[INFO] cloning repository https://github.com/dasisdormax/pngstd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dasisdormax/pngstd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdasisdormax%2Fpngstd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdasisdormax%2Fpngstd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81c830807d45fb7937bae68daa041c1dd9dffdc6
[INFO] checking dasisdormax/pngstd against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdasisdormax%2Fpngstd" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dasisdormax/pngstd
[INFO] finished tweaking git repo https://github.com/dasisdormax/pngstd
[INFO] tweaked toml for git repo https://github.com/dasisdormax/pngstd written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dasisdormax/pngstd 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 git repo https://github.com/dasisdormax/pngstd 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] bbcb9b3408f49719495440e7330ef4d8e0131759708d24016ec9d11e292aa8a8
[INFO] running `Command { std: "docker" "start" "-a" "bbcb9b3408f49719495440e7330ef4d8e0131759708d24016ec9d11e292aa8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbcb9b3408f49719495440e7330ef4d8e0131759708d24016ec9d11e292aa8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbcb9b3408f49719495440e7330ef4d8e0131759708d24016ec9d11e292aa8a8", kill_on_drop: false }`
[INFO] [stdout] bbcb9b3408f49719495440e7330ef4d8e0131759708d24016ec9d11e292aa8a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 515adbf6953995a68bddd2a602688730b12728661341b124dca4ad0458bd42c0
[INFO] running `Command { std: "docker" "start" "-a" "515adbf6953995a68bddd2a602688730b12728661341b124dca4ad0458bd42c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling zstd-safe v4.1.4+zstd.1.5.2
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling crc32fast v1.3.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling zstd-sys v1.6.3+zstd.1.5.2
[INFO] [stderr]    Compiling clap_derive v3.0.14
[INFO] [stderr]     Checking clap v3.0.14
[INFO] [stderr]     Checking zstd v0.10.0+zstd.1.5.2
[INFO] [stderr]     Checking pngstd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]  --> src/util/png.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::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: `std::fs::File`
[INFO] [stdout]  --> src/util/png.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]  --> src/util/png.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::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: `std::fs::File`
[INFO] [stdout]  --> src/util/png.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/util/png.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn transform_noop(info: &ChunkInfo, buf: Vec<u8>) -> io::Result<Option<Vec<u8>>> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/util/png.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn transform_noop(info: &ChunkInfo, buf: Vec<u8>) -> io::Result<Option<Vec<u8>>> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transform_noop` is never used
[INFO] [stdout]   --> src/util/png.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn transform_noop(info: &ChunkInfo, buf: Vec<u8>) -> io::Result<Option<Vec<u8>>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_plain` is never used
[INFO] [stdout]    --> src/util/png.rs:250:8
[INFO] [stdout]     |
[INFO] [stdout] 250 | pub fn copy_plain<R: Read, W: Write>(reader: &mut R, writer: &mut W) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transform_noop` is never used
[INFO] [stdout]   --> src/util/png.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn transform_noop(info: &ChunkInfo, buf: Vec<u8>) -> io::Result<Option<Vec<u8>>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_plain` is never used
[INFO] [stdout]    --> src/util/png.rs:250:8
[INFO] [stdout]     |
[INFO] [stdout] 250 | pub fn copy_plain<R: Read, W: Write>(reader: &mut R, writer: &mut W) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/util/args.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | /     /** The input file name */
[INFO] [stdout] 7 | |     input_file_name: 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/util/args.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     /** The output file name. If unset, an appropriate suffix is added to the input file name. */
[INFO] [stdout] 10 | |     output_file_name: Option<String>,
[INFO] [stdout]    | |____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/util/args.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | /     /** The input file name */
[INFO] [stdout] 7 | |     input_file_name: 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/util/args.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     /** The output file name. If unset, an appropriate suffix is added to the input file name. */
[INFO] [stdout] 10 | |     output_file_name: Option<String>,
[INFO] [stdout]    | |____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngstd` (bin "pngstd" test) due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `pngstd` (bin "pngstd") due to 2 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "515adbf6953995a68bddd2a602688730b12728661341b124dca4ad0458bd42c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "515adbf6953995a68bddd2a602688730b12728661341b124dca4ad0458bd42c0", kill_on_drop: false }`
[INFO] [stdout] 515adbf6953995a68bddd2a602688730b12728661341b124dca4ad0458bd42c0
