[INFO] cloning repository https://github.com/Xe/printerfacts-warp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Xe/printerfacts-warp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXe%2Fprinterfacts-warp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXe%2Fprinterfacts-warp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b7c5b6138cb66c60328ba1caafbcfe6778854bc
[INFO] checking Xe/printerfacts-warp 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%2FXe%2Fprinterfacts-warp" "/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/Xe/printerfacts-warp
[INFO] finished tweaking git repo https://github.com/Xe/printerfacts-warp
[INFO] tweaked toml for git repo https://github.com/Xe/printerfacts-warp written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Xe/printerfacts-warp 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/Xe/printerfacts-warp 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] ab9ca8be96a0d6e4406dd3dfa015c6966a5ba3400025db92f79d2a676287e743
[INFO] running `Command { std: "docker" "start" "-a" "ab9ca8be96a0d6e4406dd3dfa015c6966a5ba3400025db92f79d2a676287e743", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab9ca8be96a0d6e4406dd3dfa015c6966a5ba3400025db92f79d2a676287e743", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab9ca8be96a0d6e4406dd3dfa015c6966a5ba3400025db92f79d2a676287e743", kill_on_drop: false }`
[INFO] [stdout] ab9ca8be96a0d6e4406dd3dfa015c6966a5ba3400025db92f79d2a676287e743
[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] d42c29c9f67bc3dbc260d1a8b7da0f7030a8bc41b4e138c4af71165803e631ca
[INFO] running `Command { std: "docker" "start" "-a" "d42c29c9f67bc3dbc260d1a8b7da0f7030a8bc41b4e138c4af71165803e631ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling syn v1.0.21
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking pin-project-lite v0.1.5
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling quote v1.0.5
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking input_buffer v0.3.1
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking buf_redux v0.8.4
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking base64 v0.12.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking dtoa v0.4.5
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking urlencoding v1.0.0
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking headers-core v0.2.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]     Checking headers v0.3.2
[INFO] [stderr]     Checking tungstenite v0.10.1
[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.16
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]     Checking tokio v0.2.20
[INFO] [stderr]     Checking pin-project v0.4.16
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking pfacts v0.1.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking tokio-tungstenite v0.10.1
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking warp v0.2.2
[INFO] [stderr]     Checking printerfacts v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/main.rs:6:64
[INFO] [stdout]   |
[INFO] [stdout] 6 |   async fn give_fact(facts: Facts) -> Result<String, Infallible> {
[INFO] [stdout]   |  ________________________________________________________________^
[INFO] [stdout] 7 | |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout] 8 | | }
[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<String, Infallible>
[INFO] [stdout]  --> src/main.rs:6:64
[INFO] [stdout]   |
[INFO] [stdout] 6 |   async fn give_fact(facts: Facts) -> Result<String, Infallible> {
[INFO] [stdout]   |  ________________________________________________________________^
[INFO] [stdout] 7 | |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout] 8 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `printerfacts` (bin "printerfacts") 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<String, Infallible>
[INFO] [stdout]  --> src/main.rs:6:64
[INFO] [stdout]   |
[INFO] [stdout] 6 |   async fn give_fact(facts: Facts) -> Result<String, Infallible> {
[INFO] [stdout]   |  ________________________________________________________________^
[INFO] [stdout] 7 | |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout] 8 | | }
[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<String, Infallible>
[INFO] [stdout]  --> src/main.rs:6:64
[INFO] [stdout]   |
[INFO] [stdout] 6 |   async fn give_fact(facts: Facts) -> Result<String, Infallible> {
[INFO] [stdout]   |  ________________________________________________________________^
[INFO] [stdout] 7 | |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout] 8 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Ok(facts.choose(&mut thread_rng()).unwrap().clone())
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `printerfacts` (bin "printerfacts" test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "d42c29c9f67bc3dbc260d1a8b7da0f7030a8bc41b4e138c4af71165803e631ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d42c29c9f67bc3dbc260d1a8b7da0f7030a8bc41b4e138c4af71165803e631ca", kill_on_drop: false }`
[INFO] [stdout] d42c29c9f67bc3dbc260d1a8b7da0f7030a8bc41b4e138c4af71165803e631ca
