[INFO] fetching crate humbird 0.1.4...
[INFO] checking humbird-0.1.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate humbird 0.1.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate humbird 0.1.4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate humbird 0.1.4
[INFO] finished tweaking crates.io crate humbird 0.1.4
[INFO] tweaked toml for crates.io crate humbird 0.1.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 137 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (latest: v0.50.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-appender v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e91da0d2ab94a531c2eee8fe62afe973f7a8d7ef634e4076b9ef54f3de42049c
[INFO] running `Command { std: "docker" "start" "-a" "e91da0d2ab94a531c2eee8fe62afe973f7a8d7ef634e4076b9ef54f3de42049c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e91da0d2ab94a531c2eee8fe62afe973f7a8d7ef634e4076b9ef54f3de42049c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e91da0d2ab94a531c2eee8fe62afe973f7a8d7ef634e4076b9ef54f3de42049c", kill_on_drop: false }`
[INFO] [stdout] e91da0d2ab94a531c2eee8fe62afe973f7a8d7ef634e4076b9ef54f3de42049c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34c6a834850a40fe5ba76f1ad79b151b2d36ea3615e617baeb68bb049c55e3e5
[INFO] running `Command { std: "docker" "start" "-a" "34c6a834850a40fe5ba76f1ad79b151b2d36ea3615e617baeb68bb049c55e3e5", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking winnow v0.6.5
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking encode_unicode v1.0.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking tracing-appender v0.2.3
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking prettytable-rs v0.10.0
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Checking humbird v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/core/server.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | /// global constants related to services
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `event::Event`
[INFO] [stdout]  --> src/core/server.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mio::{event::Event, Events, Interest, Poll, Token};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/core/event.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// global event pool
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/protocol/http.rs:494:21
[INFO] [stdout]     |
[INFO] [stdout] 494 |                       /// response body
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 495 | /                     match response.head.get("Content-Length") {
[INFO] [stdout] 496 | |                         Some(length_str) => {
[INFO] [stdout] 497 | |                             match length_str.parse::<u64>() {
[INFO] [stdout] 498 | |                                 Ok(length) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 518 | |                         None => break,
[INFO] [stdout] 519 | |                     }
[INFO] [stdout]     | |_____________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/core/server.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | /// global constants related to services
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `event::Event`
[INFO] [stdout]  --> src/core/server.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mio::{event::Event, Events, Interest, Poll, Token};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/core/event.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// global event pool
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/protocol/http.rs:494:21
[INFO] [stdout]     |
[INFO] [stdout] 494 |                       /// response body
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 495 | /                     match response.head.get("Content-Length") {
[INFO] [stdout] 496 | |                         Some(length_str) => {
[INFO] [stdout] 497 | |                             match length_str.parse::<u64>() {
[INFO] [stdout] 498 | |                                 Ok(length) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 518 | |                         None => break,
[INFO] [stdout] 519 | |                     }
[INFO] [stdout]     | |_____________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/core/proxy.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             _ => Err("".to_string()),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/core/proxy.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             _ => Err("".to_string()),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/core/server.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     io::{self, Write},
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `http`
[INFO] [stdout]    --> src/core/server.rs:172:40
[INFO] [stdout]     |
[INFO] [stdout] 172 | ...                   Ok(http) => {}
[INFO] [stdout]     |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_http`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]    --> src/core/server.rs:180:46
[INFO] [stdout]     |
[INFO] [stdout] 180 | ...                   Some(stream) => {
[INFO] [stdout]     |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/core/server.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     io::{self, Write},
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `http`
[INFO] [stdout]    --> src/core/server.rs:172:40
[INFO] [stdout]     |
[INFO] [stdout] 172 | ...                   Ok(http) => {}
[INFO] [stdout]     |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_http`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]    --> src/core/server.rs:180:46
[INFO] [stdout]     |
[INFO] [stdout] 180 | ...                   Some(stream) => {
[INFO] [stdout]     |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/protocol/http.rs:436:21
[INFO] [stdout]     |
[INFO] [stdout] 436 |                 Err(e) => {}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `request` and `response` are never read
[INFO] [stdout]   --> src/core/proxy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Proxy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     /// request abstract structure
[INFO] [stdout] 23 |     request: Request,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     /// Response abstract structure
[INFO] [stdout] 25 |     response: Response,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Proxy` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/protocol/http.rs:436:21
[INFO] [stdout]     |
[INFO] [stdout] 436 |                 Err(e) => {}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol` and `params` are never read
[INFO] [stdout]    --> src/protocol/http.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Request {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 157 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 158 |     params: HashMap<String, String>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol`, `req_method`, and `req_path` are never read
[INFO] [stdout]    --> src/protocol/http.rs:388:5
[INFO] [stdout]     |
[INFO] [stdout] 387 | pub struct Response {
[INFO] [stdout]     |            -------- fields in this struct
[INFO] [stdout] 388 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 395 |     req_method: Method,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 396 |     req_path: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Response` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `request` and `response` are never read
[INFO] [stdout]   --> src/core/proxy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Proxy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     /// request abstract structure
[INFO] [stdout] 23 |     request: Request,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     /// Response abstract structure
[INFO] [stdout] 25 |     response: Response,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Proxy` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol` and `params` are never read
[INFO] [stdout]    --> src/protocol/http.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Request {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 157 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 158 |     params: HashMap<String, String>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol`, `req_method`, and `req_path` are never read
[INFO] [stdout]    --> src/protocol/http.rs:388:5
[INFO] [stdout]     |
[INFO] [stdout] 387 | pub struct Response {
[INFO] [stdout]     |            -------- fields in this struct
[INFO] [stdout] 388 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 395 |     req_method: Method,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 396 |     req_path: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Response` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.08s
[INFO] running `Command { std: "docker" "inspect" "34c6a834850a40fe5ba76f1ad79b151b2d36ea3615e617baeb68bb049c55e3e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34c6a834850a40fe5ba76f1ad79b151b2d36ea3615e617baeb68bb049c55e3e5", kill_on_drop: false }`
[INFO] [stdout] 34c6a834850a40fe5ba76f1ad79b151b2d36ea3615e617baeb68bb049c55e3e5
[INFO] checking humbird-0.1.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate humbird 0.1.4 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate humbird 0.1.4 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate humbird 0.1.4
[INFO] finished tweaking crates.io crate humbird 0.1.4
[INFO] tweaked toml for crates.io crate humbird 0.1.4 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a582e15f0e9a59568d3468aee92195814e73488b6d0872f0c1c48a7adb8c9fb
[INFO] running `Command { std: "docker" "start" "-a" "0a582e15f0e9a59568d3468aee92195814e73488b6d0872f0c1c48a7adb8c9fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a582e15f0e9a59568d3468aee92195814e73488b6d0872f0c1c48a7adb8c9fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a582e15f0e9a59568d3468aee92195814e73488b6d0872f0c1c48a7adb8c9fb", kill_on_drop: false }`
[INFO] [stdout] 0a582e15f0e9a59568d3468aee92195814e73488b6d0872f0c1c48a7adb8c9fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 484f1e600e564405d2adf0d8493f66d6a76e4554f22299a08903dbb05653e664
[INFO] running `Command { std: "docker" "start" "-a" "484f1e600e564405d2adf0d8493f66d6a76e4554f22299a08903dbb05653e664", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking winnow v0.6.5
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking encode_unicode v1.0.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-appender v0.2.3
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking prettytable-rs v0.10.0
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Checking humbird v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/core/server.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | /// global constants related to services
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `event::Event`
[INFO] [stdout]  --> src/core/server.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mio::{event::Event, Events, Interest, Poll, Token};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/core/event.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// global event pool
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/protocol/http.rs:494:21
[INFO] [stdout]     |
[INFO] [stdout] 494 |                       /// response body
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 495 | /                     match response.head.get("Content-Length") {
[INFO] [stdout] 496 | |                         Some(length_str) => {
[INFO] [stdout] 497 | |                             match length_str.parse::<u64>() {
[INFO] [stdout] 498 | |                                 Ok(length) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 518 | |                         None => break,
[INFO] [stdout] 519 | |                     }
[INFO] [stdout]     | |_____________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/core/server.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | /// global constants related to services
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `event::Event`
[INFO] [stdout]  --> src/core/server.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mio::{event::Event, Events, Interest, Poll, Token};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/core/event.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// global event pool
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/protocol/http.rs:494:21
[INFO] [stdout]     |
[INFO] [stdout] 494 |                       /// response body
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 495 | /                     match response.head.get("Content-Length") {
[INFO] [stdout] 496 | |                         Some(length_str) => {
[INFO] [stdout] 497 | |                             match length_str.parse::<u64>() {
[INFO] [stdout] 498 | |                                 Ok(length) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 518 | |                         None => break,
[INFO] [stdout] 519 | |                     }
[INFO] [stdout]     | |_____________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/core/proxy.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             _ => Err("".to_string()),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/core/proxy.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             _ => Err("".to_string()),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/core/server.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     io::{self, Write},
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `http`
[INFO] [stdout]    --> src/core/server.rs:172:40
[INFO] [stdout]     |
[INFO] [stdout] 172 | ...                   Ok(http) => {}
[INFO] [stdout]     |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_http`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]    --> src/core/server.rs:180:46
[INFO] [stdout]     |
[INFO] [stdout] 180 | ...                   Some(stream) => {
[INFO] [stdout]     |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/protocol/http.rs:436:21
[INFO] [stdout]     |
[INFO] [stdout] 436 |                 Err(e) => {}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `request` and `response` are never read
[INFO] [stdout]   --> src/core/proxy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Proxy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     /// request abstract structure
[INFO] [stdout] 23 |     request: Request,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     /// Response abstract structure
[INFO] [stdout] 25 |     response: Response,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Proxy` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol` and `params` are never read
[INFO] [stdout]    --> src/protocol/http.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Request {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 157 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 158 |     params: HashMap<String, String>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol`, `req_method`, and `req_path` are never read
[INFO] [stdout]    --> src/protocol/http.rs:388:5
[INFO] [stdout]     |
[INFO] [stdout] 387 | pub struct Response {
[INFO] [stdout]     |            -------- fields in this struct
[INFO] [stdout] 388 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 395 |     req_method: Method,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 396 |     req_path: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Response` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/core/server.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     io::{self, Write},
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `http`
[INFO] [stdout]    --> src/core/server.rs:172:40
[INFO] [stdout]     |
[INFO] [stdout] 172 | ...                   Ok(http) => {}
[INFO] [stdout]     |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_http`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]    --> src/core/server.rs:180:46
[INFO] [stdout]     |
[INFO] [stdout] 180 | ...                   Some(stream) => {
[INFO] [stdout]     |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/protocol/http.rs:436:21
[INFO] [stdout]     |
[INFO] [stdout] 436 |                 Err(e) => {}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `request` and `response` are never read
[INFO] [stdout]   --> src/core/proxy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Proxy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     /// request abstract structure
[INFO] [stdout] 23 |     request: Request,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     /// Response abstract structure
[INFO] [stdout] 25 |     response: Response,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Proxy` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol` and `params` are never read
[INFO] [stdout]    --> src/protocol/http.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Request {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 157 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 158 |     params: HashMap<String, String>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol`, `req_method`, and `req_path` are never read
[INFO] [stdout]    --> src/protocol/http.rs:388:5
[INFO] [stdout]     |
[INFO] [stdout] 387 | pub struct Response {
[INFO] [stdout]     |            -------- fields in this struct
[INFO] [stdout] 388 |     protocol: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 395 |     req_method: Method,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 396 |     req_path: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Response` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 35.08s
[INFO] running `Command { std: "docker" "inspect" "484f1e600e564405d2adf0d8493f66d6a76e4554f22299a08903dbb05653e664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "484f1e600e564405d2adf0d8493f66d6a76e4554f22299a08903dbb05653e664", kill_on_drop: false }`
[INFO] [stdout] 484f1e600e564405d2adf0d8493f66d6a76e4554f22299a08903dbb05653e664