[INFO] fetching crate byte-chisel 0.1.0...
[INFO] checking byte-chisel-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate byte-chisel 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate byte-chisel 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate byte-chisel 0.1.0
[INFO] tweaked toml for crates.io crate byte-chisel 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate byte-chisel 0.1.0 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 crates.io crate byte-chisel 0.1.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 58f0586275f710b4c2e248f49a37dfc5dd57819b70129bc676463c5dc1449e1c
[INFO] running `Command { std: "docker" "start" "-a" "58f0586275f710b4c2e248f49a37dfc5dd57819b70129bc676463c5dc1449e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58f0586275f710b4c2e248f49a37dfc5dd57819b70129bc676463c5dc1449e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58f0586275f710b4c2e248f49a37dfc5dd57819b70129bc676463c5dc1449e1c", kill_on_drop: false }`
[INFO] [stdout] 58f0586275f710b4c2e248f49a37dfc5dd57819b70129bc676463c5dc1449e1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 38ee4a5f7b906d91b912a9a270dbcb7f258c972f30a8d3f66b65ae316ccb87cd
[INFO] running `Command { std: "docker" "start" "-a" "38ee4a5f7b906d91b912a9a270dbcb7f258c972f30a8d3f66b65ae316ccb87cd", kill_on_drop: false }`
[INFO] [stderr]     Checking byte-chisel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:165:23
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn little_endian(&mut self) -> ChiselLittleEndian<S> { ChiselLittleEndian(self) }
[INFO] [stdout]     |                          ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn little_endian(&mut self) -> ChiselLittleEndian<'_, S> { ChiselLittleEndian(self) }
[INFO] [stdout]     |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:168:20
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn big_endian(&mut self) -> ChiselBigEndian<S> { ChiselBigEndian(self) }
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn big_endian(&mut self) -> ChiselBigEndian<'_, S> { ChiselBigEndian(self) }
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:89:101
[INFO] [stdout]     |
[INFO] [stdout]  89 |       fn read_until(&mut self, byte: u8, into: &mut Vec<u8>) -> Result<ReadUntilStopReason, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________________________________________^
[INFO] [stdout]  90 | |         match memchr::memchr(byte, self) {
[INFO] [stdout]  91 | |             Some(x) => {
[INFO] [stdout]  92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout] ...   |
[INFO] [stdout] 102 | |     }
[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<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:90:3
[INFO] [stdout]     |
[INFO] [stdout]  90 | /         match memchr::memchr(byte, self) {
[INFO] [stdout]  91 | |             Some(x) => {
[INFO] [stdout]  92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout]  93 | |                 *self = self.get(x + 1..).unwrap_or(&[]);
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:91:15
[INFO] [stdout]    |
[INFO] [stdout] 91 |               Some(x) => {
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout] 93 | |                 *self = self.get(x + 1..).unwrap_or(&[]);
[INFO] [stdout] 94 | |                 Ok(ReadUntilStopReason::Delimiter)
[INFO] [stdout] 95 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 Ok(ReadUntilStopReason::Delimiter)
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:96:12
[INFO] [stdout]     |
[INFO] [stdout]  96 |               None => {
[INFO] [stdout]     |  _____________________^
[INFO] [stdout]  97 | |                 into.extend_from_slice(self);
[INFO] [stdout]  98 | |                 *self = &[];
[INFO] [stdout]  99 | |                 Ok(ReadUntilStopReason::EndOfInput)
[INFO] [stdout] 100 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 Ok(ReadUntilStopReason::EndOfInput)
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `byte-chisel` (lib) due to 6 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:165:23
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn little_endian(&mut self) -> ChiselLittleEndian<S> { ChiselLittleEndian(self) }
[INFO] [stdout]     |                          ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn little_endian(&mut self) -> ChiselLittleEndian<'_, S> { ChiselLittleEndian(self) }
[INFO] [stdout]     |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:168:20
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn big_endian(&mut self) -> ChiselBigEndian<S> { ChiselBigEndian(self) }
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn big_endian(&mut self) -> ChiselBigEndian<'_, S> { ChiselBigEndian(self) }
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:89:101
[INFO] [stdout]     |
[INFO] [stdout]  89 |       fn read_until(&mut self, byte: u8, into: &mut Vec<u8>) -> Result<ReadUntilStopReason, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________________________________________^
[INFO] [stdout]  90 | |         match memchr::memchr(byte, self) {
[INFO] [stdout]  91 | |             Some(x) => {
[INFO] [stdout]  92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout] ...   |
[INFO] [stdout] 102 | |     }
[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<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:90:3
[INFO] [stdout]     |
[INFO] [stdout]  90 | /         match memchr::memchr(byte, self) {
[INFO] [stdout]  91 | |             Some(x) => {
[INFO] [stdout]  92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout]  93 | |                 *self = self.get(x + 1..).unwrap_or(&[]);
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:91:15
[INFO] [stdout]    |
[INFO] [stdout] 91 |               Some(x) => {
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 92 | |                 into.extend_from_slice(&self[0..x]);
[INFO] [stdout] 93 | |                 *self = self.get(x + 1..).unwrap_or(&[]);
[INFO] [stdout] 94 | |                 Ok(ReadUntilStopReason::Delimiter)
[INFO] [stdout] 95 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 Ok(ReadUntilStopReason::Delimiter)
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]    --> src/source.rs:96:12
[INFO] [stdout]     |
[INFO] [stdout]  96 |               None => {
[INFO] [stdout]     |  _____________________^
[INFO] [stdout]  97 | |                 into.extend_from_slice(self);
[INFO] [stdout]  98 | |                 *self = &[];
[INFO] [stdout]  99 | |                 Ok(ReadUntilStopReason::EndOfInput)
[INFO] [stdout] 100 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ReadUntilStopReason, Infallible>
[INFO] [stdout]   --> src/source.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 Ok(ReadUntilStopReason::EndOfInput)
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `byte-chisel` (lib test) due to 6 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "38ee4a5f7b906d91b912a9a270dbcb7f258c972f30a8d3f66b65ae316ccb87cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38ee4a5f7b906d91b912a9a270dbcb7f258c972f30a8d3f66b65ae316ccb87cd", kill_on_drop: false }`
[INFO] [stdout] 38ee4a5f7b906d91b912a9a270dbcb7f258c972f30a8d3f66b65ae316ccb87cd