[INFO] fetching crate chd 0.2.3...
[INFO] checking chd-0.2.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate chd 0.2.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate chd 0.2.3 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chd 0.2.3
[INFO] finished tweaking crates.io crate chd 0.2.3
[INFO] tweaked toml for crates.io crate chd 0.2.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages
[INFO] [stderr]       Adding macro_rules_attribute v0.1.3 (latest: v0.2.0)
[INFO] [stderr]       Adding macro_rules_attribute-proc_macro v0.1.3 (latest: v0.2.0)
[INFO] [stderr]       Adding num-derive v0.3.3 (latest: v0.4.2)
[INFO] [stderr]       Adding polonius-the-crab v0.2.1 (latest: v0.4.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded text_io v0.1.12
[INFO] [stderr]   Downloaded macro_rules_attribute-proc_macro v0.1.3
[INFO] [stderr]   Downloaded macro_rules_attribute v0.1.3
[INFO] [stderr]   Downloaded lending-iterator v0.1.7
[INFO] [stderr]   Downloaded lending-iterator-proc_macros v0.1.7
[INFO] [stderr]   Downloaded crc-catalog v2.4.0
[INFO] [stderr]   Downloaded extension-traits v1.0.1
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded bitreader v0.3.8
[INFO] [stderr]   Downloaded claxon v0.4.3
[INFO] [stderr]   Downloaded ext-trait-proc_macros v1.0.1
[INFO] [stderr]   Downloaded ext-trait v1.0.1
[INFO] [stderr]   Downloaded never-say-never v6.6.666
[INFO] [stderr]   Downloaded polonius-the-crab v0.2.1
[INFO] [stderr]   Downloaded lzma-rs-perf-exp v0.2.1
[INFO] [stderr]   Downloaded nougat-proc_macros v0.2.4
[INFO] [stderr]   Downloaded nougat v0.2.4
[INFO] [stderr]   Downloaded libz-ng-sys v1.1.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d5b0836ba39cdd4ea689fe637be8b9c335105d06746311e01a636a6a7442004
[INFO] running `Command { std: "docker" "start" "-a" "0d5b0836ba39cdd4ea689fe637be8b9c335105d06746311e01a636a6a7442004", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d5b0836ba39cdd4ea689fe637be8b9c335105d06746311e01a636a6a7442004", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d5b0836ba39cdd4ea689fe637be8b9c335105d06746311e01a636a6a7442004", kill_on_drop: false }`
[INFO] [stdout] 0d5b0836ba39cdd4ea689fe637be8b9c335105d06746311e01a636a6a7442004
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b548a565eb522b9dc2bf2801bedcc30bdfc56869e7607b048e5da9746e43743e
[INFO] running `Command { std: "docker" "start" "-a" "b548a565eb522b9dc2bf2801bedcc30bdfc56869e7607b048e5da9746e43743e", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking bitreader v0.3.8
[INFO] [stderr]     Checking text_io v0.1.12
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking lzma-rs-perf-exp v0.2.1
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking chd v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/compression/cdrom.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::convert::TryFrom;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/map.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `const_assert` is imported redundantly
[INFO] [stdout]    --> src/map.rs:11:5
[INFO] [stdout]     |
[INFO] [stdout] 11  |   use crate::const_assert;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | / macro_rules! const_assert {
[INFO] [stdout] 125 | |     ($($list:ident : $ty:ty),* => $expr:expr) => {{
[INFO] [stdout] 126 | |         struct Assert<$(const $list: $ty,)*>;
[INFO] [stdout] 127 | |         impl<$(const $list: $ty,)*> Assert<$($list,)*> {
[INFO] [stdout] ...   |
[INFO] [stdout] 134 | |     };
[INFO] [stdout] 135 | | }
[INFO] [stdout]     | |_- the item `const_assert` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/compression/cdrom.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::convert::TryFrom;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/map.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `const_assert` is imported redundantly
[INFO] [stdout]    --> src/map.rs:11:5
[INFO] [stdout]     |
[INFO] [stdout] 11  |   use crate::const_assert;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | / macro_rules! const_assert {
[INFO] [stdout] 125 | |     ($($list:ident : $ty:ty),* => $expr:expr) => {{
[INFO] [stdout] 126 | |         struct Assert<$(const $list: $ty,)*>;
[INFO] [stdout] 127 | |         impl<$(const $list: $ty,)*> Assert<$($list,)*> {
[INFO] [stdout] ...   |
[INFO] [stdout] 134 | |     };
[INFO] [stdout] 135 | | }
[INFO] [stdout]     | |_- the item `const_assert` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     use std::convert::TryInto;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `codec_type` is never used
[INFO] [stdout]   --> src/compression/mod.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub trait CompressionCodecType {
[INFO] [stdout]    |           -------------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn codec_type(&self) -> CodecType
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `clear_ecc` and `verify_ecc` are never used
[INFO] [stdout]    --> src/compression/ecc.rs:744:8
[INFO] [stdout]     |
[INFO] [stdout] 742 | pub(crate) trait ErrorCorrectedSector {
[INFO] [stdout]     |                  -------------------- methods in this trait
[INFO] [stdout] 743 |     /// Reset the ECC P and Q codes to 0 within a sector
[INFO] [stdout] 744 |     fn clear_ecc(&mut self);
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 750 |     fn verify_ecc(&self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chd`
[INFO] [stdout]    --> src/lib.rs:226:13
[INFO] [stdout]     |
[INFO] [stdout] 226 |         let chd = Chd::open(f, Some(Box::new(pchd))).expect("child");
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_chd`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:221:13
[INFO] [stdout]     |
[INFO] [stdout] 221 |         let mut p = BufReader::new(File::open(".testimages/TombRaider.chd").expect(""));
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:224:13
[INFO] [stdout]     |
[INFO] [stdout] 224 |         let mut f = BufReader::new(File::open(".testimages/TombRaiderR1.chd").expect(""));
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `codec_type` is never used
[INFO] [stdout]   --> src/compression/mod.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub trait CompressionCodecType {
[INFO] [stdout]    |           -------------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn codec_type(&self) -> CodecType
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `clear_ecc` and `verify_ecc` are never used
[INFO] [stdout]    --> src/compression/ecc.rs:744:8
[INFO] [stdout]     |
[INFO] [stdout] 742 | pub(crate) trait ErrorCorrectedSector {
[INFO] [stdout]     |                  -------------------- methods in this trait
[INFO] [stdout] 743 |     /// Reset the ECC P and Q codes to 0 within a sector
[INFO] [stdout] 744 |     fn clear_ecc(&mut self);
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 750 |     fn verify_ecc(&self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chd::read::HunkBufReader`
[INFO] [stdout]  --> benches/bench.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use chd::read::HunkBufReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::args`
[INFO] [stdout]  --> benches/bench.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::env::args;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "b548a565eb522b9dc2bf2801bedcc30bdfc56869e7607b048e5da9746e43743e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b548a565eb522b9dc2bf2801bedcc30bdfc56869e7607b048e5da9746e43743e", kill_on_drop: false }`
[INFO] [stdout] b548a565eb522b9dc2bf2801bedcc30bdfc56869e7607b048e5da9746e43743e