[INFO] fetching crate mlem 0.1.0...
[INFO] testing mlem-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mlem 0.1.0 into /workspace/builds/worker-66/source
[INFO] validating manifest of crates.io crate mlem 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mlem 0.1.0
[INFO] finished tweaking crates.io crate mlem 0.1.0
[INFO] tweaked toml for crates.io crate mlem 0.1.0 written to /workspace/builds/worker-66/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94858efbb20daf629641308f3bd4818e8aa59056a9104c6e2304866650ee0e96
[INFO] running `Command { std: "docker" "start" "-a" "94858efbb20daf629641308f3bd4818e8aa59056a9104c6e2304866650ee0e96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94858efbb20daf629641308f3bd4818e8aa59056a9104c6e2304866650ee0e96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94858efbb20daf629641308f3bd4818e8aa59056a9104c6e2304866650ee0e96", kill_on_drop: false }`
[INFO] [stdout] 94858efbb20daf629641308f3bd4818e8aa59056a9104c6e2304866650ee0e96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d29c719a006483bf0ef29af3ed781ff9616ac32523d9fc6c9bae44ed985d6a67
[INFO] running `Command { std: "docker" "start" "-a" "d29c719a006483bf0ef29af3ed781ff9616ac32523d9fc6c9bae44ed985d6a67", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling serde v0.9.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]    Compiling serde_cbor v0.5.2
[INFO] [stderr]    Compiling serde_derive v0.9.15
[INFO] [stderr]    Compiling mlem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:44:23
[INFO] [stdout]    |
[INFO] [stdout] 44 |     input: &'mach mut Read,
[INFO] [stdout]    |                       ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |     output: &'mach mut Write
[INFO] [stdout]    |                        ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:52
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:77
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.42s
[INFO] running `Command { std: "docker" "inspect" "d29c719a006483bf0ef29af3ed781ff9616ac32523d9fc6c9bae44ed985d6a67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d29c719a006483bf0ef29af3ed781ff9616ac32523d9fc6c9bae44ed985d6a67", kill_on_drop: false }`
[INFO] [stdout] d29c719a006483bf0ef29af3ed781ff9616ac32523d9fc6c9bae44ed985d6a67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00586331e1495992150103060d21b3b7068dad0812166b4d384f5107e73a0505
[INFO] running `Command { std: "docker" "start" "-a" "00586331e1495992150103060d21b3b7068dad0812166b4d384f5107e73a0505", kill_on_drop: false }`
[INFO] [stderr]    Compiling mlem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:44:23
[INFO] [stdout]    |
[INFO] [stdout] 44 |     input: &'mach mut Read,
[INFO] [stdout]    |                       ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |     output: &'mach mut Write
[INFO] [stdout]    |                        ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:52
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:77
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:44:23
[INFO] [stdout]    |
[INFO] [stdout] 44 |     input: &'mach mut Read,
[INFO] [stdout]    |                       ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |     output: &'mach mut Write
[INFO] [stdout]    |                        ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:52
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/machine.rs:51:77
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stdout]    |                                                                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "00586331e1495992150103060d21b3b7068dad0812166b4d384f5107e73a0505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00586331e1495992150103060d21b3b7068dad0812166b4d384f5107e73a0505", kill_on_drop: false }`
[INFO] [stdout] 00586331e1495992150103060d21b3b7068dad0812166b4d384f5107e73a0505
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f7216e900a7e724c4a50e4e08e02eb86ebb110588c0964294e4d66d83b75cf2b
[INFO] running `Command { std: "docker" "start" "-a" "f7216e900a7e724c4a50e4e08e02eb86ebb110588c0964294e4d66d83b75cf2b", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/machine.rs:44:23
[INFO] [stderr]    |
[INFO] [stderr] 44 |     input: &'mach mut Read,
[INFO] [stderr]    |                       ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/machine.rs:46:24
[INFO] [stderr]    |
[INFO] [stderr] 46 |     output: &'mach mut Write
[INFO] [stderr]    |                        ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/machine.rs:51:52
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stderr]    |                                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/machine.rs:51:77
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn new(max_words: usize, input: &'mach mut Read, output: &'mach mut Write) -> Self {
[INFO] [stderr]    |                                                                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `mlem` (lib) generated 4 warnings
[INFO] [stderr] warning: `mlem` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mlem-09ec1a0dc198ee5c)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mlem
[INFO] [stdout] running 10 tests
[INFO] [stdout] test test_machine::test_conditional_jump ... ok
[INFO] [stdout] test test_machine::test_get_set_memory ... ok
[INFO] [stdout] test test_machine::test_io_instructions ... ok
[INFO] [stdout] test test_instructions::test_cbor_serde ... ok
[INFO] [stdout] test test_machine::test_jump ... ok
[INFO] [stdout] test test_machine::test_pointer_memory_access ... ok
[INFO] [stdout] test test_machine::test_reg_instructions ... ok
[INFO] [stdout] test test_machine::test_run ... ok
[INFO] [stdout] test test_machine::test_scalar_arith ... ok
[INFO] [stdout] test test_machine::test_stack ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.67s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f7216e900a7e724c4a50e4e08e02eb86ebb110588c0964294e4d66d83b75cf2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7216e900a7e724c4a50e4e08e02eb86ebb110588c0964294e4d66d83b75cf2b", kill_on_drop: false }`
[INFO] [stdout] f7216e900a7e724c4a50e4e08e02eb86ebb110588c0964294e4d66d83b75cf2b