[INFO] fetching crate koto_runtime 0.6.0...
[INFO] checking koto_runtime-0.6.0 against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] extracting crate koto_runtime 0.6.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate koto_runtime 0.6.0 on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate koto_runtime 0.6.0
[INFO] finished tweaking crates.io crate koto_runtime 0.6.0
[INFO] tweaked toml for crates.io crate koto_runtime 0.6.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9539c33872a1502380c0ac517c0767e83dabbbf4f4cecd7596b55d88556cd1bf
[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" "9539c33872a1502380c0ac517c0767e83dabbbf4f4cecd7596b55d88556cd1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9539c33872a1502380c0ac517c0767e83dabbbf4f4cecd7596b55d88556cd1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9539c33872a1502380c0ac517c0767e83dabbbf4f4cecd7596b55d88556cd1bf", kill_on_drop: false }`
[INFO] [stdout] 9539c33872a1502380c0ac517c0767e83dabbbf4f4cecd7596b55d88556cd1bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0d4926b0747bbaa13b76cb5c31df5f4f76aec46b88a993bdd65188b601345b3
[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" "e0d4926b0747bbaa13b76cb5c31df5f4f76aec46b88a993bdd65188b601345b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking koto_lexer v0.6.0
[INFO] [stderr]     Checking koto_parser v0.6.0
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking koto_bytecode v0.6.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking koto_runtime v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/vm.rs:2124:10
[INFO] [stdout]      |
[INFO] [stdout] 2124 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/vm.rs:2124:10
[INFO] [stdout]      |
[INFO] [stdout] 2124 |         };
[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/core/string/format.rs:299:38
[INFO] [stdout]     |
[INFO] [stdout] 299 |                 Err(error) => panic!(error),
[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] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 299 |                 Err(error) => panic!("{}", error),
[INFO] [stdout]     |                                      ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 299 |                 Err(error) => std::panic::panic_any(error),
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/value.rs:187:30
[INFO] [stdout]     |
[INFO] [stdout] 187 |             (a, b) => panic!(format!("partial_cmp unsupported for {} and {}", a, b)),
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() 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] 187 |             (a, b) => panic!("partial_cmp unsupported for {} and {}", a, b),
[INFO] [stdout]     |                             --                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/value.rs:202:30
[INFO] [stdout]     |
[INFO] [stdout] 202 |             (a, b) => panic!(format!("cmp unsupported for {} and {}", a, b)),
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() 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] 202 |             (a, b) => panic!("cmp unsupported for {} and {}", a, b),
[INFO] [stdout]     |                             --                                   --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/value.rs:187:30
[INFO] [stdout]     |
[INFO] [stdout] 187 |             (a, b) => panic!(format!("partial_cmp unsupported for {} and {}", a, b)),
[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 panic!() 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] 187 |             (a, b) => panic!("partial_cmp unsupported for {} and {}", a, b),
[INFO] [stdout]     |                             --                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/value.rs:202:30
[INFO] [stdout]     |
[INFO] [stdout] 202 |             (a, b) => panic!(format!("cmp unsupported for {} and {}", a, b)),
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() 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] 202 |             (a, b) => panic!("cmp unsupported for {} and {}", a, b),
[INFO] [stdout]     |                             --                                   --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/vm_tests.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 panic!(format!("Error while running script: {}", e.to_string()));
[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 panic!() 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] 64 |                 panic!("Error while running script: {}", e.to_string());
[INFO] [stdout]    |                       --                                             --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.73s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e0d4926b0747bbaa13b76cb5c31df5f4f76aec46b88a993bdd65188b601345b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0d4926b0747bbaa13b76cb5c31df5f4f76aec46b88a993bdd65188b601345b3", kill_on_drop: false }`
[INFO] [stdout] e0d4926b0747bbaa13b76cb5c31df5f4f76aec46b88a993bdd65188b601345b3