[INFO] fetching crate simple_ringbuf 0.1.2...
[INFO] checking simple_ringbuf-0.1.2 against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] extracting crate simple_ringbuf 0.1.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate simple_ringbuf 0.1.2 on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple_ringbuf 0.1.2
[INFO] finished tweaking crates.io crate simple_ringbuf 0.1.2
[INFO] tweaked toml for crates.io crate simple_ringbuf 0.1.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "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" "+fc81ad22c453776de16acf9938976930cf8c9401" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9bb8096d98105bbdc3bcfa15f3dfb0c6fe1ef3147967b33644ab750bb858958
[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" "b9bb8096d98105bbdc3bcfa15f3dfb0c6fe1ef3147967b33644ab750bb858958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9bb8096d98105bbdc3bcfa15f3dfb0c6fe1ef3147967b33644ab750bb858958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9bb8096d98105bbdc3bcfa15f3dfb0c6fe1ef3147967b33644ab750bb858958", kill_on_drop: false }`
[INFO] [stdout] b9bb8096d98105bbdc3bcfa15f3dfb0c6fe1ef3147967b33644ab750bb858958
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "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] 57a87f76b51078404982c9db64d65589bad51049ed0d3d6ad2461d6f7ad73560
[INFO] running `Command { std: "docker" "start" "-a" "57a87f76b51078404982c9db64d65589bad51049ed0d3d6ad2461d6f7ad73560", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking simple_ringbuf v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/impls.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 | /             format!(
[INFO] [stdout] 132 | |                 "Attempt to access index {} larger than current length {}",
[INFO] [stdout] 133 | |                 idx, self.len
[INFO] [stdout] 134 | |             )
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 131 |             
[INFO] [stdout] 132 |                 "Attempt to access index {} larger than current length {}",
[INFO] [stdout] 133 |                 idx, self.len
[INFO] [stdout] 134 |             
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_test v1.0.126
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> tests/tests.rs:140:6
[INFO] [stdout]     |
[INFO] [stdout] 140 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/impls.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 | /             format!(
[INFO] [stdout] 132 | |                 "Attempt to access index {} larger than current length {}",
[INFO] [stdout] 133 | |                 idx, self.len
[INFO] [stdout] 134 | |             )
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 131 |             
[INFO] [stdout] 132 |                 "Attempt to access index {} larger than current length {}",
[INFO] [stdout] 133 |                 idx, self.len
[INFO] [stdout] 134 |             
[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 9.23s
[INFO] running `Command { std: "docker" "inspect" "57a87f76b51078404982c9db64d65589bad51049ed0d3d6ad2461d6f7ad73560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57a87f76b51078404982c9db64d65589bad51049ed0d3d6ad2461d6f7ad73560", kill_on_drop: false }`
[INFO] [stdout] 57a87f76b51078404982c9db64d65589bad51049ed0d3d6ad2461d6f7ad73560