[INFO] cloning repository https://github.com/mettke/rust_read_write_core_rfc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mettke/rust_read_write_core_rfc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmettke%2Frust_read_write_core_rfc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmettke%2Frust_read_write_core_rfc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8599ed3d8812608e6b0314017c77c3b8c997bf38
[INFO] checking mettke/rust_read_write_core_rfc against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmettke%2Frust_read_write_core_rfc" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mettke/rust_read_write_core_rfc on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mettke/rust_read_write_core_rfc
[INFO] finished tweaking git repo https://github.com/mettke/rust_read_write_core_rfc
[INFO] tweaked toml for git repo https://github.com/mettke/rust_read_write_core_rfc written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/mettke/rust_read_write_core_rfc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20b060d77a575d71a312b230f4bfbbde13217607e3f87e35c530a4db34ad7400
[INFO] running `Command { std: "docker" "start" "-a" "20b060d77a575d71a312b230f4bfbbde13217607e3f87e35c530a4db34ad7400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20b060d77a575d71a312b230f4bfbbde13217607e3f87e35c530a4db34ad7400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b060d77a575d71a312b230f4bfbbde13217607e3f87e35c530a4db34ad7400", kill_on_drop: false }`
[INFO] [stdout] 20b060d77a575d71a312b230f4bfbbde13217607e3f87e35c530a4db34ad7400
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd3e95fc9173b96d1e8968f3aa0ce4ae15a14538e467b85e12942078980854a4
[INFO] running `Command { std: "docker" "start" "-a" "bd3e95fc9173b96d1e8968f3aa0ce4ae15a14538e467b85e12942078980854a4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rw-poc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:150:33
[INFO] [stdout]     |
[INFO] [stdout] 150 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]     |                                 ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:150:33
[INFO] [stdout]     |
[INFO] [stdout] 150 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]     |                                 ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:150:16
[INFO] [stdout]     |
[INFO] [stdout] 150 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                        found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:150:16
[INFO] [stdout]     |
[INFO] [stdout] 150 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                        found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:156:38
[INFO] [stdout]     |
[INFO] [stdout] 156 |                     IoSlice::advance(bufs, n.get());
[INFO] [stdout]     |                                      ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:156:38
[INFO] [stdout]     |
[INFO] [stdout] 156 |                     IoSlice::advance(bufs, n.get());
[INFO] [stdout]     |                                      ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:160:38
[INFO] [stdout]     |
[INFO] [stdout] 160 |                     IoSlice::advance(bufs, n.get());
[INFO] [stdout]     |                                      ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib/std.rs:160:38
[INFO] [stdout]     |
[INFO] [stdout] 160 |                     IoSlice::advance(bufs, n.get());
[INFO] [stdout]     |                                      ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]                found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]    |                                 ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]               found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]    |                                 ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]               found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                       found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |         bufs = IoSlice::advance(bufs, 0);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                       found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:45:50
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Ok(n) => bufs = IoSlice::advance(bufs, n),
[INFO] [stdout]    |                                                  ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]               found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:45:50
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Ok(n) => bufs = IoSlice::advance(bufs, n),
[INFO] [stdout]    |                                                  ^^^^ expected struct `IoSlice`, found slice
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut IoSlice<'_>`
[INFO] [stdout]               found mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:45:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Ok(n) => bufs = IoSlice::advance(bufs, n),
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                       found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib/write.rs:45:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Ok(n) => bufs = IoSlice::advance(bufs, n),
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ expected mutable reference, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut [IoSlice<'_>]`
[INFO] [stdout]                       found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rw-poc` due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bd3e95fc9173b96d1e8968f3aa0ce4ae15a14538e467b85e12942078980854a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd3e95fc9173b96d1e8968f3aa0ce4ae15a14538e467b85e12942078980854a4", kill_on_drop: false }`
[INFO] [stdout] bd3e95fc9173b96d1e8968f3aa0ce4ae15a14538e467b85e12942078980854a4