[INFO] fetching crate stm32-uart-loader 0.1.2...
[INFO] checking stm32-uart-loader-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate stm32-uart-loader 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate stm32-uart-loader 0.1.2
[INFO] finished tweaking crates.io crate stm32-uart-loader 0.1.2
[INFO] tweaked toml for crates.io crate stm32-uart-loader 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stm32-uart-loader 0.1.2 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stm32-uart-loader 0.1.2 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 596eab6849c8e97f0b5d27b7f71091823c716b91819705e2c25d5eb1959042f7
[INFO] running `Command { std: "docker" "start" "-a" "596eab6849c8e97f0b5d27b7f71091823c716b91819705e2c25d5eb1959042f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "596eab6849c8e97f0b5d27b7f71091823c716b91819705e2c25d5eb1959042f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596eab6849c8e97f0b5d27b7f71091823c716b91819705e2c25d5eb1959042f7", kill_on_drop: false }`
[INFO] [stdout] 596eab6849c8e97f0b5d27b7f71091823c716b91819705e2c25d5eb1959042f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f181be0447d6897d2c6e854b941c9c92aff70059a82e9260333f148376a3b6e
[INFO] running `Command { std: "docker" "start" "-a" "5f181be0447d6897d2c6e854b941c9c92aff70059a82e9260333f148376a3b6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking simplelog v0.9.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking sysfs_gpio v0.5.4
[INFO] [stderr]     Checking spidev v0.4.0
[INFO] [stderr]     Checking i2cdev v0.4.4
[INFO] [stderr]     Checking console v0.14.0
[INFO] [stderr]     Checking bytefmt v0.1.7
[INFO] [stderr]     Checking linux-embedded-hal v0.3.0
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking stm32-uart-loader v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     /// Serial port to connect to
[INFO] [stdout] 21 | |     #[structopt(long, default_value = "/dev/ttyUSB0")]
[INFO] [stdout] 22 | |     port: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | /         /// File to read data into
[INFO] [stdout] 46 | |         #[structopt(long)]
[INFO] [stdout] 47 | |         file: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | /         /// File to read data from
[INFO] [stdout] 55 | |         #[structopt(long)]
[INFO] [stdout] 56 | |         file: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stm32-uart-loader` (bin "stm32-uart-loader") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     /// Serial port to connect to
[INFO] [stdout] 21 | |     #[structopt(long, default_value = "/dev/ttyUSB0")]
[INFO] [stdout] 22 | |     port: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | /         /// File to read data into
[INFO] [stdout] 46 | |         #[structopt(long)]
[INFO] [stdout] 47 | |         file: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | /         /// File to read data from
[INFO] [stdout] 55 | |         #[structopt(long)]
[INFO] [stdout] 56 | |         file: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stm32-uart-loader` (bin "stm32-uart-loader" test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "5f181be0447d6897d2c6e854b941c9c92aff70059a82e9260333f148376a3b6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f181be0447d6897d2c6e854b941c9c92aff70059a82e9260333f148376a3b6e", kill_on_drop: false }`
[INFO] [stdout] 5f181be0447d6897d2c6e854b941c9c92aff70059a82e9260333f148376a3b6e
