[INFO] fetching crate quetta 0.1.0...
[INFO] testing quetta-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate quetta 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate quetta 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quetta 0.1.0
[INFO] finished tweaking crates.io crate quetta 0.1.0
[INFO] tweaked toml for crates.io crate quetta 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 527c92d4df40af5b8b65fa4ffec0a5756cbe747dc1fb05d356fa9209b28335e1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "527c92d4df40af5b8b65fa4ffec0a5756cbe747dc1fb05d356fa9209b28335e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "527c92d4df40af5b8b65fa4ffec0a5756cbe747dc1fb05d356fa9209b28335e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "527c92d4df40af5b8b65fa4ffec0a5756cbe747dc1fb05d356fa9209b28335e1", kill_on_drop: false }`
[INFO] [stdout] 527c92d4df40af5b8b65fa4ffec0a5756cbe747dc1fb05d356fa9209b28335e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b64455e8d59ae1a21130b1a49ed0f0885fe28c084ea3b2063502514d61d803db
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b64455e8d59ae1a21130b1a49ed0f0885fe28c084ea3b2063502514d61d803db", kill_on_drop: false }`
[INFO] [stderr]    Compiling quetta v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "b64455e8d59ae1a21130b1a49ed0f0885fe28c084ea3b2063502514d61d803db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b64455e8d59ae1a21130b1a49ed0f0885fe28c084ea3b2063502514d61d803db", kill_on_drop: false }`
[INFO] [stdout] b64455e8d59ae1a21130b1a49ed0f0885fe28c084ea3b2063502514d61d803db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61e3617973316adf5b4cb92982e1ed29cb5e33a0d83c4993ae943ab79af4f678
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "61e3617973316adf5b4cb92982e1ed29cb5e33a0d83c4993ae943ab79af4f678", kill_on_drop: false }`
[INFO] [stderr]    Compiling quetta v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "61e3617973316adf5b4cb92982e1ed29cb5e33a0d83c4993ae943ab79af4f678", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e3617973316adf5b4cb92982e1ed29cb5e33a0d83c4993ae943ab79af4f678", kill_on_drop: false }`
[INFO] [stdout] 61e3617973316adf5b4cb92982e1ed29cb5e33a0d83c4993ae943ab79af4f678
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c1e32c1ffd4ebb6c2fdf9b366f0956c4b2b8b0abeb76de5d5947df1a18047829
[INFO] running `Command { std: "docker" "start" "-a" "c1e32c1ffd4ebb6c2fdf9b366f0956c4b2b8b0abeb76de5d5947df1a18047829", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/quetta-fb4b79a73f903989)
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::test_lift_many ... ok
[INFO] [stdout] test tests::test_lift ... ok
[INFO] [stdout] test tests::test_slice1 ... ok
[INFO] [stdout] test tests::test_invalid_slices1 - should panic ... ok
[INFO] [stdout] test tests::test_invalid_slices2 - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests quetta
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test src/lib.rs - Text::try_lift (line 281) ... FAILED
[INFO] [stdout] test src/lib.rs - Text::lift (line 298) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] test src/lib.rs - Text::slice (line 207) ... ok
[INFO] [stdout] test src/lib.rs - Text::lift_slice (line 264) ... ok
[INFO] [stdout] test src/lib.rs - Text::lift_many (line 338) ... ok
[INFO] [stdout] test src/lib.rs - Text::try_lift_slice (line 248) ... ok
[INFO] [stdout] test src/lib.rs - Text::len (line 221) ... ok
[INFO] [stdout] test src/lib.rs - Text::substring (line 174) ... ok
[INFO] [stdout] test src/lib.rs - Text::try_lift_many (line 315) ... ok
[INFO] [stdout] test src/lib.rs - Text::is_empty (line 234) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Text::try_lift (line 281) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:285:42
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_281_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | use quetta::Text;
[INFO] [stdout] 5 | |
[INFO] [stdout] 6 | | let text = Text::new("  a  ");
[INFO] [stdout] 7 | | let trimmed = text.try_lift(|t| t.trim())?;
[INFO] [stdout]   | |                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 8 | | assert_eq!("a", trimmed.as_str());
[INFO] [stdout] 9 | | } _doctest_main_src_lib_rs_281_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Text::lift (line 298) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/lib.rs:302:42
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_298_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | use quetta::Text;
[INFO] [stdout] 5 | |
[INFO] [stdout] 6 | | let text = Text::new("  a  ");
[INFO] [stdout] 7 | | let trimmed = text.try_lift(|t| t.trim())?;
[INFO] [stdout]   | |                                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 8 | | assert_eq!("a", trimmed.as_str());
[INFO] [stdout] 9 | | } _doctest_main_src_lib_rs_298_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Text::lift (line 298)
[INFO] [stdout]     src/lib.rs - Text::try_lift (line 281)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.21s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "c1e32c1ffd4ebb6c2fdf9b366f0956c4b2b8b0abeb76de5d5947df1a18047829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1e32c1ffd4ebb6c2fdf9b366f0956c4b2b8b0abeb76de5d5947df1a18047829", kill_on_drop: false }`
[INFO] [stdout] c1e32c1ffd4ebb6c2fdf9b366f0956c4b2b8b0abeb76de5d5947df1a18047829