[INFO] fetching crate aci_png 0.8.0-pre0...
[INFO] checking aci_png-0.8.0-pre0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate aci_png 0.8.0-pre0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate aci_png 0.8.0-pre0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aci_png 0.8.0-pre0
[INFO] finished tweaking crates.io crate aci_png 0.8.0-pre0
[INFO] tweaked toml for crates.io crate aci_png 0.8.0-pre0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding deflate v0.7.20 (latest: v1.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded afi v0.8.0-pre0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16da2d55aabf3ca761084c71217e284ddc206574dd7ecd2e8d61901cf1779475
[INFO] running `Command { std: "docker" "start" "-a" "16da2d55aabf3ca761084c71217e284ddc206574dd7ecd2e8d61901cf1779475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16da2d55aabf3ca761084c71217e284ddc206574dd7ecd2e8d61901cf1779475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16da2d55aabf3ca761084c71217e284ddc206574dd7ecd2e8d61901cf1779475", kill_on_drop: false }`
[INFO] [stdout] 16da2d55aabf3ca761084c71217e284ddc206574dd7ecd2e8d61901cf1779475
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ec826d23e5b6f06911def92115ec39d65d513c46ca8cda61328e1ad9b9031b2
[INFO] running `Command { std: "docker" "start" "-a" "2ec826d23e5b6f06911def92115ec39d65d513c46ca8cda61328e1ad9b9031b2", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking afi v0.8.0-pre0
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking aci_png v0.8.0-pre0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/png.rs:159:15
[INFO] [stdout]     |
[INFO] [stdout] 159 |         fn from_f32(f32) -> Self;
[INFO] [stdout]     |                     ^^^ help: try naming the parameter or explicitly ignoring it: `_: f32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:224:2
[INFO] [stdout]     |
[INFO] [stdout] 224 |     try!(reader.read_exact(&mut buf));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:251:5
[INFO] [stdout]     |
[INFO] [stdout] 251 |     Ok(try!(read_chunks(reader, &[])).0)
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:261:16
[INFO] [stdout]     |
[INFO] [stdout] 261 |     let dc = &mut try!(init_decoder(reader, size_of::<T>() * 8));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:262:22
[INFO] [stdout]     |
[INFO] [stdout] 262 |     let (buf, chunks) = try!(decode(dc, chunk_names));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:266:10
[INFO] [stdout]     |
[INFO] [stdout] 266 |        buf: try!(buf.vec()),
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:273:12
[INFO] [stdout]     |
[INFO] [stdout] 273 |     let hdr = try!(read_header(reader));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:333:2
[INFO] [stdout]     |
[INFO] [stdout] 333 |     try!(dc.stream.read_exact(&mut dc.chunk_lentype[0..8]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:343:2
[INFO] [stdout]     |
[INFO] [stdout] 343 |     try!(dc.stream.read_exact(&mut tmp));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:361:16
[INFO] [stdout]     |
[INFO] [stdout] 361 |     let mut len = try!(read_chunkmeta(dc));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:372:14
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 result = try!(read_idat_stream(dc, &mut len, &palette[..]));
[INFO] [stdout]     |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 383 |                 try!(dc.stream.read_exact(&mut palette));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 |                 try!(readcheck_crc(dc));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:394:5
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 try!(dc.stream.read_exact(&mut crc));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:405:6
[INFO] [stdout]     |
[INFO] [stdout] 405 |                     try!(dc.stream.read_exact(&mut data));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:408:6
[INFO] [stdout]     |
[INFO] [stdout] 408 |                     try!(readcheck_crc(dc));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:411:6
[INFO] [stdout]     |
[INFO] [stdout] 411 |                     try!(dc.stream.seek(SeekFrom::Current(len as i64 + 4)));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:417:9
[INFO] [stdout]     |
[INFO] [stdout] 417 |         len = try!(read_chunkmeta(dc));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:476:35
[INFO] [stdout]     |
[INFO] [stdout] 476 |     let (convert8, _0, _1, _2, _3) = try!(converter::<u8>(dc.src_fmt, ColFmt::RGBA));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:477:36
[INFO] [stdout]     |
[INFO] [stdout] 477 |     let (convert16, c0, c1, c2, c3) = try!(converter::<u16>(dc.src_fmt, ColFmt::RGBA));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:479:24
[INFO] [stdout]     |
[INFO] [stdout] 479 |     let compressed_data = try!(read_idat_chunks(dc, len));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:498:5
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 try!(zlib.read_exact(&mut cline[..]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:501:5
[INFO] [stdout]     |
[INFO] [stdout] 501 |                 try!(recon(&mut cline[1..], &pline[1..], filter_type, filter_step));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:557:6
[INFO] [stdout]     |
[INFO] [stdout] 557 |                     try!(zlib.read_exact(&mut cline[..]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:560:6
[INFO] [stdout]     |
[INFO] [stdout] 560 |                     try!(recon(&mut cline[1..], &pline[1..], filter_type, filter_step));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/png.rs:665:12
[INFO] [stdout]     |
[INFO] [stdout] 665 |     -> Result<(Vec<u8>), Error>
[INFO] [stdout]     |               ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 665 -     -> Result<(Vec<u8>), Error>
[INFO] [stdout] 665 +     -> Result<Vec<u8>, Error>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:671:3
[INFO] [stdout]     |
[INFO] [stdout] 671 |         try!(dc.stream.read_exact(&mut all[start..]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:673:3
[INFO] [stdout]     |
[INFO] [stdout] 673 |         try!(readcheck_crc(dc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:674:10
[INFO] [stdout]     |
[INFO] [stdout] 674 |         *len = try!(read_chunkmeta(dc));    // next chunk's len and type
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:806:2
[INFO] [stdout]     |
[INFO] [stdout] 806 |     try!(write_header(ec));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:810:2
[INFO] [stdout]     |
[INFO] [stdout] 810 |     try!(write_image_data(ec));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:813:2
[INFO] [stdout]     |
[INFO] [stdout] 813 |     try!(ec.stream.write_all(iend));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:814:2
[INFO] [stdout]     |
[INFO] [stdout] 814 |     try!(ec.stream.flush());
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:808:3
[INFO] [stdout]     |
[INFO] [stdout] 808 |         try!(write_custom_chunk(ec, chunk));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:823:2
[INFO] [stdout]     |
[INFO] [stdout] 823 |     try!(ec.stream.write_all(&PNG_FILE_HEADER[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:824:2
[INFO] [stdout]     |
[INFO] [stdout] 824 |     try!(ec.stream.write_all(b"\0\0\0\x0dIHDR"));     crc.put(b"IHDR");
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:825:2
[INFO] [stdout]     |
[INFO] [stdout] 825 |     try!(ec.stream.write_all(width));                 crc.put(width);
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:826:2
[INFO] [stdout]     |
[INFO] [stdout] 826 |     try!(ec.stream.write_all(height));                crc.put(height);
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:835:2
[INFO] [stdout]     |
[INFO] [stdout] 835 |     try!(ec.stream.write_all(&tmp));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:838:2
[INFO] [stdout]     |
[INFO] [stdout] 838 |     try!(ec.stream.write_all(&crc.finish_be()[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:857:2
[INFO] [stdout]     |
[INFO] [stdout] 857 |     try!(ec.stream.write_all(&u32_to_be(chunk.data.len() as u32)[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:858:2
[INFO] [stdout]     |
[INFO] [stdout] 858 |     try!(ec.stream.write_all(&chunk.name[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:859:2
[INFO] [stdout]     |
[INFO] [stdout] 859 |     try!(ec.stream.write_all(&chunk.data[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:863:2
[INFO] [stdout]     |
[INFO] [stdout] 863 |     try!(ec.stream.write_all(&crc.finish_be()[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:877:34
[INFO] [stdout]     |
[INFO] [stdout] 877 |     let (convert, c0, c1, c2, c3) = try!(converter(ColFmt::RGBA, 
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:923:3
[INFO] [stdout]     |
[INFO] [stdout] 923 |         try!(ec.stream.write_all(&u32_to_be(n as u32)[..]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:924:3
[INFO] [stdout]     |
[INFO] [stdout] 924 |         try!(ec.stream.write_all(b"IDAT"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:925:3
[INFO] [stdout]     |
[INFO] [stdout] 925 |         try!(ec.stream.write_all(&compressed[..n]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:926:3
[INFO] [stdout]     |
[INFO] [stdout] 926 |         try!(ec.stream.write_all(crc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:918:11
[INFO] [stdout]     |
[INFO] [stdout] 918 |         let n = try!(compressed_data.read(&mut compressed[..]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/png.rs:159:15
[INFO] [stdout]     |
[INFO] [stdout] 159 |         fn from_f32(f32) -> Self;
[INFO] [stdout]     |                     ^^^ help: try naming the parameter or explicitly ignoring it: `_: f32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:224:2
[INFO] [stdout]     |
[INFO] [stdout] 224 |     try!(reader.read_exact(&mut buf));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:251:5
[INFO] [stdout]     |
[INFO] [stdout] 251 |     Ok(try!(read_chunks(reader, &[])).0)
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:261:16
[INFO] [stdout]     |
[INFO] [stdout] 261 |     let dc = &mut try!(init_decoder(reader, size_of::<T>() * 8));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:262:22
[INFO] [stdout]     |
[INFO] [stdout] 262 |     let (buf, chunks) = try!(decode(dc, chunk_names));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:266:10
[INFO] [stdout]     |
[INFO] [stdout] 266 |        buf: try!(buf.vec()),
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:273:12
[INFO] [stdout]     |
[INFO] [stdout] 273 |     let hdr = try!(read_header(reader));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:333:2
[INFO] [stdout]     |
[INFO] [stdout] 333 |     try!(dc.stream.read_exact(&mut dc.chunk_lentype[0..8]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:343:2
[INFO] [stdout]     |
[INFO] [stdout] 343 |     try!(dc.stream.read_exact(&mut tmp));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:361:16
[INFO] [stdout]     |
[INFO] [stdout] 361 |     let mut len = try!(read_chunkmeta(dc));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:372:14
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 result = try!(read_idat_stream(dc, &mut len, &palette[..]));
[INFO] [stdout]     |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 383 |                 try!(dc.stream.read_exact(&mut palette));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 |                 try!(readcheck_crc(dc));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:394:5
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 try!(dc.stream.read_exact(&mut crc));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:405:6
[INFO] [stdout]     |
[INFO] [stdout] 405 |                     try!(dc.stream.read_exact(&mut data));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:408:6
[INFO] [stdout]     |
[INFO] [stdout] 408 |                     try!(readcheck_crc(dc));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:411:6
[INFO] [stdout]     |
[INFO] [stdout] 411 |                     try!(dc.stream.seek(SeekFrom::Current(len as i64 + 4)));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:417:9
[INFO] [stdout]     |
[INFO] [stdout] 417 |         len = try!(read_chunkmeta(dc));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:476:35
[INFO] [stdout]     |
[INFO] [stdout] 476 |     let (convert8, _0, _1, _2, _3) = try!(converter::<u8>(dc.src_fmt, ColFmt::RGBA));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:477:36
[INFO] [stdout]     |
[INFO] [stdout] 477 |     let (convert16, c0, c1, c2, c3) = try!(converter::<u16>(dc.src_fmt, ColFmt::RGBA));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:479:24
[INFO] [stdout]     |
[INFO] [stdout] 479 |     let compressed_data = try!(read_idat_chunks(dc, len));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:498:5
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 try!(zlib.read_exact(&mut cline[..]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:501:5
[INFO] [stdout]     |
[INFO] [stdout] 501 |                 try!(recon(&mut cline[1..], &pline[1..], filter_type, filter_step));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:557:6
[INFO] [stdout]     |
[INFO] [stdout] 557 |                     try!(zlib.read_exact(&mut cline[..]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:560:6
[INFO] [stdout]     |
[INFO] [stdout] 560 |                     try!(recon(&mut cline[1..], &pline[1..], filter_type, filter_step));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/png.rs:116:29
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/png.rs:665:12
[INFO] [stdout]     |
[INFO] [stdout] 665 |     -> Result<(Vec<u8>), Error>
[INFO] [stdout]     |               ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 665 -     -> Result<(Vec<u8>), Error>
[INFO] [stdout] 665 +     -> Result<Vec<u8>, Error>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:671:3
[INFO] [stdout]     |
[INFO] [stdout] 671 |         try!(dc.stream.read_exact(&mut all[start..]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:673:3
[INFO] [stdout]     |
[INFO] [stdout] 673 |         try!(readcheck_crc(dc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:674:10
[INFO] [stdout]     |
[INFO] [stdout] 674 |         *len = try!(read_chunkmeta(dc));    // next chunk's len and type
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:806:2
[INFO] [stdout]     |
[INFO] [stdout] 806 |     try!(write_header(ec));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:810:2
[INFO] [stdout]     |
[INFO] [stdout] 810 |     try!(write_image_data(ec));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:813:2
[INFO] [stdout]     |
[INFO] [stdout] 813 |     try!(ec.stream.write_all(iend));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:814:2
[INFO] [stdout]     |
[INFO] [stdout] 814 |     try!(ec.stream.flush());
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:808:3
[INFO] [stdout]     |
[INFO] [stdout] 808 |         try!(write_custom_chunk(ec, chunk));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:823:2
[INFO] [stdout]     |
[INFO] [stdout] 823 |     try!(ec.stream.write_all(&PNG_FILE_HEADER[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:824:2
[INFO] [stdout]     |
[INFO] [stdout] 824 |     try!(ec.stream.write_all(b"\0\0\0\x0dIHDR"));     crc.put(b"IHDR");
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:825:2
[INFO] [stdout]     |
[INFO] [stdout] 825 |     try!(ec.stream.write_all(width));                 crc.put(width);
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:826:2
[INFO] [stdout]     |
[INFO] [stdout] 826 |     try!(ec.stream.write_all(height));                crc.put(height);
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:835:2
[INFO] [stdout]     |
[INFO] [stdout] 835 |     try!(ec.stream.write_all(&tmp));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:838:2
[INFO] [stdout]     |
[INFO] [stdout] 838 |     try!(ec.stream.write_all(&crc.finish_be()[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:857:2
[INFO] [stdout]     |
[INFO] [stdout] 857 |     try!(ec.stream.write_all(&u32_to_be(chunk.data.len() as u32)[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:858:2
[INFO] [stdout]     |
[INFO] [stdout] 858 |     try!(ec.stream.write_all(&chunk.name[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:859:2
[INFO] [stdout]     |
[INFO] [stdout] 859 |     try!(ec.stream.write_all(&chunk.data[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:863:2
[INFO] [stdout]     |
[INFO] [stdout] 863 |     try!(ec.stream.write_all(&crc.finish_be()[..]));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:877:34
[INFO] [stdout]     |
[INFO] [stdout] 877 |     let (convert, c0, c1, c2, c3) = try!(converter(ColFmt::RGBA, 
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:923:3
[INFO] [stdout]     |
[INFO] [stdout] 923 |         try!(ec.stream.write_all(&u32_to_be(n as u32)[..]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:924:3
[INFO] [stdout]     |
[INFO] [stdout] 924 |         try!(ec.stream.write_all(b"IDAT"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:925:3
[INFO] [stdout]     |
[INFO] [stdout] 925 |         try!(ec.stream.write_all(&compressed[..n]));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:926:3
[INFO] [stdout]     |
[INFO] [stdout] 926 |         try!(ec.stream.write_all(crc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/png.rs:918:11
[INFO] [stdout]     |
[INFO] [stdout] 918 |         let n = try!(compressed_data.read(&mut compressed[..]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/png.rs:116:29
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/png.rs:112:26
[INFO] [stdout]     |
[INFO] [stdout] 112 |             Error::Io(ref e) => e.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/png.rs:112:26
[INFO] [stdout]     |
[INFO] [stdout] 112 |             Error::Io(ref e) => e.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:86:14
[INFO] [stdout]    |
[INFO] [stdout] 86 |     InvalidData(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 86 |     InvalidData(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     InvalidArg(&'static str),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 87 |     InvalidArg(()),
[INFO] [stdout]    |                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:88:14
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Unsupported(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Unsupported(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:89:11
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Internal(&'static str),
[INFO] [stdout]    |     -------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Internal(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `zero`, `as_f32`, and `from_f32` are never used
[INFO] [stdout]    --> src/png.rs:156:6
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub trait Sample : Copy {
[INFO] [stdout]     |               ------ associated items in this trait
[INFO] [stdout] 156 |         fn zero() -> Self;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 157 |         fn max_value() -> Self;
[INFO] [stdout] 158 |         fn as_f32(self) -> f32;
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 159 |         fn from_f32(f32) -> Self;
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:86:14
[INFO] [stdout]    |
[INFO] [stdout] 86 |     InvalidData(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 86 |     InvalidData(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     InvalidArg(&'static str),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 87 |     InvalidArg(()),
[INFO] [stdout]    |                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 57 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:88:14
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Unsupported(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Unsupported(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/png.rs:89:11
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Internal(&'static str),
[INFO] [stdout]    |     -------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 89 |     Internal(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `zero`, `as_f32`, and `from_f32` are never used
[INFO] [stdout]    --> src/png.rs:156:6
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub trait Sample : Copy {
[INFO] [stdout]     |               ------ associated items in this trait
[INFO] [stdout] 156 |         fn zero() -> Self;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 157 |         fn max_value() -> Self;
[INFO] [stdout] 158 |         fn as_f32(self) -> f32;
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 159 |         fn from_f32(f32) -> Self;
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 57 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "2ec826d23e5b6f06911def92115ec39d65d513c46ca8cda61328e1ad9b9031b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ec826d23e5b6f06911def92115ec39d65d513c46ca8cda61328e1ad9b9031b2", kill_on_drop: false }`
[INFO] [stdout] 2ec826d23e5b6f06911def92115ec39d65d513c46ca8cda61328e1ad9b9031b2