[INFO] fetching crate rustedflask 2.3.0...
[INFO] checking rustedflask-2.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rustedflask 2.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rustedflask 2.3.0
[INFO] finished tweaking crates.io crate rustedflask 2.3.0
[INFO] tweaked toml for crates.io crate rustedflask 2.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustedflask 2.3.0 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] 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]     Blocking waiting for file lock on package cache
[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] 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] 8f4f0279b36c9b3d457d9cfd13b6271e3b93d568f6bf71cbe15f8e4739847a98
[INFO] running `Command { std: "docker" "start" "-a" "8f4f0279b36c9b3d457d9cfd13b6271e3b93d568f6bf71cbe15f8e4739847a98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f4f0279b36c9b3d457d9cfd13b6271e3b93d568f6bf71cbe15f8e4739847a98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f4f0279b36c9b3d457d9cfd13b6271e3b93d568f6bf71cbe15f8e4739847a98", kill_on_drop: false }`
[INFO] [stdout] 8f4f0279b36c9b3d457d9cfd13b6271e3b93d568f6bf71cbe15f8e4739847a98
[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] 955b20b39b832d809496691bd20a4617a14f2a3eee6942dceea086a2d94bb345
[INFO] running `Command { std: "docker" "start" "-a" "955b20b39b832d809496691bd20a4617a14f2a3eee6942dceea086a2d94bb345", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]     Checking rustedflask v2.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:304:26
[INFO] [stdout]     |
[INFO] [stdout] 304 |         let http_major = char::try_from(http_version_bytes[0])
[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<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:311:26
[INFO] [stdout]     |
[INFO] [stdout] 311 |         let http_minor = char::try_from(http_version_bytes[2])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:479:26
[INFO] [stdout]     |
[INFO] [stdout] 479 |         let http_major = char::try_from(http_version_bytes[0])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:486:26
[INFO] [stdout]     |
[INFO] [stdout] 486 |         let http_minor = char::try_from(http_version_bytes[2])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustedflask` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rustedflask` (lib test) due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:304:26
[INFO] [stdout]     |
[INFO] [stdout] 304 |         let http_major = char::try_from(http_version_bytes[0])
[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<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:311:26
[INFO] [stdout]     |
[INFO] [stdout] 311 |         let http_minor = char::try_from(http_version_bytes[2])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:479:26
[INFO] [stdout]     |
[INFO] [stdout] 479 |         let http_major = char::try_from(http_version_bytes[0])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]    --> src/core/http/mod.rs:486:26
[INFO] [stdout]     |
[INFO] [stdout] 486 |         let http_minor = char::try_from(http_version_bytes[2])
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "955b20b39b832d809496691bd20a4617a14f2a3eee6942dceea086a2d94bb345", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "955b20b39b832d809496691bd20a4617a14f2a3eee6942dceea086a2d94bb345", kill_on_drop: false }`
[INFO] [stdout] 955b20b39b832d809496691bd20a4617a14f2a3eee6942dceea086a2d94bb345
