[INFO] fetching crate hacknews 0.2.0...
[INFO] checking hacknews-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate hacknews 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate hacknews 0.2.0
[INFO] finished tweaking crates.io crate hacknews 0.2.0
[INFO] tweaked toml for crates.io crate hacknews 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate hacknews 0.2.0 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] crate crates.io crate hacknews 0.2.0 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] [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-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] 87303b2f680df87d2ddb1a61950286a8322c9c3670e18e347b42640e08b59a02
[INFO] running `Command { std: "docker" "start" "-a" "87303b2f680df87d2ddb1a61950286a8322c9c3670e18e347b42640e08b59a02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87303b2f680df87d2ddb1a61950286a8322c9c3670e18e347b42640e08b59a02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87303b2f680df87d2ddb1a61950286a8322c9c3670e18e347b42640e08b59a02", kill_on_drop: false }`
[INFO] [stdout] 87303b2f680df87d2ddb1a61950286a8322c9c3670e18e347b42640e08b59a02
[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] 81c5db22d3919a9c2eee2276ce5a4325aada1d29662928b9a658c4a4c6ef50be
[INFO] running `Command { std: "docker" "start" "-a" "81c5db22d3919a9c2eee2276ce5a4325aada1d29662928b9a658c4a4c6ef50be", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.20
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking tinyvec v1.4.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking tracing v0.1.28
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling signal-hook v0.3.10
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking array-macro v1.0.5
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking os_str_bytes v3.1.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling enum-map-derive v0.4.6
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.4
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking enum-map v0.6.4
[INFO] [stderr]     Checking clap v3.0.0-beta.4
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling wasmer_enumset_derive v0.5.0
[INFO] [stderr]     Checking wasmer_enumset v1.0.1
[INFO] [stderr]     Checking cursive_core v0.2.2
[INFO] [stderr]     Checking futures-executor v0.3.17
[INFO] [stderr]     Checking futures v0.3.17
[INFO] [stderr]     Checking cursive v0.16.3
[INFO] [stderr]     Checking tokio-util v0.6.8
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking tokio-stream v0.1.7
[INFO] [stderr]     Checking h2 v0.3.4
[INFO] [stderr]     Checking tokio-test v0.4.2
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking hyper v0.14.13
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking hacknews v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     #[clap(short, long, default_value = "cli")]
[INFO] [stdout] 20 | |     ui: String,
[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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     #[clap(short, long, required = false, default_value = "")]
[INFO] [stdout] 22 | |     item: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     #[clap(short, long, default_value = "cli")]
[INFO] [stdout] 20 | |     ui: String,
[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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     #[clap(short, long, required = false, default_value = "")]
[INFO] [stdout] 22 | |     item: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hacknews` (bin "hacknews") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `hacknews` (bin "hacknews" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "81c5db22d3919a9c2eee2276ce5a4325aada1d29662928b9a658c4a4c6ef50be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c5db22d3919a9c2eee2276ce5a4325aada1d29662928b9a658c4a4c6ef50be", kill_on_drop: false }`
[INFO] [stdout] 81c5db22d3919a9c2eee2276ce5a4325aada1d29662928b9a658c4a4c6ef50be
