[INFO] fetching crate undo 0.46.2...
[INFO] testing undo-0.46.2 against beta-2021-05-23 for beta-1.52-2
[INFO] extracting crate undo 0.46.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate undo 0.46.2 on toolchain beta-2021-05-23
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-05-23" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate undo 0.46.2
[INFO] finished tweaking crates.io crate undo 0.46.2
[INFO] tweaked toml for crates.io crate undo 0.46.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-05-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-05-23" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arrayvec v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02fbe9e2c9ac6c6d8331f683b247e3b46c098485fa9882ce19dd21f44b534b78
[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" "02fbe9e2c9ac6c6d8331f683b247e3b46c098485fa9882ce19dd21f44b534b78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02fbe9e2c9ac6c6d8331f683b247e3b46c098485fa9882ce19dd21f44b534b78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02fbe9e2c9ac6c6d8331f683b247e3b46c098485fa9882ce19dd21f44b534b78", kill_on_drop: false }`
[INFO] [stdout] 02fbe9e2c9ac6c6d8331f683b247e3b46c098485fa9882ce19dd21f44b534b78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "build" "--frozen" "--message-format=json", 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] 40aa337808960f8aed7d137cbc78ca409595c7d6485b2f8e6ad18b4facc5d013
[INFO] running `Command { std: "docker" "start" "-a" "40aa337808960f8aed7d137cbc78ca409595c7d6485b2f8e6ad18b4facc5d013", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling arrayvec v0.7.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling undo v0.46.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.75s
[INFO] running `Command { std: "docker" "inspect" "40aa337808960f8aed7d137cbc78ca409595c7d6485b2f8e6ad18b4facc5d013", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40aa337808960f8aed7d137cbc78ca409595c7d6485b2f8e6ad18b4facc5d013", kill_on_drop: false }`
[INFO] [stdout] 40aa337808960f8aed7d137cbc78ca409595c7d6485b2f8e6ad18b4facc5d013
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "test" "--frozen" "--no-run" "--message-format=json", 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] aadff4c2829f0c1b53f7918fe33ebfcbcbd9fec0d756541f476cc641f61e0bc4
[INFO] running `Command { std: "docker" "start" "-a" "aadff4c2829f0c1b53f7918fe33ebfcbcbd9fec0d756541f476cc641f61e0bc4", kill_on_drop: false }`
[INFO] [stderr]    Compiling undo v0.46.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.77s
[INFO] running `Command { std: "docker" "inspect" "aadff4c2829f0c1b53f7918fe33ebfcbcbd9fec0d756541f476cc641f61e0bc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aadff4c2829f0c1b53f7918fe33ebfcbcbd9fec0d756541f476cc641f61e0bc4", kill_on_drop: false }`
[INFO] [stdout] aadff4c2829f0c1b53f7918fe33ebfcbcbd9fec0d756541f476cc641f61e0bc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "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] 905bb289d8b4e6fa3dfb59e8e21df003c00eaa8ff1c030ce12409aa7e2f72d85
[INFO] running `Command { std: "docker" "start" "-a" "905bb289d8b4e6fa3dfb59e8e21df003c00eaa8ff1c030ce12409aa7e2f72d85", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 8 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/undo-2815ae46665b704e)
[INFO] [stdout] test record::tests::checkpoint_cancel ... ok
[INFO] [stderr]    Doc-tests undo
[INFO] [stdout] test record::tests::checkpoint_commit ... ok
[INFO] [stdout] test record::tests::checkpoint_saved ... ok
[INFO] [stdout] test history::tests::go_to ... ok
[INFO] [stdout] test record::tests::dyn_trait ... ok
[INFO] [stdout] test record::tests::go_to ... ok
[INFO] [stdout] test record::tests::queue_commit ... ok
[INFO] [stdout] test timeline::tests::limit ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/record.rs - record::Record (line 32) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 36) ... FAILED
[INFO] [stdout] test src/history.rs - history::Queue (line 522) ... FAILED
[INFO] [stdout] test src/timeline.rs - timeline::Timeline (line 26) ... FAILED
[INFO] [stdout] test src/record.rs - record::Queue (line 517) ... FAILED
[INFO] [stdout] test src/history.rs - history::History (line 24) ... FAILED
[INFO] [stdout] test src/record.rs - record::Builder (line 418) ... ok
[INFO] [stdout] test src/history.rs - history::Builder (line 443) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/record.rs - record::Record (line 32) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/record.rs:48:14
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 - (line 36) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/lib.rs:57:14
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/history.rs - history::Queue (line 522) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/history.rs:538:14
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/timeline.rs - timeline::Timeline (line 26) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/timeline.rs:42:14
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/record.rs - record::Queue (line 517) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/record.rs:533:14
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/history.rs - history::History (line 24) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/history.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> undo::Result<Add> where Result<<Add as Action>::Output, <Add as Action>::Error>: Termination {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/history.rs - history::History (line 24)
[INFO] [stdout]     src/history.rs - history::Queue (line 522)
[INFO] [stdout]     src/lib.rs - (line 36)
[INFO] [stdout]     src/record.rs - record::Queue (line 517)
[INFO] [stdout]     src/record.rs - record::Record (line 32)
[INFO] [stdout]     src/timeline.rs - timeline::Timeline (line 26)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 6 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.14s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "905bb289d8b4e6fa3dfb59e8e21df003c00eaa8ff1c030ce12409aa7e2f72d85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "905bb289d8b4e6fa3dfb59e8e21df003c00eaa8ff1c030ce12409aa7e2f72d85", kill_on_drop: false }`
[INFO] [stdout] 905bb289d8b4e6fa3dfb59e8e21df003c00eaa8ff1c030ce12409aa7e2f72d85