[INFO] fetching crate struct_layout 0.1.0...
[INFO] checking struct_layout-0.1.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate struct_layout 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate struct_layout 0.1.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7428815ac2a97fe19ef845148801ac4ec477c87e661555504e9cdd893b664cc9
[INFO] running `Command { std: "docker" "start" "-a" "7428815ac2a97fe19ef845148801ac4ec477c87e661555504e9cdd893b664cc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7428815ac2a97fe19ef845148801ac4ec477c87e661555504e9cdd893b664cc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7428815ac2a97fe19ef845148801ac4ec477c87e661555504e9cdd893b664cc9", kill_on_drop: false }`
[INFO] [stdout] 7428815ac2a97fe19ef845148801ac4ec477c87e661555504e9cdd893b664cc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9a530c754875964721bee3b1951fe53f2be33eeac4656d57721e14a4b6c5bf95
[INFO] running `Command { std: "docker" "start" "-a" "9a530c754875964721bee3b1951fe53f2be33eeac4656d57721e14a4b6c5bf95", kill_on_drop: false }`
[INFO] [stderr]     Checking 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: 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "9a530c754875964721bee3b1951fe53f2be33eeac4656d57721e14a4b6c5bf95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a530c754875964721bee3b1951fe53f2be33eeac4656d57721e14a4b6c5bf95", kill_on_drop: false }`
[INFO] [stdout] 9a530c754875964721bee3b1951fe53f2be33eeac4656d57721e14a4b6c5bf95