[INFO] fetching crate mms-rs 2.0.0...
[INFO] testing mms-rs-2.0.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate mms-rs 2.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate mms-rs 2.0.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mms-rs 2.0.0
[INFO] tweaked toml for crates.io crate mms-rs 2.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mms-rs 2.0.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mms-rs 2.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2a46758ad69cef0a738fabb519be9050a8eabc3793dfb16b6f1df9d97f3cc1e
[INFO] running `Command { std: "docker" "start" "-a" "d2a46758ad69cef0a738fabb519be9050a8eabc3793dfb16b6f1df9d97f3cc1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2a46758ad69cef0a738fabb519be9050a8eabc3793dfb16b6f1df9d97f3cc1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2a46758ad69cef0a738fabb519be9050a8eabc3793dfb16b6f1df9d97f3cc1e", kill_on_drop: false }`
[INFO] [stdout] d2a46758ad69cef0a738fabb519be9050a8eabc3793dfb16b6f1df9d97f3cc1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86c023a8b0bcce3d6f2e3ebf8e410880591552fbca8f9986ac36eebbc9daa7f7
[INFO] running `Command { std: "docker" "start" "-a" "86c023a8b0bcce3d6f2e3ebf8e410880591552fbca8f9986ac36eebbc9daa7f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling libc v0.2.145
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling os_str_bytes v6.5.0
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stderr]    Compiling cbindgen v0.24.5
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling syn v2.0.18
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[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling tempfile v3.5.0
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling mms-rs v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.44s
[INFO] running `Command { std: "docker" "inspect" "86c023a8b0bcce3d6f2e3ebf8e410880591552fbca8f9986ac36eebbc9daa7f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86c023a8b0bcce3d6f2e3ebf8e410880591552fbca8f9986ac36eebbc9daa7f7", kill_on_drop: false }`
[INFO] [stdout] 86c023a8b0bcce3d6f2e3ebf8e410880591552fbca8f9986ac36eebbc9daa7f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70c9057d464d8a09c80927124e4b76067fdbbedbdcdbc269237a78cf9681bc7f
[INFO] running `Command { std: "docker" "start" "-a" "70c9057d464d8a09c80927124e4b76067fdbbedbdcdbc269237a78cf9681bc7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling mms-rs v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]  --> examples/minimal-bot.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Mouse::set_color(0, 0, &mms_rs::CellColor::DarkGreen)?;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]  --> examples/minimal-bot.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Mouse::set_text(0, 0, "abc")?;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]  --> examples/minimal-bot.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         if !Mouse::wall_left()? {
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `bool`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `bool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]  --> examples/minimal-bot.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             Mouse::turn_left()?;
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> examples/minimal-bot.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |         while Mouse::wall_front()? {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `bool`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `bool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> examples/minimal-bot.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             Mouse::turn_right()?;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> examples/minimal-bot.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Mouse::move_forward(None)?;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mms-rs` (example "minimal-bot") due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "70c9057d464d8a09c80927124e4b76067fdbbedbdcdbc269237a78cf9681bc7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70c9057d464d8a09c80927124e4b76067fdbbedbdcdbc269237a78cf9681bc7f", kill_on_drop: false }`
[INFO] [stdout] 70c9057d464d8a09c80927124e4b76067fdbbedbdcdbc269237a78cf9681bc7f