[INFO] fetching crate lynn_tcp 1.2.5...
[INFO] checking lynn_tcp-1.2.5 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate lynn_tcp 1.2.5 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate lynn_tcp 1.2.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate lynn_tcp 1.2.5
[INFO] tweaked toml for crates.io crate lynn_tcp 1.2.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lynn_tcp 1.2.5 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lynn_tcp 1.2.5 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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded prometheus v0.13.4
[INFO] [stderr]   Downloaded protobuf v2.28.0
[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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45aea38366f28cfe533c5322522c67c8c9b6983c714b4c8eee90f069c1af7bba
[INFO] running `Command { std: "docker" "start" "-a" "45aea38366f28cfe533c5322522c67c8c9b6983c714b4c8eee90f069c1af7bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45aea38366f28cfe533c5322522c67c8c9b6983c714b4c8eee90f069c1af7bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45aea38366f28cfe533c5322522c67c8c9b6983c714b4c8eee90f069c1af7bba", kill_on_drop: false }`
[INFO] [stdout] 45aea38366f28cfe533c5322522c67c8c9b6983c714b4c8eee90f069c1af7bba
[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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 958e6a0b6c74eb727e94b72d2a2c9c7c8fbfbe49d694ee4f2b39d87b596bbc36
[INFO] running `Command { std: "docker" "start" "-a" "958e6a0b6c74eb727e94b72d2a2c9c7c8fbfbe49d694ee4f2b39d87b596bbc36", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling protobuf v2.28.0
[INFO] [stderr]     Checking log v0.4.25
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling prometheus v0.13.4
[INFO] [stderr]     Checking tracing-core v0.1.33
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking socket2 v0.6.0
[INFO] [stderr]     Checking mio v1.0.3
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]     Checking tokio v1.47.1
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking lynn_tcp v1.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         METRICS.system.memory_used_bytes.set(128 * 1024 * 1024); // 128MB
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         METRICS.system.active_threads.set(4);
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         METRICS.connections.total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         METRICS.messages.received_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:64:22
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _timer = METRICS.messages.processing_duration_seconds.start_timer();
[INFO] [stdout]    |                      ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             METRICS.messages.size_bytes.observe(data as f64);
[INFO] [stdout]    |             ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         METRICS.messages.received_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |         METRICS.connections.total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         METRICS.connections.active.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         METRICS.connections.closed_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         METRICS.connections.failed_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         METRICS.messages.received_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         METRICS.messages.sent_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         METRICS.messages.invalid_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         METRICS.messages.dropped_total.inc();
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |         METRICS.network.bytes_received_total.inc_by(1024);
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |         METRICS.network.bytes_sent_total.inc_by(2048);
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]   --> examples/metrics_example.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         METRICS.system.memory_used_bytes.set(256 * 1024 * 1024);
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         METRICS.system.active_threads.set(8);
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |         METRICS.system.queue_size.set(100);
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         METRICS.errors.total
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |         METRICS.errors.rate_limit_rejected.inc();
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         METRICS.errors.validation_errors.inc();
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         METRICS.messages.size_bytes.observe(512.0);
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         METRICS.messages.processing_duration_seconds.observe(0.025);
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         METRICS.messages.processing_duration_seconds.observe(duration);
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `METRICS` in this scope
[INFO] [stdout]    --> examples/metrics_example.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |         METRICS.messages.processing_duration_seconds.observe_duration(|| {
[INFO] [stdout]     |         ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `metrics` is private
[INFO] [stdout]    --> examples/metrics_example.rs:129:23
[INFO] [stdout]     |
[INFO] [stdout] 129 |         use lynn_tcp::metrics::Timer;
[INFO] [stdout]     |                       ^^^^^^^ private module
[INFO] [stdout]     |
[INFO] [stdout] note: the module `metrics` is defined here
[INFO] [stdout]    --> src/lib.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 | mod metrics;
[INFO] [stdout]     | ^^^^^^^^^^^
[INFO] [stdout] help: consider importing one of these traits instead
[INFO] [stdout]     |
[INFO] [stdout] 129 -         use lynn_tcp::metrics::Timer;
[INFO] [stdout] 129 +         use crate::Timer;
[INFO] [stdout]     |
[INFO] [stdout] 129 |         use lynn_tcp::lynn_metrics::Timer;
[INFO] [stdout]     |                       +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/metrics_example.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 |         if let Some(data) = input_buf_vo.get_all_bytes().len() {
[INFO] [stdout]    |                ^^^^^^^^^^   ---------------------------------- this expression has type `usize`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                expected `usize`, found `Option<_>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `usize`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lynn_tcp` (example "metrics_example") due to 29 previous errors
[INFO] running `Command { std: "docker" "inspect" "958e6a0b6c74eb727e94b72d2a2c9c7c8fbfbe49d694ee4f2b39d87b596bbc36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "958e6a0b6c74eb727e94b72d2a2c9c7c8fbfbe49d694ee4f2b39d87b596bbc36", kill_on_drop: false }`
[INFO] [stdout] 958e6a0b6c74eb727e94b72d2a2c9c7c8fbfbe49d694ee4f2b39d87b596bbc36