[INFO] fetching crate chainerror 0.7.0...
[INFO] testing chainerror-0.7.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate chainerror 0.7.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate chainerror 0.7.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chainerror 0.7.0
[INFO] finished tweaking crates.io crate chainerror 0.7.0
[INFO] tweaked toml for crates.io crate chainerror 0.7.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate chainerror 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bcfe60dad21f28ce1e4ee22d493f45cb4a94c9a3ad1406d833028946045b6b0
[INFO] running `Command { std: "docker" "start" "-a" "3bcfe60dad21f28ce1e4ee22d493f45cb4a94c9a3ad1406d833028946045b6b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bcfe60dad21f28ce1e4ee22d493f45cb4a94c9a3ad1406d833028946045b6b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bcfe60dad21f28ce1e4ee22d493f45cb4a94c9a3ad1406d833028946045b6b0", kill_on_drop: false }`
[INFO] [stdout] 3bcfe60dad21f28ce1e4ee22d493f45cb4a94c9a3ad1406d833028946045b6b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ea1717f2daee89e28b3812e61cde4284526ac78ea8f95bd812306989c808aae
[INFO] running `Command { std: "docker" "start" "-a" "6ea1717f2daee89e28b3812e61cde4284526ac78ea8f95bd812306989c808aae", kill_on_drop: false }`
[INFO] [stderr]    Compiling chainerror v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:32
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(<dyn Error>::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:223:25
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(<dyn Error>::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "6ea1717f2daee89e28b3812e61cde4284526ac78ea8f95bd812306989c808aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ea1717f2daee89e28b3812e61cde4284526ac78ea8f95bd812306989c808aae", kill_on_drop: false }`
[INFO] [stdout] 6ea1717f2daee89e28b3812e61cde4284526ac78ea8f95bd812306989c808aae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ea085757834a19919530c6a1bacbaeb1163b42f8ab994b42ac6a45d78f044da
[INFO] running `Command { std: "docker" "start" "-a" "4ea085757834a19919530c6a1bacbaeb1163b42f8ab994b42ac6a45d78f044da", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:32
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(<dyn Error>::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:223:25
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(<dyn Error>::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling chainerror v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/test_iter.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |         .filter_map(Error::downcast_ref::<io::Error>)
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 |         .filter_map(<dyn Error>::downcast_ref::<io::Error>)
[INFO] [stdout]    |                     ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/test_iter.rs:91:53
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let io_error: Option<&io::Error> = err.and_then(Error::downcast_ref::<io::Error>);
[INFO] [stdout]    |                                                     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let io_error: Option<&io::Error> = err.and_then(<dyn Error>::downcast_ref::<io::Error>);
[INFO] [stdout]    |                                                     ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:32
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(<dyn Error>::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:223:25
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(<dyn Error>::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ++++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "4ea085757834a19919530c6a1bacbaeb1163b42f8ab994b42ac6a45d78f044da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ea085757834a19919530c6a1bacbaeb1163b42f8ab994b42ac6a45d78f044da", kill_on_drop: false }`
[INFO] [stdout] 4ea085757834a19919530c6a1bacbaeb1163b42f8ab994b42ac6a45d78f044da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 30452adc73f88e833ef17a6df59a8b638a6040f4b8c233082339e2a5b3138176
[INFO] running `Command { std: "docker" "start" "-a" "30452adc73f88e833ef17a6df59a8b638a6040f4b8c233082339e2a5b3138176", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:201:32
[INFO] [stderr]     |
[INFO] [stderr] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stderr]     |                                ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 201 |         self.iter().filter_map(<dyn Error>::downcast_ref::<U>).next()
[INFO] [stderr]     |                                ++++      +
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:223:25
[INFO] [stderr]     |
[INFO] [stderr] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stderr]     |                         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 223 |             .filter_map(<dyn Error>::downcast_ref::<ChainError<U>>)
[INFO] [stderr]     |                         ++++      +
[INFO] [stderr] 
[INFO] [stderr] warning: `chainerror` (lib) generated 2 warnings
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/test_iter.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 |         .filter_map(Error::downcast_ref::<io::Error>)
[INFO] [stderr]    |                     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 27 |         .filter_map(<dyn Error>::downcast_ref::<io::Error>)
[INFO] [stderr]    |                     ++++      +
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/test_iter.rs:91:53
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let io_error: Option<&io::Error> = err.and_then(Error::downcast_ref::<io::Error>);
[INFO] [stderr]    |                                                     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let io_error: Option<&io::Error> = err.and_then(<dyn Error>::downcast_ref::<io::Error>);
[INFO] [stderr]    |                                                     ++++      +
[INFO] [stderr] 
[INFO] [stderr] warning: `chainerror` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: `chainerror` (test "test_iter") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.20s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/chainerror-67a11852301a3458)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test_iter.rs (/opt/rustwide/target/debug/deps/test_iter-36d5cc420618e08c)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_find_cause ... ok
[INFO] [stdout] test test_root_cause ... ok
[INFO] [stdout] test test_iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests chainerror
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - derive_err_kind (line 745) ... ok
[INFO] [stdout] test src/lib.rs - ChainError<T>::find_chain_cause (line 210) ... ok
[INFO] [stdout] test src/lib.rs - (line 6) ... ok
[INFO] [stdout] test src/lib.rs - ChainError<T>::find_kind_or_cause (line 233) ... ok
[INFO] [stdout] test src/lib.rs - (line 41) ... ok
[INFO] [stdout] test src/lib.rs - ChainError<T>::kind (line 262) ... ok
[INFO] [stdout] test src/lib.rs - derive_str_context (line 682) ... ok
[INFO] [stdout] test src/lib.rs - ChainError<T>::find_cause (line 160) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.38s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "30452adc73f88e833ef17a6df59a8b638a6040f4b8c233082339e2a5b3138176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30452adc73f88e833ef17a6df59a8b638a6040f4b8c233082339e2a5b3138176", kill_on_drop: false }`
[INFO] [stdout] 30452adc73f88e833ef17a6df59a8b638a6040f4b8c233082339e2a5b3138176