[INFO] fetching crate struct_layout 0.1.0...
[INFO] testing struct_layout-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate struct_layout 0.1.0 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate struct_layout 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate struct_layout 0.1.0
[INFO] finished tweaking crates.io crate struct_layout 0.1.0
[INFO] tweaked toml for crates.io crate struct_layout 0.1.0 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5934a8d896c6ba4911d3cff11636dc1565bb24fb762b8e21680fa441fffe97c6
[INFO] running `Command { std: "docker" "start" "-a" "5934a8d896c6ba4911d3cff11636dc1565bb24fb762b8e21680fa441fffe97c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5934a8d896c6ba4911d3cff11636dc1565bb24fb762b8e21680fa441fffe97c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5934a8d896c6ba4911d3cff11636dc1565bb24fb762b8e21680fa441fffe97c6", kill_on_drop: false }`
[INFO] [stdout] 5934a8d896c6ba4911d3cff11636dc1565bb24fb762b8e21680fa441fffe97c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bb41e0954f67471f043adc951dfee78b9de76af46411fab714d287de7dee6c6
[INFO] running `Command { std: "docker" "start" "-a" "6bb41e0954f67471f043adc951dfee78b9de76af46411fab714d287de7dee6c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling struct_layout v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/lib.rs:514:84
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                                                                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("{}", "parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "6bb41e0954f67471f043adc951dfee78b9de76af46411fab714d287de7dee6c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bb41e0954f67471f043adc951dfee78b9de76af46411fab714d287de7dee6c6", kill_on_drop: false }`
[INFO] [stdout] 6bb41e0954f67471f043adc951dfee78b9de76af46411fab714d287de7dee6c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8fed25508cb0b79595997577444a8ef519b3a59280e880ee7108d3f58d9f683
[INFO] running `Command { std: "docker" "start" "-a" "f8fed25508cb0b79595997577444a8ef519b3a59280e880ee7108d3f58d9f683", kill_on_drop: false }`
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/lib.rs:514:84
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                                                                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("{}", "parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling struct_layout v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/lib.rs:514:84
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                                                                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 514 |         None => panic!("{}", "parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stdout]     |                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "f8fed25508cb0b79595997577444a8ef519b3a59280e880ee7108d3f58d9f683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8fed25508cb0b79595997577444a8ef519b3a59280e880ee7108d3f58d9f683", kill_on_drop: false }`
[INFO] [stdout] f8fed25508cb0b79595997577444a8ef519b3a59280e880ee7108d3f58d9f683
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 10bae1608b92a00011c6214e5f2a0d39054568aa86636495f2752d6767a38dd4
[INFO] running `Command { std: "docker" "start" "-a" "10bae1608b92a00011c6214e5f2a0d39054568aa86636495f2752d6767a38dd4", kill_on_drop: false }`
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]    --> src/lib.rs:514:84
[INFO] [stderr]     |
[INFO] [stderr] 514 |         None => panic!("parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stderr]     |                                                                                          ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]     |
[INFO] [stderr] 514 |         None => panic!("{}", "parse struct: tuple syntax not supported, struct layout requires {{}} to declare the fields"),
[INFO] [stderr]     |                        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `struct_layout` (lib) generated 1 warning
[INFO] [stderr] warning: `struct_layout` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/struct_layout-e52db238a20a9d96)
[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] [stderr]    Doc-tests struct_layout
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test src/lib.rs - compile_fail (line 815) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 808) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 862) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 856) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 801) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 834) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 824) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - compile_fail (line 844) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - (line 49) ... ok
[INFO] [stdout] test src/lib.rs - (line 64) ... ok
[INFO] [stdout] test src/lib.rs - (line 8) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.30s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "10bae1608b92a00011c6214e5f2a0d39054568aa86636495f2752d6767a38dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10bae1608b92a00011c6214e5f2a0d39054568aa86636495f2752d6767a38dd4", kill_on_drop: false }`
[INFO] [stdout] 10bae1608b92a00011c6214e5f2a0d39054568aa86636495f2752d6767a38dd4