[INFO] fetching crate err_mac 0.1.0...
[INFO] checking err_mac-0.1.0 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate err_mac 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate err_mac 0.1.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate err_mac 0.1.0
[INFO] tweaked toml for crates.io crate err_mac 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate err_mac 0.1.0 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate err_mac 0.1.0 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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2e23cc33e47601eaac7aecbdb2b09eecfd406fdd4e870837bc07b548fcc398a
[INFO] running `Command { std: "docker" "start" "-a" "e2e23cc33e47601eaac7aecbdb2b09eecfd406fdd4e870837bc07b548fcc398a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2e23cc33e47601eaac7aecbdb2b09eecfd406fdd4e870837bc07b548fcc398a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2e23cc33e47601eaac7aecbdb2b09eecfd406fdd4e870837bc07b548fcc398a", kill_on_drop: false }`
[INFO] [stdout] e2e23cc33e47601eaac7aecbdb2b09eecfd406fdd4e870837bc07b548fcc398a
[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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ed403e564e215b582f70bbce2c35dc85003531a31a36396f2f39af75b9d5ec6
[INFO] running `Command { std: "docker" "start" "-a" "6ed403e564e215b582f70bbce2c35dc85003531a31a36396f2f39af75b9d5ec6", kill_on_drop: false }`
[INFO] [stderr]     Checking err_mac v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `MarketErr` is never constructed
[INFO] [stdout]  --> tests/derive_test.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct MarketErr;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConvertErr` is never constructed
[INFO] [stdout]  --> tests/derive_test.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct ConvertErr;
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EthRpcErr` is never constructed
[INFO] [stdout]  --> tests/derive_test.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct EthRpcErr;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `field` and `message` are never read
[INFO] [stdout]  --> examples/usage.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct ValidationError {
[INFO] [stdout]   |        --------------- fields in this struct
[INFO] [stdout] 7 |     field: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     message: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ValidationError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `code` and `message` are never read
[INFO] [stdout]   --> examples/usage.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct DatabaseError {
[INFO] [stdout]    |        ------------- fields in this struct
[INFO] [stdout] 13 |     code: i32,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     message: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DatabaseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "6ed403e564e215b582f70bbce2c35dc85003531a31a36396f2f39af75b9d5ec6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ed403e564e215b582f70bbce2c35dc85003531a31a36396f2f39af75b9d5ec6", kill_on_drop: false }`
[INFO] [stdout] 6ed403e564e215b582f70bbce2c35dc85003531a31a36396f2f39af75b9d5ec6