[INFO] cloning repository https://github.com/pchampin/coercible_errors
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pchampin/coercible_errors" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpchampin%2Fcoercible_errors", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpchampin%2Fcoercible_errors'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6aed9cbf83889621f04213626b6babbe35a9a3f1
[INFO] checking pchampin/coercible_errors 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%2Fpchampin%2Fcoercible_errors" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pchampin/coercible_errors
[INFO] finished tweaking git repo https://github.com/pchampin/coercible_errors
[INFO] tweaked toml for git repo https://github.com/pchampin/coercible_errors written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pchampin/coercible_errors 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/pchampin/coercible_errors 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d10c2ca548077c69397c2c165fa5a63f4e830beff01af55a8d60c495480db6da
[INFO] running `Command { std: "docker" "start" "-a" "d10c2ca548077c69397c2c165fa5a63f4e830beff01af55a8d60c495480db6da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d10c2ca548077c69397c2c165fa5a63f4e830beff01af55a8d60c495480db6da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d10c2ca548077c69397c2c165fa5a63f4e830beff01af55a8d60c495480db6da", kill_on_drop: false }`
[INFO] [stdout] d10c2ca548077c69397c2c165fa5a63f4e830beff01af55a8d60c495480db6da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 82c7889eefe554f5aef68fa895745b10c761c93ae3dfb8b158b17b4dcc7b5f24
[INFO] running `Command { std: "docker" "start" "-a" "82c7889eefe554f5aef68fa895745b10c761c93ae3dfb8b158b17b4dcc7b5f24", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]     Checking coercible_errors v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u16, Never>
[INFO] [stdout]   --> src/test.rs:33:54
[INFO] [stdout]    |
[INFO] [stdout] 33 |       fn produce(&self) -> StdResult<u16, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 34 | |         Ok(*self)
[INFO] [stdout] 35 | |     }
[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: std::result::Result<u16, Never>
[INFO] [stdout]   --> src/test.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         Ok(*self)
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u16, Never>
[INFO] [stdout]    --> src/test.rs:134:29
[INFO] [stdout]     |
[INFO] [stdout] 134 |     let _r: OkResult<u16> = 42_u16.produce();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u16, Never>
[INFO] [stdout]    --> src/test.rs:150:29
[INFO] [stdout]     |
[INFO] [stdout] 150 |     let _r: OkResult<u16> = PMax(42_u16, 1_u16).produce();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u16, Never>
[INFO] [stdout]    --> src/test.rs:190:29
[INFO] [stdout]     |
[INFO] [stdout] 190 |     let r1: OkResult<u16> = PMax(42_u16, 1_u16).produce();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u16, Never>
[INFO] [stdout]    --> src/test.rs:195:13
[INFO] [stdout]     |
[INFO] [stdout] 195 |     assert!(r1.unwrap() == 42);
[INFO] [stdout]     |             ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coercible_errors` (lib test) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "82c7889eefe554f5aef68fa895745b10c761c93ae3dfb8b158b17b4dcc7b5f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82c7889eefe554f5aef68fa895745b10c761c93ae3dfb8b158b17b4dcc7b5f24", kill_on_drop: false }`
[INFO] [stdout] 82c7889eefe554f5aef68fa895745b10c761c93ae3dfb8b158b17b4dcc7b5f24
