[INFO] fetching crate serial-rs 0.2.1...
[INFO] testing serial-rs-0.2.1 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate serial-rs 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate serial-rs 0.2.1
[INFO] finished tweaking crates.io crate serial-rs 0.2.1
[INFO] tweaked toml for crates.io crate serial-rs 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serial-rs 0.2.1 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serial-rs 0.2.1 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a63a0fd1da5c13fd9a6d6fb333bfd1ca9fea097bbf3e12509a07086056d6ac9
[INFO] running `Command { std: "docker" "start" "-a" "6a63a0fd1da5c13fd9a6d6fb333bfd1ca9fea097bbf3e12509a07086056d6ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a63a0fd1da5c13fd9a6d6fb333bfd1ca9fea097bbf3e12509a07086056d6ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a63a0fd1da5c13fd9a6d6fb333bfd1ca9fea097bbf3e12509a07086056d6ac9", kill_on_drop: false }`
[INFO] [stdout] 6a63a0fd1da5c13fd9a6d6fb333bfd1ca9fea097bbf3e12509a07086056d6ac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f781680ae7fe8cd38c33bfa54796089d39725424fc30a0eb66ab0c526fde123
[INFO] running `Command { std: "docker" "start" "-a" "8f781680ae7fe8cd38c33bfa54796089d39725424fc30a0eb66ab0c526fde123", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling serial-rs v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> src/posix/ioctl.rs:4:99
[INFO] [stdout]   |
[INFO] [stdout] 4 | use nix::{ioctl_none_bad, libc, ioctl_read_bad, ioctl_write_ptr_bad, ioctl_read, ioctl_write_ptr, Result};
[INFO] [stdout]   |                                                                                                   ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/posix/port_lister.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut pat: Vec<PathBuf> = get_paths("/dev/ttyS*").into_iter()
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/posix/port_lister.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     f.read_to_string(&mut s);
[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] 52 |                     let _ = f.read_to_string(&mut s);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "8f781680ae7fe8cd38c33bfa54796089d39725424fc30a0eb66ab0c526fde123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f781680ae7fe8cd38c33bfa54796089d39725424fc30a0eb66ab0c526fde123", kill_on_drop: false }`
[INFO] [stdout] 8f781680ae7fe8cd38c33bfa54796089d39725424fc30a0eb66ab0c526fde123
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a88d7b503d097f105df6d96d6f2d221fe877f91f78920774185660496f54fab
[INFO] running `Command { std: "docker" "start" "-a" "7a88d7b503d097f105df6d96d6f2d221fe877f91f78920774185660496f54fab", kill_on_drop: false }`
[INFO] [stderr]    Compiling serial-rs v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> src/posix/ioctl.rs:4:99
[INFO] [stdout]   |
[INFO] [stdout] 4 | use nix::{ioctl_none_bad, libc, ioctl_read_bad, ioctl_write_ptr_bad, ioctl_read, ioctl_write_ptr, Result};
[INFO] [stdout]   |                                                                                                   ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/posix/port_lister.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut pat: Vec<PathBuf> = get_paths("/dev/ttyS*").into_iter()
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/posix/port_lister.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     f.read_to_string(&mut s);
[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] 52 |                     let _ = f.read_to_string(&mut s);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufWriter` and `Read`
[INFO] [stdout]  --> examples/port_list.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Read, BufReader, BufRead, Write, BufWriter};
[INFO] [stdout]   |               ^^^^                             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> src/posix/ioctl.rs:4:99
[INFO] [stdout]   |
[INFO] [stdout] 4 | use nix::{ioctl_none_bad, libc, ioctl_read_bad, ioctl_write_ptr_bad, ioctl_read, ioctl_write_ptr, Result};
[INFO] [stdout]   |                                                                                                   ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/posix/port_lister.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut pat: Vec<PathBuf> = get_paths("/dev/ttyS*").into_iter()
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/posix/port_lister.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     f.read_to_string(&mut s);
[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] 52 |                     let _ = f.read_to_string(&mut s);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "7a88d7b503d097f105df6d96d6f2d221fe877f91f78920774185660496f54fab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a88d7b503d097f105df6d96d6f2d221fe877f91f78920774185660496f54fab", kill_on_drop: false }`
[INFO] [stdout] 7a88d7b503d097f105df6d96d6f2d221fe877f91f78920774185660496f54fab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cc1be646ad0022e6c7432cecf859af910c645f376e7bc4a2b2c5610e5bc6cd4c
[INFO] running `Command { std: "docker" "start" "-a" "cc1be646ad0022e6c7432cecf859af910c645f376e7bc4a2b2c5610e5bc6cd4c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Result`
[INFO] [stderr]  --> src/posix/ioctl.rs:4:99
[INFO] [stderr]   |
[INFO] [stderr] 4 | use nix::{ioctl_none_bad, libc, ioctl_read_bad, ioctl_write_ptr_bad, ioctl_read, ioctl_write_ptr, Result};
[INFO] [stderr]   |                                                                                                   ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/posix/port_lister.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let mut pat: Vec<PathBuf> = get_paths("/dev/ttyS*").into_iter()
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/posix/port_lister.rs:52:21
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     f.read_to_string(&mut s);
[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] 52 |                     let _ = f.read_to_string(&mut s);
[INFO] [stderr]    |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `serial-rs` (lib) generated 3 warnings (run `cargo fix --lib -p serial-rs` to apply 2 suggestions)
[INFO] [stderr] warning: `serial-rs` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr] warning: unused imports: `BufWriter` and `Read`
[INFO] [stderr]  --> examples/port_list.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Read, BufReader, BufRead, Write, BufWriter};
[INFO] [stderr]   |               ^^^^                             ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `serial-rs` (example "port_list") generated 1 warning (run `cargo fix --example "port_list" -p serial-rs` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serial_rs-2620a3d8a5007a7b)
[INFO] [stderr]    Doc-tests serial_rs
[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] [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" "cc1be646ad0022e6c7432cecf859af910c645f376e7bc4a2b2c5610e5bc6cd4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc1be646ad0022e6c7432cecf859af910c645f376e7bc4a2b2c5610e5bc6cd4c", kill_on_drop: false }`
[INFO] [stdout] cc1be646ad0022e6c7432cecf859af910c645f376e7bc4a2b2c5610e5bc6cd4c
