[INFO] cloning repository https://github.com/yutaro-sakamoto/kani-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yutaro-sakamoto/kani-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyutaro-sakamoto%2Fkani-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyutaro-sakamoto%2Fkani-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb39e56b6fffb638878130f7dc0a573c265251a2
[INFO] checking yutaro-sakamoto/kani-playground against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyutaro-sakamoto%2Fkani-playground" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yutaro-sakamoto/kani-playground
[INFO] finished tweaking git repo https://github.com/yutaro-sakamoto/kani-playground
[INFO] tweaked toml for git repo https://github.com/yutaro-sakamoto/kani-playground written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yutaro-sakamoto/kani-playground on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yutaro-sakamoto/kani-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba9f297259fdfc2f7cc51719ef55cab2098c80024067b4d80d50dfe0494be7d5
[INFO] running `Command { std: "docker" "start" "-a" "ba9f297259fdfc2f7cc51719ef55cab2098c80024067b4d80d50dfe0494be7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba9f297259fdfc2f7cc51719ef55cab2098c80024067b4d80d50dfe0494be7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba9f297259fdfc2f7cc51719ef55cab2098c80024067b4d80d50dfe0494be7d5", kill_on_drop: false }`
[INFO] [stdout] ba9f297259fdfc2f7cc51719ef55cab2098c80024067b4d80d50dfe0494be7d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 485bdcc33c15e1502b5c5e56284b1729867bb2464f5e725f6fedd144c103a4d2
[INFO] running `Command { std: "docker" "start" "-a" "485bdcc33c15e1502b5c5e56284b1729867bb2464f5e725f6fedd144c103a4d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling contracts v0.4.0
[INFO] [stderr]     Checking vector-map v1.0.1
[INFO] [stderr]     Checking kani-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `kani`
[INFO] [stdout]    --> src/main.rs:110:7
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[cfg(kani)]
[INFO] [stdout]     |       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(kani)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(kani)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `kani`
[INFO] [stdout]    --> src/main.rs:110:7
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[cfg(kani)]
[INFO] [stdout]     |       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(kani)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(kani)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `estimate_size` is never used
[INFO] [stdout]  --> src/main.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn estimate_size(x: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_wrapped` is never used
[INFO] [stdout]   --> src/main.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn get_wrapped(i: usize, a: &[u32]) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `estimate_size` is never used
[INFO] [stdout]  --> src/main.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn estimate_size(x: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_wrapped` is never used
[INFO] [stdout]   --> src/main.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn get_wrapped(i: usize, a: &[u32]) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_addition` is never used
[INFO] [stdout]   --> src/main.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn simple_addition(a: u32, b: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_addition` is never used
[INFO] [stdout]   --> src/main.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn simple_addition(a: u32, b: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_midpoint` is never used
[INFO] [stdout]   --> src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn find_midpoint(low: u32, high: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_midpoint` is never used
[INFO] [stdout]   --> src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn find_midpoint(low: u32, high: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `initialize_prefix` is never used
[INFO] [stdout]   --> src/main.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn initialize_prefix(length: usize, buffer: &mut [u8]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `initialize_prefix` is never used
[INFO] [stdout]   --> src/main.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn initialize_prefix(length: usize, buffer: &mut [u8]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.97s
[INFO] running `Command { std: "docker" "inspect" "485bdcc33c15e1502b5c5e56284b1729867bb2464f5e725f6fedd144c103a4d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "485bdcc33c15e1502b5c5e56284b1729867bb2464f5e725f6fedd144c103a4d2", kill_on_drop: false }`
[INFO] [stdout] 485bdcc33c15e1502b5c5e56284b1729867bb2464f5e725f6fedd144c103a4d2
