[INFO] cloning repository https://github.com/conradludgate/flag-bearer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/conradludgate/flag-bearer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fflag-bearer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fflag-bearer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdecdcc7c2dcd78fc382f77d05934e8249ae5ba2
[INFO] checking conradludgate/flag-bearer against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fflag-bearer" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/conradludgate/flag-bearer
[INFO] finished tweaking git repo https://github.com/conradludgate/flag-bearer
[INFO] tweaked toml for git repo https://github.com/conradludgate/flag-bearer written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/conradludgate/flag-bearer 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 git repo https://github.com/conradludgate/flag-bearer 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d4022eaf34f27079dc47d138c5a09b4160c7a511f630733d97b38163f19b4da9
[INFO] running `Command { std: "docker" "start" "-a" "d4022eaf34f27079dc47d138c5a09b4160c7a511f630733d97b38163f19b4da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4022eaf34f27079dc47d138c5a09b4160c7a511f630733d97b38163f19b4da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4022eaf34f27079dc47d138c5a09b4160c7a511f630733d97b38163f19b4da9", kill_on_drop: false }`
[INFO] [stdout] d4022eaf34f27079dc47d138c5a09b4160c7a511f630733d97b38163f19b4da9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 291da8a7ec85b65cf0fcb1517c1fea40db7c093ad4926316c224effcd2711b96
[INFO] running `Command { std: "docker" "start" "-a" "291da8a7ec85b65cf0fcb1517c1fea40db7c093ad4926316c224effcd2711b96", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]     Checking pinned-aliasable v0.1.3
[INFO] [stderr]     Checking flag-bearer-core v0.1.0-rc.6 (/opt/rustwide/workdir/flag-bearer-core)
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking miniz_oxide v0.8.5
[INFO] [stderr]     Checking pollster v0.4.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking arbitrary v1.4.1
[INFO] [stderr]     Checking pin-list v0.1.1
[INFO] [stderr]     Checking flag-bearer-queue v0.1.0-rc.6 (/opt/rustwide/workdir/flag-bearer-queue)
[INFO] [stderr]     Checking flate2 v1.1.0
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]     Checking arbtest v0.3.2
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]     Checking flag-bearer-mutex v0.1.0-rc.6 (/opt/rustwide/workdir/flag-bearer-mutex)
[INFO] [stderr]     Checking flag-bearer v0.1.0-rc.6 (/opt/rustwide/workdir/flag-bearer)
[INFO] [stdout] error: this type will no longer be must used: Result<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:9
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[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<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:30
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[INFO] [stdout]     |                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:9
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flag-bearer` (lib) due to 3 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<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:9
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[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<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:30
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[INFO] [stdout]     |                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Permit<'_, S>, AcquireError<Uncloseable>>
[INFO] [stdout]    --> flag-bearer/src/lib.rs:480:9
[INFO] [stdout]     |
[INFO] [stdout] 480 |         self.acquire(params).await.unwrap_or_else(|e| e.never())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flag-bearer` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "291da8a7ec85b65cf0fcb1517c1fea40db7c093ad4926316c224effcd2711b96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "291da8a7ec85b65cf0fcb1517c1fea40db7c093ad4926316c224effcd2711b96", kill_on_drop: false }`
[INFO] [stdout] 291da8a7ec85b65cf0fcb1517c1fea40db7c093ad4926316c224effcd2711b96