[INFO] cloning repository https://github.com/tzx/kv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tzx/kv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftzx%2Fkv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftzx%2Fkv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0437875e4215c0db821907e83bf42877ac6f3708
[INFO] checking tzx/kv against master#8a65ee08296b36342bf7c3cdc15312ccbc357227 for pr-142704
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftzx%2Fkv" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tzx/kv on toolchain 8a65ee08296b36342bf7c3cdc15312ccbc357227
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tzx/kv
[INFO] finished tweaking git repo https://github.com/tzx/kv
[INFO] tweaked toml for git repo https://github.com/tzx/kv written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tzx/kv 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" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e0aae00efe29edab8e2bf6346d1cb1d028523c89dc12860ebb32242b45f1008
[INFO] running `Command { std: "docker" "start" "-a" "0e0aae00efe29edab8e2bf6346d1cb1d028523c89dc12860ebb32242b45f1008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e0aae00efe29edab8e2bf6346d1cb1d028523c89dc12860ebb32242b45f1008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e0aae00efe29edab8e2bf6346d1cb1d028523c89dc12860ebb32242b45f1008", kill_on_drop: false }`
[INFO] [stdout] 0e0aae00efe29edab8e2bf6346d1cb1d028523c89dc12860ebb32242b45f1008
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a578072eaf11ecd4a1c126ac50fb00a72f0c6cf081898beeef6a23542209cb49
[INFO] running `Command { std: "docker" "start" "-a" "a578072eaf11ecd4a1c126ac50fb00a72f0c6cf081898beeef6a23542209cb49", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking messages v0.1.0 (/opt/rustwide/workdir/messages)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> messages/src/messages.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn to_cmd(data: &[u8], total_len: usize) -> Result<Command, ParseError> {
[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] 139 | pub fn to_cmd(data: &[u8], total_len: usize) -> Result<Command<'_>, ParseError> {
[INFO] [stdout]     |                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking client v0.1.0 (/opt/rustwide/workdir/client)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> messages/src/messages.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn to_cmd(data: &[u8], total_len: usize) -> Result<Command, ParseError> {
[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] 139 | pub fn to_cmd(data: &[u8], total_len: usize) -> Result<Command<'_>, ParseError> {
[INFO] [stdout]     |                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pollq v0.1.0 (/opt/rustwide/workdir/pollq)
[INFO] [stdout] warning: method `change_events` is never used
[INFO] [stdout]   --> pollq/src/pollq.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl PqFd {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn change_events(&mut self, reading: bool) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `change_events` is never used
[INFO] [stdout]   --> pollq/src/pollq.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl PqFd {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn change_events(&mut self, reading: bool) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] warning: unused variable: `com`
[INFO] [stdout]   --> server/src/main.rs:91:18
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn handle_active(com: &PqFd, tpq: &mut TaskPollQueue) {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_com`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tpq`
[INFO] [stdout]   --> server/src/main.rs:91:30
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn handle_active(com: &PqFd, tpq: &mut TaskPollQueue) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_tpq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `kv`
[INFO] [stdout]   --> server/src/main.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut kv: KV = HashMap::new();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_kv`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `com`
[INFO] [stdout]   --> server/src/main.rs:91:18
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn handle_active(com: &PqFd, tpq: &mut TaskPollQueue) {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_com`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tpq`
[INFO] [stdout]   --> server/src/main.rs:91:30
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn handle_active(com: &PqFd, tpq: &mut TaskPollQueue) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_tpq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `kv`
[INFO] [stdout]   --> server/src/main.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut kv: KV = HashMap::new();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_kv`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> server/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut kv: KV = HashMap::new();
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> server/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut kv: KV = HashMap::new();
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `tpq` as mutable more than once at a time
[INFO] [stdout]    --> server/src/main.rs:110:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let actives = tpq.poll_actives().expect("There was an error while polling!");
[INFO] [stdout]     |                       --- first mutable borrow occurs here
[INFO] [stdout] 109 |         for com in actives.into_iter() {
[INFO] [stdout]     |                    ------------------- first borrow later used here
[INFO] [stdout] 110 |             handle_active(com, &mut tpq);
[INFO] [stdout]     |                                ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `tpq` as mutable more than once at a time
[INFO] [stdout]    --> server/src/main.rs:110:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let actives = tpq.poll_actives().expect("There was an error while polling!");
[INFO] [stdout]     |                       --- first mutable borrow occurs here
[INFO] [stdout] 109 |         for com in actives.into_iter() {
[INFO] [stdout]     |                    ------------------- first borrow later used here
[INFO] [stdout] 110 |             handle_active(com, &mut tpq);
[INFO] [stdout]     |                                ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `server` (bin "server" test) due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `server` (bin "server") due to 1 previous error; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a578072eaf11ecd4a1c126ac50fb00a72f0c6cf081898beeef6a23542209cb49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a578072eaf11ecd4a1c126ac50fb00a72f0c6cf081898beeef6a23542209cb49", kill_on_drop: false }`
[INFO] [stdout] a578072eaf11ecd4a1c126ac50fb00a72f0c6cf081898beeef6a23542209cb49
