[INFO] fetching crate simple_encode 0.1.0...
[INFO] checking simple_encode-0.1.0 against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] extracting crate simple_encode 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate simple_encode 0.1.0 on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple_encode 0.1.0
[INFO] finished tweaking crates.io crate simple_encode 0.1.0
[INFO] tweaked toml for crates.io crate simple_encode 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "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] 01af6af0b600b5b5265aba596378baa9baf750b0ad115d4b71741a94b05c3e43
[INFO] running `Command { std: "docker" "start" "-a" "01af6af0b600b5b5265aba596378baa9baf750b0ad115d4b71741a94b05c3e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01af6af0b600b5b5265aba596378baa9baf750b0ad115d4b71741a94b05c3e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01af6af0b600b5b5265aba596378baa9baf750b0ad115d4b71741a94b05c3e43", kill_on_drop: false }`
[INFO] [stdout] 01af6af0b600b5b5265aba596378baa9baf750b0ad115d4b71741a94b05c3e43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8cbe2e42762f660830bc7ead1263a7b0a7007b2efeae0b1c5aeabd34180f7df4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8cbe2e42762f660830bc7ead1263a7b0a7007b2efeae0b1c5aeabd34180f7df4", kill_on_drop: false }`
[INFO] [stderr]     Checking simple_encode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/lib.rs:26:33
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("Too large: {}\t- Must be <= 15.")
[INFO] [stdout]    |                                 ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(panic_fmt)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in a future Rust edition
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("Too large: {}\t- Must be <= 15.", ...)
[INFO] [stdout]    |                                                      ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("{}", "Too large: {}\t- Must be <= 15.")
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/lib.rs:26:33
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("Too large: {}\t- Must be <= 15.")
[INFO] [stdout]    |                                 ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(panic_fmt)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in a future Rust edition
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("Too large: {}\t- Must be <= 15.", ...)
[INFO] [stdout]    |                                                      ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 26 |         _ => panic!("{}", "Too large: {}\t- Must be <= 15.")
[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 0.16s
[INFO] running `Command { std: "docker" "inspect" "8cbe2e42762f660830bc7ead1263a7b0a7007b2efeae0b1c5aeabd34180f7df4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cbe2e42762f660830bc7ead1263a7b0a7007b2efeae0b1c5aeabd34180f7df4", kill_on_drop: false }`
[INFO] [stdout] 8cbe2e42762f660830bc7ead1263a7b0a7007b2efeae0b1c5aeabd34180f7df4