[INFO] fetching crate retry-strategy 0.2.0...
[INFO] testing retry-strategy-0.2.0 against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065
[INFO] extracting crate retry-strategy 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate retry-strategy 0.2.0
[INFO] finished tweaking crates.io crate retry-strategy 0.2.0
[INFO] tweaked toml for crates.io crate retry-strategy 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate retry-strategy 0.2.0 on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "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" "+0abe69e6c16114311cc2700e972492e64d69c28f" "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]      Locking 26 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4ca2c0841d3fb788ac4782290db3825de0ab53b4f24d0a4b315d06bf243b3fc
[INFO] running `Command { std: "docker" "start" "-a" "a4ca2c0841d3fb788ac4782290db3825de0ab53b4f24d0a4b315d06bf243b3fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4ca2c0841d3fb788ac4782290db3825de0ab53b4f24d0a4b315d06bf243b3fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4ca2c0841d3fb788ac4782290db3825de0ab53b4f24d0a4b315d06bf243b3fc", kill_on_drop: false }`
[INFO] [stdout] a4ca2c0841d3fb788ac4782290db3825de0ab53b4f24d0a4b315d06bf243b3fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9084670a1aaf9910af4d955447faf9340a1e843f7cee0d24d5af511e86176bf
[INFO] running `Command { std: "docker" "start" "-a" "c9084670a1aaf9910af4d955447faf9340a1e843f7cee0d24d5af511e86176bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling pin-project-lite v0.2.17
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling pin-project-internal v1.1.11
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling pin-project v1.1.11
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling futures-executor v0.3.32
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling retry-strategy v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.68s
[INFO] running `Command { std: "docker" "inspect" "c9084670a1aaf9910af4d955447faf9340a1e843f7cee0d24d5af511e86176bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9084670a1aaf9910af4d955447faf9340a1e843f7cee0d24d5af511e86176bf", kill_on_drop: false }`
[INFO] [stdout] c9084670a1aaf9910af4d955447faf9340a1e843f7cee0d24d5af511e86176bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6cad718f74ec4788c35cf91335487a1457ffaa3bb5e3a2434cb72358197ad08
[INFO] running `Command { std: "docker" "start" "-a" "d6cad718f74ec4788c35cf91335487a1457ffaa3bb5e3a2434cb72358197ad08", kill_on_drop: false }`
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling retry-strategy v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `random`
[INFO] [stdout]  --> src/strategy/mod.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(feature = "random")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "d6cad718f74ec4788c35cf91335487a1457ffaa3bb5e3a2434cb72358197ad08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6cad718f74ec4788c35cf91335487a1457ffaa3bb5e3a2434cb72358197ad08", kill_on_drop: false }`
[INFO] [stdout] d6cad718f74ec4788c35cf91335487a1457ffaa3bb5e3a2434cb72358197ad08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e8f6931cb588d27abe09babf120e376f12bd3c720a41e8535ba7e761fa4bc933
[INFO] running `Command { std: "docker" "start" "-a" "e8f6931cb588d27abe09babf120e376f12bd3c720a41e8535ba7e761fa4bc933", kill_on_drop: false }`
[INFO] [stderr] warning: unexpected `cfg` condition value: `random`
[INFO] [stderr]  --> src/strategy/mod.rs:6:7
[INFO] [stderr]   |
[INFO] [stderr] 6 | #[cfg(feature = "random")]
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stderr]   |
[INFO] [stderr]   = note: no expected values for `feature`
[INFO] [stderr]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `random`
[INFO] [stderr]  --> src/strategy/mod.rs:9:7
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[cfg(feature = "random")]
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stderr]   |
[INFO] [stderr]   = note: no expected values for `feature`
[INFO] [stderr]   = help: consider adding `random` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: `retry-strategy` (lib) generated 2 warnings
[INFO] [stderr] warning: `retry-strategy` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/retry_strategy-2243c0016c82412f)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test strategy::tests::test_opportunity ... ok
[INFO] [stdout] test strategy::tests::exponential_with_factor ... ok
[INFO] [stdout] test strategy::tests::exponential_overflow ... ok
[INFO] [stdout] test strategy::tests::fibonacci_saturated ... ok
[INFO] [stdout] test strategy::tests::fibonacci ... ok
[INFO] [stdout] test tests::test_retry ... ok
[INFO] [stderr]    Doc-tests retry_strategy
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.56s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - retry (line 63) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - retry (line 63) stdout ----
[INFO] [stdout] error[E0425]: cannot find function `retry` in this scope
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 | let res = retry(
[INFO] [stdout]    |           ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 63 + use retry_strategy::retry;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `sleep` in this scope
[INFO] [stdout]   --> src/lib.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         sleep(Duration::from_millis(250)).await;
[INFO] [stdout]    |         ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout] 63 + use std::thread::sleep;
[INFO] [stdout]    |
[INFO] [stdout] 63 + use tokio::time::sleep;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `Duration` in this scope
[INFO] [stdout]   --> src/lib.rs:67:15
[INFO] [stdout]    |
[INFO] [stdout] 67 |         sleep(Duration::from_millis(250)).await;
[INFO] [stdout]    |               ^^^^^^^^ use of undeclared type `Duration`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout] 63 + use std::time::Duration;
[INFO] [stdout]    |
[INFO] [stdout] 63 + use tokio::time::Duration;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:70:3
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_63_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 70 | ).await;
[INFO] [stdout]    |   ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0689]: can't call method `ms` on ambiguous numeric type `{integer}`
[INFO] [stdout]   --> src/lib.rs:65:14
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100.ms(), 200.ms(), 300.ms()],
[INFO] [stdout]    |              ^^
[INFO] [stdout]    |
[INFO] [stdout] help: you must specify a concrete type for this numeric value, like `i32`
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100_i32.ms(), 200.ms(), 300.ms()],
[INFO] [stdout]    |             ++++
[INFO] [stdout] 
[INFO] [stdout] error[E0689]: can't call method `ms` on ambiguous numeric type `{integer}`
[INFO] [stdout]   --> src/lib.rs:65:24
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100.ms(), 200.ms(), 300.ms()],
[INFO] [stdout]    |                        ^^
[INFO] [stdout]    |
[INFO] [stdout] help: you must specify a concrete type for this numeric value, like `i32`
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100.ms(), 200_i32.ms(), 300.ms()],
[INFO] [stdout]    |                       ++++
[INFO] [stdout] 
[INFO] [stdout] error[E0689]: can't call method `ms` on ambiguous numeric type `{integer}`
[INFO] [stdout]   --> src/lib.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100.ms(), 200.ms(), 300.ms()],
[INFO] [stdout]    |                                  ^^
[INFO] [stdout]    |
[INFO] [stdout] help: you must specify a concrete type for this numeric value, like `i32`
[INFO] [stdout]    |
[INFO] [stdout] 65 |     vec![100.ms(), 200.ms(), 300_i32.ms()],
[INFO] [stdout]    |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433, E0689, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - retry (line 63)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "e8f6931cb588d27abe09babf120e376f12bd3c720a41e8535ba7e761fa4bc933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8f6931cb588d27abe09babf120e376f12bd3c720a41e8535ba7e761fa4bc933", kill_on_drop: false }`
[INFO] [stdout] e8f6931cb588d27abe09babf120e376f12bd3c720a41e8535ba7e761fa4bc933
