[INFO] fetching crate octseq 0.5.2...
[INFO] checking octseq-0.5.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate octseq 0.5.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate octseq 0.5.2
[INFO] finished tweaking crates.io crate octseq 0.5.2
[INFO] tweaked toml for crates.io crate octseq 0.5.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate octseq 0.5.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding heapless v0.8.0 (available: v0.9.2)
[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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ef6b827ca73ba7c3d8386a1a6f5ae1670edb160ceec39a5ddc1d8ea4fba052d
[INFO] running `Command { std: "docker" "start" "-a" "3ef6b827ca73ba7c3d8386a1a6f5ae1670edb160ceec39a5ddc1d8ea4fba052d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ef6b827ca73ba7c3d8386a1a6f5ae1670edb160ceec39a5ddc1d8ea4fba052d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ef6b827ca73ba7c3d8386a1a6f5ae1670edb160ceec39a5ddc1d8ea4fba052d", kill_on_drop: false }`
[INFO] [stdout] 3ef6b827ca73ba7c3d8386a1a6f5ae1670edb160ceec39a5ddc1d8ea4fba052d
[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 -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] d5003f3b5c3ca43c4b9f6e21751b50f2ac73dc3250be42217062a667f1008451
[INFO] running `Command { std: "docker" "start" "-a" "d5003f3b5c3ca43c4b9f6e21751b50f2ac73dc3250be42217062a667f1008451", kill_on_drop: false }`
[INFO] [stderr]     Checking octseq v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Infallible>
[INFO] [stdout]    --> src/octets.rs:149:73
[INFO] [stdout]     |
[INFO] [stdout] 149 |       fn try_octets_from(source: &'a Source) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________________^
[INFO] [stdout] 150 | |         Ok(source.as_ref())
[INFO] [stdout] 151 | |     }
[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<&[u8], Infallible>
[INFO] [stdout]    --> src/octets.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         Ok(source.as_ref())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/octets.rs:161:69
[INFO] [stdout]     |
[INFO] [stdout] 161 |       fn try_octets_from(source: Source) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _____________________________________________________________________^
[INFO] [stdout] 162 | |         Ok(From::from(source))
[INFO] [stdout] 163 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/octets.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |         Ok(From::from(source))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `octseq` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Infallible>
[INFO] [stdout]    --> src/octets.rs:149:73
[INFO] [stdout]     |
[INFO] [stdout] 149 |       fn try_octets_from(source: &'a Source) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________________^
[INFO] [stdout] 150 | |         Ok(source.as_ref())
[INFO] [stdout] 151 | |     }
[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<&[u8], Infallible>
[INFO] [stdout]    --> src/octets.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         Ok(source.as_ref())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/octets.rs:161:69
[INFO] [stdout]     |
[INFO] [stdout] 161 |       fn try_octets_from(source: Source) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _____________________________________________________________________^
[INFO] [stdout] 162 | |         Ok(From::from(source))
[INFO] [stdout] 163 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/octets.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |         Ok(From::from(source))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `octseq` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "d5003f3b5c3ca43c4b9f6e21751b50f2ac73dc3250be42217062a667f1008451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5003f3b5c3ca43c4b9f6e21751b50f2ac73dc3250be42217062a667f1008451", kill_on_drop: false }`
[INFO] [stdout] d5003f3b5c3ca43c4b9f6e21751b50f2ac73dc3250be42217062a667f1008451
