[INFO] fetching crate undo 0.46.3...
[INFO] testing undo-0.46.3 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate undo 0.46.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate undo 0.46.3 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1af9eb17ec392dbad8aa0e4a1c344e815516d3328272d1b9b22778413fcbeb3
[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" "c1af9eb17ec392dbad8aa0e4a1c344e815516d3328272d1b9b22778413fcbeb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1af9eb17ec392dbad8aa0e4a1c344e815516d3328272d1b9b22778413fcbeb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1af9eb17ec392dbad8aa0e4a1c344e815516d3328272d1b9b22778413fcbeb3", kill_on_drop: false }`
[INFO] [stdout] c1af9eb17ec392dbad8aa0e4a1c344e815516d3328272d1b9b22778413fcbeb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96d2c31b658efac8a313ec5db36c1c325b058891a6c00c27c4ffd1239d982e64
[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" "96d2c31b658efac8a313ec5db36c1c325b058891a6c00c27c4ffd1239d982e64", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling undo v0.46.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.25s
[INFO] running `Command { std: "docker" "inspect" "96d2c31b658efac8a313ec5db36c1c325b058891a6c00c27c4ffd1239d982e64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96d2c31b658efac8a313ec5db36c1c325b058891a6c00c27c4ffd1239d982e64", kill_on_drop: false }`
[INFO] [stdout] 96d2c31b658efac8a313ec5db36c1c325b058891a6c00c27c4ffd1239d982e64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81b9cb025ddc666bb76ed54daf13504a5e1007254b8072bec5f8b12b7413189f
[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" "81b9cb025ddc666bb76ed54daf13504a5e1007254b8072bec5f8b12b7413189f", kill_on_drop: false }`
[INFO] [stderr]    Compiling undo v0.46.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "81b9cb025ddc666bb76ed54daf13504a5e1007254b8072bec5f8b12b7413189f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81b9cb025ddc666bb76ed54daf13504a5e1007254b8072bec5f8b12b7413189f", kill_on_drop: false }`
[INFO] [stdout] 81b9cb025ddc666bb76ed54daf13504a5e1007254b8072bec5f8b12b7413189f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e560f0cb7de9ace1b17ed3c16ec95f8f5fdb3e39a8a939d30823a7663bf81197
[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" "e560f0cb7de9ace1b17ed3c16ec95f8f5fdb3e39a8a939d30823a7663bf81197", 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-027d1f732b7f5552)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test record::tests::queue_commit ... ok
[INFO] [stdout] test timeline::tests::limit ... ok
[INFO] [stdout] test record::tests::annul ... ok
[INFO] [stdout] test history::tests::go_to ... ok
[INFO] [stdout] test record::tests::checkpoint_commit ... ok
[INFO] [stdout] test record::tests::checkpoint_cancel ... ok
[INFO] [stdout] test record::tests::checkpoint_saved ... ok
[INFO] [stderr]    Doc-tests undo
[INFO] [stdout] test record::tests::dyn_trait ... 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] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/timeline.rs - timeline::Timeline (line 26) ... FAILED
[INFO] [stdout] test src/record.rs - record::Queue (line 518) ... FAILED
[INFO] [stdout] test src/history.rs - history::History (line 24) ... 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/record.rs - record::Record (line 32) ... FAILED
[INFO] [stdout] test src/history.rs - history::Builder (line 443) ... ok
[INFO] [stdout] test src/record.rs - record::Builder (line 419) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[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 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/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/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/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 1.17s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "e560f0cb7de9ace1b17ed3c16ec95f8f5fdb3e39a8a939d30823a7663bf81197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e560f0cb7de9ace1b17ed3c16ec95f8f5fdb3e39a8a939d30823a7663bf81197", kill_on_drop: false }`
[INFO] [stdout] e560f0cb7de9ace1b17ed3c16ec95f8f5fdb3e39a8a939d30823a7663bf81197