[INFO] updating cached repository https://github.com/foobert/rust-test
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b0c839b2916e4da1fc61735c89e6747dd3eca92
[INFO] checking foobert/rust-test against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffoobert%2Frust-test" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/foobert/rust-test on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/foobert/rust-test
[INFO] finished tweaking git repo https://github.com/foobert/rust-test
[INFO] tweaked toml for git repo https://github.com/foobert/rust-test written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/foobert/rust-test already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] dde3c898fe0794517db93fe4e7f9d3d127f041b44f0ae7260504bcdbc60e34be
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "dde3c898fe0794517db93fe4e7f9d3d127f041b44f0ae7260504bcdbc60e34be"`
[INFO] [stderr]     Checking libc v0.2.17
[INFO] [stderr]     Checking begw v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `mosq`
[INFO] [stderr]   --> src/main.rs:30:22
[INFO] [stderr]    |
[INFO] [stderr] 30 | extern fn on_message(mosq: *const Mosquitto, obj: *const libc::c_void, message: *mut MosquittoMessage) {
[INFO] [stderr]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_mosq`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `obj`
[INFO] [stderr]   --> src/main.rs:30:46
[INFO] [stderr]    |
[INFO] [stderr] 30 | extern fn on_message(mosq: *const Mosquitto, obj: *const libc::c_void, message: *mut MosquittoMessage) {
[INFO] [stderr]    |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut t = m.topic;
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mosq`
[INFO] [stderr]   --> src/main.rs:30:22
[INFO] [stderr]    |
[INFO] [stderr] 30 | extern fn on_message(mosq: *const Mosquitto, obj: *const libc::c_void, message: *mut MosquittoMessage) {
[INFO] [stderr]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_mosq`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `obj`
[INFO] [stderr]   --> src/main.rs:30:46
[INFO] [stderr]    |
[INFO] [stderr] 30 | extern fn on_message(mosq: *const Mosquitto, obj: *const libc::c_void, message: *mut MosquittoMessage) {
[INFO] [stderr]    |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut t = m.topic;
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "dde3c898fe0794517db93fe4e7f9d3d127f041b44f0ae7260504bcdbc60e34be"`
[INFO] running `"docker" "rm" "-f" "dde3c898fe0794517db93fe4e7f9d3d127f041b44f0ae7260504bcdbc60e34be"`
[INFO] [stdout] dde3c898fe0794517db93fe4e7f9d3d127f041b44f0ae7260504bcdbc60e34be