[INFO] fetching crate sans-io-runtime 0.3.0...
[INFO] testing sans-io-runtime-0.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate sans-io-runtime 0.3.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate sans-io-runtime 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate sans-io-runtime 0.3.0
[INFO] tweaked toml for crates.io crate sans-io-runtime 0.3.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sans-io-runtime 0.3.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sans-io-runtime 0.3.0 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf2f40c35f7119527c6b45a24dbfc4e9d4675f54bf6cfedcfb0cbb85d7e849f8
[INFO] running `Command { std: "docker" "start" "-a" "cf2f40c35f7119527c6b45a24dbfc4e9d4675f54bf6cfedcfb0cbb85d7e849f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf2f40c35f7119527c6b45a24dbfc4e9d4675f54bf6cfedcfb0cbb85d7e849f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf2f40c35f7119527c6b45a24dbfc4e9d4675f54bf6cfedcfb0cbb85d7e849f8", kill_on_drop: false }`
[INFO] [stdout] cf2f40c35f7119527c6b45a24dbfc4e9d4675f54bf6cfedcfb0cbb85d7e849f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30360d3177e18f13406193d16752219f8a780405e7961a99ae30f701177e9e97
[INFO] running `Command { std: "docker" "start" "-a" "30360d3177e18f13406193d16752219f8a780405e7961a99ae30f701177e9e97", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling hashbrown v0.15.1
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]    Compiling winnow v0.6.20
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling rustix v0.38.39
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.15
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling indexmap v2.6.0
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling socket2 v0.5.7
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling toml_edit v0.22.22
[INFO] [stderr]    Compiling derive_more-impl v1.0.0
[INFO] [stderr]    Compiling proc-macro-crate v3.2.0
[INFO] [stderr]    Compiling convert-enum v0.1.0
[INFO] [stderr]    Compiling num_enum_derive v0.7.3
[INFO] [stderr]    Compiling polling v3.7.4
[INFO] [stderr]    Compiling num_enum v0.7.3
[INFO] [stderr]    Compiling derive_more v1.0.0
[INFO] [stderr]    Compiling sans-io-runtime v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView> {
[INFO] [stdout]    |                 ^^^^^ the lifetime is elided here               ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]    |                     ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:107:22
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]     |                      ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]     |                                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.91s
[INFO] running `Command { std: "docker" "inspect" "30360d3177e18f13406193d16752219f8a780405e7961a99ae30f701177e9e97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30360d3177e18f13406193d16752219f8a780405e7961a99ae30f701177e9e97", kill_on_drop: false }`
[INFO] [stdout] 30360d3177e18f13406193d16752219f8a780405e7961a99ae30f701177e9e97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9a05a6154e0508b9fb5a9b4dc8e4d0983ee522cc84886f7da32a4ca2afc21d0
[INFO] running `Command { std: "docker" "start" "-a" "d9a05a6154e0508b9fb5a9b4dc8e4d0983ee522cc84886f7da32a4ca2afc21d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling pkg-config v0.3.31
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling cc v1.1.37
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling anstyle v1.0.10
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling thiserror v1.0.68
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling predicates-core v1.0.8
[INFO] [stderr]    Compiling mockall_derive v0.13.0
[INFO] [stderr]    Compiling openssl v0.10.68
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]    Compiling bytes v1.8.0
[INFO] [stderr]    Compiling crc-catalog v2.4.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling crc v3.2.1
[INFO] [stderr]    Compiling anstyle-parse v0.2.6
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling anstyle-query v1.1.2
[INFO] [stderr]    Compiling cpufeatures v0.2.14
[INFO] [stderr]    Compiling colorchoice v1.0.3
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[INFO] [stderr]    Compiling predicates v3.1.2
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[INFO] [stderr]    Compiling chunked_transfer v1.5.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling downcast v0.11.0
[INFO] [stderr]    Compiling tiny_http v0.12.0
[INFO] [stderr]    Compiling combine v4.6.7
[INFO] [stderr]    Compiling openssl-src v300.4.0+3.4.0
[INFO] [stderr]    Compiling sha1-asm v0.5.3
[INFO] [stderr]    Compiling regex-automata v0.4.8
[INFO] [stderr]    Compiling openssl-sys v0.9.104
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_filter v0.1.2
[INFO] [stderr]    Compiling env_logger v0.11.5
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling thiserror-impl v1.0.68
[INFO] [stderr]    Compiling derive_more-impl v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling num_enum_derive v0.7.3
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling num_enum v0.7.3
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling polling v3.7.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling mockall v0.13.0
[INFO] [stderr]    Compiling derive_more v1.0.0
[INFO] [stderr]    Compiling sans-io-runtime v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling sctp-proto v0.3.0
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView> {
[INFO] [stdout]    |                 ^^^^^ the lifetime is elided here               ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]    |                     ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:107:22
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]     |                      ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]     |                                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling str0m v0.6.2
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn view(&self) -> BufferViewInner<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView> {
[INFO] [stdout]    |                 ^^^^^ the lifetime is elided here               ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/buffer.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]    |                     ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]    |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:107:22
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stdout]     |                      ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stdout]     |                                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2m 57s
[INFO] running `Command { std: "docker" "inspect" "d9a05a6154e0508b9fb5a9b4dc8e4d0983ee522cc84886f7da32a4ca2afc21d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9a05a6154e0508b9fb5a9b4dc8e4d0983ee522cc84886f7da32a4ca2afc21d0", kill_on_drop: false }`
[INFO] [stdout] d9a05a6154e0508b9fb5a9b4dc8e4d0983ee522cc84886f7da32a4ca2afc21d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cf98fd0bf6434c3dc4b5fdfcc23adf23e23684c08b07a8afc9470ea0c3b3dfda
[INFO] running `Command { std: "docker" "start" "-a" "cf98fd0bf6434c3dc4b5fdfcc23adf23e23684c08b07a8afc9470ea0c3b3dfda", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/buffer.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn view(&self) -> BufferViewInner {
[INFO] [stderr]    |                 ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn view(&self) -> BufferViewInner<'_> {
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/buffer.rs:84:17
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView> {
[INFO] [stderr]    |                 ^^^^^ the lifetime is elided here               ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn view(&self, range: std::ops::Range<usize>) -> Option<BufferView<'_>> {
[INFO] [stderr]    |                                                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/buffer.rs:95:21
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stderr]    |                     ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn pop_back(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stderr]    |                                                                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/buffer.rs:107:22
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView> {
[INFO] [stderr]     |                      ^^^^^^^^^                        ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn pop_front(&mut self, len: usize) -> Option<BufferView<'_>> {
[INFO] [stderr]     |                                                                 ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sans-io-runtime` (lib) generated 4 warnings (run `cargo fix --lib -p sans-io-runtime` to apply 4 suggestions)
[INFO] [stderr] warning: `sans-io-runtime` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sans_io_runtime-976d790993aea595)
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test buffer::tests::buffer_inner_expand ... ok
[INFO] [stdout] test buffer::tests::simple_buffer_mut ... ok
[INFO] [stdout] test buffer::tests::buffer_expand ... ok
[INFO] [stdout] test buffer::tests::simple_buffer_view ... ok
[INFO] [stdout] test bus::leg::tests::test_recv_empty_queue ... ok
[INFO] [stdout] test bus::leg::tests::test_send_and_recv ... ok
[INFO] [stdout] test bus::leg::tests::test_send_channel_full ... ok
[INFO] [stdout] test bus::local_hub::tests::test_get_subscribers ... ok
[INFO] [stdout] test bus::local_hub::tests::test_subscribe_unsubscribe ... ok
[INFO] [stdout] test collections::bit_vec::test::extend_bytes ... ok
[INFO] [stdout] test collections::dequeue::tests::test_is_empty ... ok
[INFO] [stdout] test collections::bit_vec::test::simple_work ... ok
[INFO] [stdout] test collections::dequeue::tests::test_push_back ... ok
[INFO] [stdout] test collections::dequeue::tests::test_pop_front ... ok
[INFO] [stdout] test collections::vec::tests::test_from ... ok
[INFO] [stdout] test collections::vec::tests::test_new ... ok
[INFO] [stdout] test collections::vec::tests::test_pop ... ok
[INFO] [stdout] test collections::vec::tests::test_push ... ok
[INFO] [stdout] test collections::vec::tests::test_push_safe ... ok
[INFO] [stdout] test collections::vec::tests::test_push_stack ... ok
[INFO] [stdout] test task::switcher::tests::queue_test2 ... ok
[INFO] [stdout] test task::switcher::tests::queue_with_stack_like_style ... ok
[INFO] [stdout] test backend::polling::tests::test_on_action_udp_listen_success ... ok
[INFO] [stdout] test backend::poll::tests::test_on_action_udp_listen_success ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 24 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sans_io_runtime
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/collections/vec.rs - collections::vec::DynamicVec (line 20) ... ok
[INFO] [stdout] test src/collections/vec.rs - collections::vec::DynamicVec (line 31) ... ok
[INFO] [stdout] test src/collections/vec.rs - collections::vec::DynamicVec (line 12) ... ok
[INFO] [stdout] test src/task/switcher.rs - task::switcher::TaskSwitcherChild (line 11) ... ok
[INFO] [stdout] test src/backend/poll.rs - backend::poll (line 9) ... ok
[INFO] [stdout] test src/collections/dequeue.rs - collections::dequeue::DynamicDeque (line 8) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.68s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cf98fd0bf6434c3dc4b5fdfcc23adf23e23684c08b07a8afc9470ea0c3b3dfda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf98fd0bf6434c3dc4b5fdfcc23adf23e23684c08b07a8afc9470ea0c3b3dfda", kill_on_drop: false }`
[INFO] [stdout] cf98fd0bf6434c3dc4b5fdfcc23adf23e23684c08b07a8afc9470ea0c3b3dfda
