[INFO] fetching crate twiggy-opt 0.8.0...
[INFO] checking twiggy-opt-0.8.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate twiggy-opt 0.8.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate twiggy-opt 0.8.0
[INFO] finished tweaking crates.io crate twiggy-opt 0.8.0
[INFO] tweaked toml for crates.io crate twiggy-opt 0.8.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate twiggy-opt 0.8.0 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 twiggy-opt 0.8.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 9ec0109a833605441bea42092a76bcde4562ba0a925e60647daa2bdc16a2ef6c
[INFO] running `Command { std: "docker" "start" "-a" "9ec0109a833605441bea42092a76bcde4562ba0a925e60647daa2bdc16a2ef6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ec0109a833605441bea42092a76bcde4562ba0a925e60647daa2bdc16a2ef6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ec0109a833605441bea42092a76bcde4562ba0a925e60647daa2bdc16a2ef6c", kill_on_drop: false }`
[INFO] [stdout] 9ec0109a833605441bea42092a76bcde4562ba0a925e60647daa2bdc16a2ef6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c1eb6e0b38d0321803806673fd4159139c8fc174adeddcac3cb8084d6f961b4c
[INFO] running `Command { std: "docker" "start" "-a" "c1eb6e0b38d0321803806673fd4159139c8fc174adeddcac3cb8084d6f961b4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]     Checking fixedbitset v0.4.1
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking frozen v1.0.0
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking wasmparser v0.80.2
[INFO] [stderr]     Checking petgraph v0.6.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling twiggy-opt v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking thiserror v1.0.40
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking twiggy-ir v0.8.0
[INFO] [stderr]     Checking twiggy-traits v0.8.0
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 163 | /     /// The name of the function whose dominator subtree should be printed.
[INFO] [stdout] 164 | |     items: Vec<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<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:251:5
[INFO] [stdout]     |
[INFO] [stdout] 251 | /     /// The functions to find call paths to.
[INFO] [stdout] 252 | |     functions: Vec<String>,
[INFO] [stdout]     | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:364:5
[INFO] [stdout]     |
[INFO] [stdout] 364 | /     /// The names of the generic functions whose monomorphizations
[INFO] [stdout] 365 | |     /// should be printed.
[INFO] [stdout] 366 | |     functions: Vec<String>,
[INFO] [stdout]     | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:545:5
[INFO] [stdout]     |
[INFO] [stdout] 545 | /     /// The name of the item(s) whose diff should be printed.
[INFO] [stdout] 546 | |     items: Vec<String>,
[INFO] [stdout]     | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 163 | /     /// The name of the function whose dominator subtree should be printed.
[INFO] [stdout] 164 | |     items: Vec<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<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:251:5
[INFO] [stdout]     |
[INFO] [stdout] 251 | /     /// The functions to find call paths to.
[INFO] [stdout] 252 | |     functions: Vec<String>,
[INFO] [stdout]     | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:364:5
[INFO] [stdout]     |
[INFO] [stdout] 364 | /     /// The names of the generic functions whose monomorphizations
[INFO] [stdout] 365 | |     /// should be printed.
[INFO] [stdout] 366 | |     functions: Vec<String>,
[INFO] [stdout]     | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/twiggy-opt-6f3ca26c922a1598/out/cli.rs:545:5
[INFO] [stdout]     |
[INFO] [stdout] 545 | /     /// The name of the item(s) whose diff should be printed.
[INFO] [stdout] 546 | |     items: Vec<String>,
[INFO] [stdout]     | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `twiggy-opt` (lib test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `twiggy-opt` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "c1eb6e0b38d0321803806673fd4159139c8fc174adeddcac3cb8084d6f961b4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1eb6e0b38d0321803806673fd4159139c8fc174adeddcac3cb8084d6f961b4c", kill_on_drop: false }`
[INFO] [stdout] c1eb6e0b38d0321803806673fd4159139c8fc174adeddcac3cb8084d6f961b4c
