[INFO] cloning repository https://github.com/HuaGu-Dragon/learn_unsafe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HuaGu-Dragon/learn_unsafe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHuaGu-Dragon%2Flearn_unsafe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHuaGu-Dragon%2Flearn_unsafe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1cd644a471859c2439a16eac76b64d26c32b7a1f
[INFO] checking HuaGu-Dragon/learn_unsafe against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHuaGu-Dragon%2Flearn_unsafe" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/HuaGu-Dragon/learn_unsafe
[INFO] finished tweaking git repo https://github.com/HuaGu-Dragon/learn_unsafe
[INFO] tweaked toml for git repo https://github.com/HuaGu-Dragon/learn_unsafe written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/HuaGu-Dragon/learn_unsafe on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/HuaGu-Dragon/learn_unsafe 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16ff12183ac89d39b15fbee1a0f1ab44f76f9cc5c7782dada2e2e323ffded2ab
[INFO] running `Command { std: "docker" "start" "-a" "16ff12183ac89d39b15fbee1a0f1ab44f76f9cc5c7782dada2e2e323ffded2ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16ff12183ac89d39b15fbee1a0f1ab44f76f9cc5c7782dada2e2e323ffded2ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16ff12183ac89d39b15fbee1a0f1ab44f76f9cc5c7782dada2e2e323ffded2ab", kill_on_drop: false }`
[INFO] [stdout] 16ff12183ac89d39b15fbee1a0f1ab44f76f9cc5c7782dada2e2e323ffded2ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd66b72079feffad338e904d8c128565cf270958dbe7b03359844a855de98c5e
[INFO] running `Command { std: "docker" "start" "-a" "bd66b72079feffad338e904d8c128565cf270958dbe7b03359844a855de98c5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking slab v0.4.11
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking atomic-wait v1.1.0
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking learn_unsafe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Epoll` is never constructed
[INFO] [stdout]   --> src/epoll/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct Epoll {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `StrSplit` is never constructed
[INFO] [stdout]  --> src/safe/iter.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct StrSplit<'haystack, D> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_unsafe` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Epoll` is never constructed
[INFO] [stdout]   --> src/epoll/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct Epoll {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_unsafe` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "bd66b72079feffad338e904d8c128565cf270958dbe7b03359844a855de98c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd66b72079feffad338e904d8c128565cf270958dbe7b03359844a855de98c5e", kill_on_drop: false }`
[INFO] [stdout] bd66b72079feffad338e904d8c128565cf270958dbe7b03359844a855de98c5e
