `bar` is never used
[INFO] [stdout]    --> src/lib.rs:248:12
[INFO] [stdout]     |
[INFO] [stdout] 247 |       impl Testbug {
[INFO] [stdout]     |       ------------ method in this implementation
[INFO] [stdout] 248 |         fn bar(&mut self) {}
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `clone` that must be used
[INFO] [stdout]    --> src/lib.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     testbugdelta.clone();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cloning is often expensive and is not expected to have side effects
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 253 |     let _ = testbugdelta.clone();
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.72s
[INFO] running `Command { std: "docker" "inspect" "e602b807d50cc0bb6737705afa4570dec6e3500e47b30942c424b14ba2258166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e602b807d50cc0bb6737705afa4570dec6e3500e47b30942c424b14ba2258166", kill_on_drop: false }`
[INFO] [stdout] e602b807d50cc0bb6737705afa4570dec6e3500e47b30942c424b14ba2258166