[INFO] fetching crate undo 0.46.3...
[INFO] testing undo-0.46.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate undo 0.46.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate undo 0.46.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate undo 0.46.3
[INFO] finished tweaking crates.io crate undo 0.46.3
[INFO] tweaked toml for crates.io crate undo 0.46.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arrayvec v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c83099db3ec18cdc9b1b5cad6d0bc14898256266cceb11d37412d227000f6d96
[INFO] running `Command { std: "docker" "start" "-a" "c83099db3ec18cdc9b1b5cad6d0bc14898256266cceb11d37412d227000f6d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c83099db3ec18cdc9b1b5cad6d0bc14898256266cceb11d37412d227000f6d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c83099db3ec18cdc9b1b5cad6d0bc14898256266cceb11d37412d227000f6d96", kill_on_drop: false }`
[INFO] [stdout] c83099db3ec18cdc9b1b5cad6d0bc14898256266cceb11d37412d227000f6d96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7d145dd1db2fae697491cbc050352c02e09e6083286b440baf6e557a4db9e85
[INFO] running `Command { std: "docker" "start" "-a" "f7d145dd1db2fae697491cbc050352c02e09e6083286b440baf6e557a4db9e85", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling arrayvec v0.7.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling undo v0.46.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.90s
[INFO] running `Command { std: "docker" "inspect" "f7d145dd1db2fae697491cbc050352c02e09e6083286b440baf6e557a4db9e85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7d145dd1db2fae697491cbc050352c02e09e6083286b440baf6e557a4db9e85", kill_on_drop: false }`
[INFO] [stdout] f7d145dd1db2fae697491cbc050352c02e09e6083286b440baf6e557a4db9e85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d4cee7ba8fe69d6aee7b3c4cdcbc3416572bb6e27de34012959f238fd372346
[INFO] running `Command { std: "docker" "start" "-a" "4d4cee7ba8fe69d6aee7b3c4cdcbc3416572bb6e27de34012959f238fd372346", kill_on_drop: false }`
[INFO] [stderr]    Compiling undo v0.46.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "4d4cee7ba8fe69d6aee7b3c4cdcbc3416572bb6e27de34012959f238fd372346", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d4cee7ba8fe69d6aee7b3c4cdcbc3416572bb6e27de34012959f238fd372346", kill_on_drop: false }`
[INFO] [stdout] 4d4cee7ba8fe69d6aee7b3c4cdcbc3416572bb6e27de34012959f238fd372346
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a7dd20839508e587e2ada0f87a225c3c1fcdcbe876af3d94ea615157b7da382f
[INFO] running `Command { std: "docker" "start" "-a" "a7dd20839508e587e2ada0f87a225c3c1fcdcbe876af3d94ea615157b7da382f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/undo-c57e1af4cf9c5977)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test record::tests::checkpoint_saved ... ok
[INFO] [stdout] test record::tests::checkpoint_commit ... ok
[INFO] [stdout] test record::tests::dyn_trait ... ok
[INFO] [stdout] test timeline::tests::limit ... ok
[INFO] [stdout] test history::tests::go_to ... ok
[INFO] [stdout] test record::tests::queue_commit ... ok
[INFO] [stdout] test record::tests::annul ... ok
[INFO] [stdout] test record::tests::checkpoint_cancel ... ok
[INFO] [stdout] test record::tests::go_to ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests undo
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - (line 36) ... FAILED
[INFO] [stdout] test src/record.rs - record::Queue (line 518) ... FAILED
[INFO] [stdout] test src/timeline.rs - timeline::Timeline (line 26) ... FAILED
[INFO] [stdout] test src/history.rs - history::History (line 24) ... FAILED
[INFO] [stdout] test src/history.rs - history::Queue (line 522) ... FAILED
[INFO] [stdout] test src/record.rs - record::Record (line 32) ... FAILED
[INFO] [stdout] test src/record.rs - record::Builder (line 419) ... ok
[INFO] [stdout] test src/history.rs - history::Builder (line 443) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[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/record.rs - record::Queue (line 518) stdout ----
[INFO] [stdout] error[E0277]: `main` has invalid return type `Result<<Add as Action>::Output, <Add as Action>::Error>`
[INFO] [stdout]   --> src/record.rs:534:14
[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/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] ---- 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/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] 
[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 518)
[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 0.33s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "a7dd20839508e587e2ada0f87a225c3c1fcdcbe876af3d94ea615157b7da382f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7dd20839508e587e2ada0f87a225c3c1fcdcbe876af3d94ea615157b7da382f", kill_on_drop: false }`
[INFO] [stdout] a7dd20839508e587e2ada0f87a225c3c1fcdcbe876af3d94ea615157b7da382f