[INFO] fetching crate retentive-lender 0.1.0...
[INFO] testing retentive-lender-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate retentive-lender 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate retentive-lender 0.1.0
[INFO] finished tweaking crates.io crate retentive-lender 0.1.0
[INFO] tweaked toml for crates.io crate retentive-lender 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate retentive-lender 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 245a6d4d30082fea1aa6d2915d172b500f4a2028c8dd018b36c6011e64be1826
[INFO] running `Command { std: "docker" "start" "-a" "245a6d4d30082fea1aa6d2915d172b500f4a2028c8dd018b36c6011e64be1826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "245a6d4d30082fea1aa6d2915d172b500f4a2028c8dd018b36c6011e64be1826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "245a6d4d30082fea1aa6d2915d172b500f4a2028c8dd018b36c6011e64be1826", kill_on_drop: false }`
[INFO] [stdout] 245a6d4d30082fea1aa6d2915d172b500f4a2028c8dd018b36c6011e64be1826
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e3c546787791f330342741bc5b289b3064be10a5444c484a2e74965054d925e7
[INFO] running `Command { std: "docker" "start" "-a" "e3c546787791f330342741bc5b289b3064be10a5444c484a2e74965054d925e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling retentive-lender v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:19
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<T>, String> {
[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] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<'_, T>, String> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<T>, String> {
[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] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<'_, T>, String> {
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "e3c546787791f330342741bc5b289b3064be10a5444c484a2e74965054d925e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c546787791f330342741bc5b289b3064be10a5444c484a2e74965054d925e7", kill_on_drop: false }`
[INFO] [stdout] e3c546787791f330342741bc5b289b3064be10a5444c484a2e74965054d925e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] fb58a310c0eb857cacf878959188a630570cd06dd6280e54d7d983bade141d64
[INFO] running `Command { std: "docker" "start" "-a" "fb58a310c0eb857cacf878959188a630570cd06dd6280e54d7d983bade141d64", kill_on_drop: false }`
[INFO] [stderr]    Compiling retentive-lender v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:19
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<T>, String> {
[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] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<'_, T>, String> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<T>, String> {
[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] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<'_, T>, String> {
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:19
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<T>, String> {
[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] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<'_, T>, String> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<T>, String> {
[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] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<'_, T>, String> {
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "fb58a310c0eb857cacf878959188a630570cd06dd6280e54d7d983bade141d64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb58a310c0eb857cacf878959188a630570cd06dd6280e54d7d983bade141d64", kill_on_drop: false }`
[INFO] [stdout] fb58a310c0eb857cacf878959188a630570cd06dd6280e54d7d983bade141d64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1800a52f144d62c7580da31582be981808e56377f1f3686e81aea443c1d888e9
[INFO] running `Command { std: "docker" "start" "-a" "1800a52f144d62c7580da31582be981808e56377f1f3686e81aea443c1d888e9", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:112:19
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<T>, String> {
[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] 112 |     pub fn borrow(&self, borrower: &str) -> Result<Ref<'_, T>, String> {
[INFO] [stderr]     |                                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:127:23
[INFO] [stderr]     |
[INFO] [stderr] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<T>, String> {
[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] 127 |     pub fn borrow_mut(&self, borrower: &str) -> Result<RefMut<'_, T>, String> {
[INFO] [stderr]     |                                                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: `retentive-lender` (lib) generated 2 warnings (run `cargo fix --lib -p retentive-lender` to apply 2 suggestions)
[INFO] [stderr] warning: `retentive-lender` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/retentive_lender-f15f8590e887270b)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::borrow_once_borrow_mut_once ... ok
[INFO] [stdout] test tests::borrow_mut_twice ... ok
[INFO] [stdout] test tests::borrow_twice ... ok
[INFO] [stdout] test tests::borrow_mut_once_borrow_once ... ok
[INFO] [stdout] test tests::borrow_twice_borrow_mut_once ... ok
[INFO] [stderr]    Doc-tests retentive_lender
[INFO] [stdout] test tests::clone_and_borrow_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1800a52f144d62c7580da31582be981808e56377f1f3686e81aea443c1d888e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1800a52f144d62c7580da31582be981808e56377f1f3686e81aea443c1d888e9", kill_on_drop: false }`
[INFO] [stdout] 1800a52f144d62c7580da31582be981808e56377f1f3686e81aea443c1d888e9
