[INFO] cloning repository https://github.com/TwistingTwists/sample-hello
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TwistingTwists/sample-hello" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTwistingTwists%2Fsample-hello", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTwistingTwists%2Fsample-hello'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca67c992c7252dcc40e949ae20349707f8cdcac7
[INFO] checking TwistingTwists/sample-hello against master#40daf23eeb711dadf140b2536e67e3ff4c999196 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTwistingTwists%2Fsample-hello" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TwistingTwists/sample-hello on toolchain 40daf23eeb711dadf140b2536e67e3ff4c999196
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/TwistingTwists/sample-hello
[INFO] finished tweaking git repo https://github.com/TwistingTwists/sample-hello
[INFO] tweaked toml for git repo https://github.com/TwistingTwists/sample-hello written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/TwistingTwists/sample-hello 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" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ic-stable-memory-derive v0.4.2
[INFO] [stderr]   Downloaded zwohash v0.1.2
[INFO] [stderr]   Downloaded candid v0.10.7
[INFO] [stderr]   Downloaded ic-stable-structures v0.6.4
[INFO] [stderr]   Downloaded ic-stable-memory v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6717ff9c951d35e51153431bc841b3b76d6a99328f949963ed26d2cbe7cd2273
[INFO] running `Command { std: "docker" "start" "-a" "6717ff9c951d35e51153431bc841b3b76d6a99328f949963ed26d2cbe7cd2273", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6717ff9c951d35e51153431bc841b3b76d6a99328f949963ed26d2cbe7cd2273", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6717ff9c951d35e51153431bc841b3b76d6a99328f949963ed26d2cbe7cd2273", kill_on_drop: false }`
[INFO] [stdout] 6717ff9c951d35e51153431bc841b3b76d6a99328f949963ed26d2cbe7cd2273
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c86732964bc0c89cf575e06e2f18e0456e37bcfb92ff6e534c153c6a3c8b4d9
[INFO] running `Command { std: "docker" "start" "-a" "2c86732964bc0c89cf575e06e2f18e0456e37bcfb92ff6e534c153c6a3c8b4d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling serde v1.0.200
[INFO] [stderr]    Compiling either v1.11.0
[INFO] [stderr]    Compiling syn v2.0.60
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.59
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling rustversion v1.0.15
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling anyhow v1.0.82
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cc v1.0.96
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling parking_lot v0.12.2
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling cpufeatures v0.2.12
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.6
[INFO] [stderr]    Compiling unicode-width v0.1.12
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling petgraph v0.6.4
[INFO] [stderr]    Compiling ena v0.14.2
[INFO] [stderr]    Compiling string_cache v0.8.7
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling lalrpop-util v0.19.12
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling is-terminal v0.4.12
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling beef v0.5.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling data-encoding v2.6.0
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling leb128 v0.2.5
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling pretty v0.10.0
[INFO] [stderr]    Compiling codespan-reporting v0.11.1
[INFO] [stderr]    Compiling lalrpop v0.19.12
[INFO] [stderr]    Compiling pretty v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.200
[INFO] [stderr]    Compiling thiserror-impl v1.0.59
[INFO] [stderr]    Compiling candid_derive v0.6.6
[INFO] [stderr]    Compiling serde_json v1.0.116
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]     Checking ic0 v0.18.11
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking zwohash v0.1.2
[INFO] [stderr]     Checking ic0 v0.21.1
[INFO] [stderr]    Compiling binread_derive v2.1.0
[INFO] [stderr]    Compiling logos-derive v0.12.1
[INFO] [stderr]    Compiling candid_derive v0.5.0
[INFO] [stderr]    Compiling ic-stable-memory-derive v0.4.2
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]    Compiling num_enum v0.5.11
[INFO] [stderr]    Compiling binread v2.2.0
[INFO] [stderr]    Compiling logos v0.12.1
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking ic_principal v0.1.1
[INFO] [stderr]     Checking ic-stable-structures v0.6.4
[INFO] [stderr]    Compiling serde_tokenstream v0.1.7
[INFO] [stderr]     Checking candid v0.10.7
[INFO] [stderr]    Compiling candid v0.8.4
[INFO] [stderr]    Compiling ic-cdk-macros v0.13.2
[INFO] [stderr]     Checking ic-cdk v0.13.2
[INFO] [stderr]    Compiling ic-cdk-macros v0.6.10
[INFO] [stderr]     Checking ic-cdk v0.7.4
[INFO] [stderr]     Checking ic-stable-memory v0.4.4
[INFO] [stderr]     Checking hello_backend v0.1.0 (/opt/rustwide/workdir/src/hello_backend)
[INFO] [stdout] warning: unused import: `ic_cdk::println`
[INFO] [stdout]    --> src/hello_backend/src/lib.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     use ic_cdk::println;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/hello_backend/src/lib.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn to_bytes(&self) -> std::borrow::Cow<[u8]> {
[INFO] [stdout]    |                 ^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn to_bytes(&self) -> std::borrow::Cow<'_, [u8]> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/hello_backend/src/lib.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn to_bytes(&self) -> std::borrow::Cow<[u8]> {
[INFO] [stdout]    |                 ^^^^^     ---------------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn to_bytes(&self) -> std::borrow::Cow<'_, [u8]> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 36s
[INFO] running `Command { std: "docker" "inspect" "2c86732964bc0c89cf575e06e2f18e0456e37bcfb92ff6e534c153c6a3c8b4d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c86732964bc0c89cf575e06e2f18e0456e37bcfb92ff6e534c153c6a3c8b4d9", kill_on_drop: false }`
[INFO] [stdout] 2c86732964bc0c89cf575e06e2f18e0456e37bcfb92ff6e534c153c6a3c8b4d9