[INFO] fetching crate thermal_printer 0.1.1...
[INFO] testing thermal_printer-0.1.1 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-2
[INFO] extracting crate thermal_printer 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate thermal_printer 0.1.1
[INFO] finished tweaking crates.io crate thermal_printer 0.1.1
[INFO] tweaked toml for crates.io crate thermal_printer 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate thermal_printer 0.1.1 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages to latest compatible versions
[INFO] [stderr]       Adding embedded-hal v0.2.7 (available: v1.0.0)
[INFO] [stderr]       Adding nb v0.1.3 (available: v1.1.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05479ef4bce9bbb4163e6633b28158d4d698fb9699f03da6de0e9ae140eb1bbc
[INFO] running `Command { std: "docker" "start" "-a" "05479ef4bce9bbb4163e6633b28158d4d698fb9699f03da6de0e9ae140eb1bbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05479ef4bce9bbb4163e6633b28158d4d698fb9699f03da6de0e9ae140eb1bbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05479ef4bce9bbb4163e6633b28158d4d698fb9699f03da6de0e9ae140eb1bbc", kill_on_drop: false }`
[INFO] [stdout] 05479ef4bce9bbb4163e6633b28158d4d698fb9699f03da6de0e9ae140eb1bbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c060e1ab6dfacd297f09dcca4e0491a0475feb074859bb7fa671777793603f2b
[INFO] running `Command { std: "docker" "start" "-a" "c060e1ab6dfacd297f09dcca4e0491a0475feb074859bb7fa671777793603f2b", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling thermal_printer v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `dot_print_time` and `dot_feed_time` are never read
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ThermalPrinter<T> where T: serial::Write<u8> {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     dot_print_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     dot_feed_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ThermalPrinter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "c060e1ab6dfacd297f09dcca4e0491a0475feb074859bb7fa671777793603f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c060e1ab6dfacd297f09dcca4e0491a0475feb074859bb7fa671777793603f2b", kill_on_drop: false }`
[INFO] [stdout] c060e1ab6dfacd297f09dcca4e0491a0475feb074859bb7fa671777793603f2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f50bb2c9a90654273264854f0aa31429371967355297db2e97f6e862d09eb993
[INFO] running `Command { std: "docker" "start" "-a" "f50bb2c9a90654273264854f0aa31429371967355297db2e97f6e862d09eb993", kill_on_drop: false }`
[INFO] [stderr]    Compiling serial-core v0.4.0
[INFO] [stderr]    Compiling ioctl-rs v0.1.6
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stdout] warning: fields `dot_print_time` and `dot_feed_time` are never read
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ThermalPrinter<T> where T: serial::Write<u8> {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     dot_print_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     dot_feed_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ThermalPrinter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serial-unix v0.4.0
[INFO] [stderr]    Compiling serial v0.4.0
[INFO] [stderr]    Compiling serial-embedded-hal v0.1.2
[INFO] [stderr]    Compiling thermal_printer v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `dot_print_time` and `dot_feed_time` are never read
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ThermalPrinter<T> where T: serial::Write<u8> {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     dot_print_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 38 |     dot_feed_time: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ThermalPrinter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/unix.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     printer.configure(11, 120, 40);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let _ = printer.configure(11, 120, 40);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "f50bb2c9a90654273264854f0aa31429371967355297db2e97f6e862d09eb993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f50bb2c9a90654273264854f0aa31429371967355297db2e97f6e862d09eb993", kill_on_drop: false }`
[INFO] [stdout] f50bb2c9a90654273264854f0aa31429371967355297db2e97f6e862d09eb993
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ef2ebcac2c5ed7accf37f39b69141abef56446f00cad94af09f80066266698d9
[INFO] running `Command { std: "docker" "start" "-a" "ef2ebcac2c5ed7accf37f39b69141abef56446f00cad94af09f80066266698d9", kill_on_drop: false }`
[INFO] [stderr] warning: fields `dot_print_time` and `dot_feed_time` are never read
[INFO] [stderr]   --> src/lib.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct ThermalPrinter<T> where T: serial::Write<u8> {
[INFO] [stderr]    |            -------------- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 37 |     dot_print_time: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 38 |     dot_feed_time: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ThermalPrinter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `thermal_printer` (lib) generated 1 warning
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> examples/unix.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     printer.configure(11, 120, 40);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let _ = printer.configure(11, 120, 40);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `thermal_printer` (example "unix") generated 1 warning
[INFO] [stderr] warning: `thermal_printer` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/thermal_printer-df0462ecf1b44c72)
[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]    Doc-tests thermal_printer
[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] running `Command { std: "docker" "inspect" "ef2ebcac2c5ed7accf37f39b69141abef56446f00cad94af09f80066266698d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef2ebcac2c5ed7accf37f39b69141abef56446f00cad94af09f80066266698d9", kill_on_drop: false }`
[INFO] [stdout] ef2ebcac2c5ed7accf37f39b69141abef56446f00cad94af09f80066266698d9