[INFO] cloning repository https://github.com/Nadrieril/derive-generic-visitor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nadrieril/derive-generic-visitor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNadrieril%2Fderive-generic-visitor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNadrieril%2Fderive-generic-visitor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1004cb4189fdf0ad257001aa5cb8e431649271e1
[INFO] checking Nadrieril/derive-generic-visitor 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%2FNadrieril%2Fderive-generic-visitor" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Nadrieril/derive-generic-visitor
[INFO] finished tweaking git repo https://github.com/Nadrieril/derive-generic-visitor
[INFO] tweaked toml for git repo https://github.com/Nadrieril/derive-generic-visitor written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Nadrieril/derive-generic-visitor 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/Nadrieril/derive-generic-visitor 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 1e9c5adc0d31620137c92b7d958ae705f6aaf6cd2cafac912073043c92d95b4b
[INFO] running `Command { std: "docker" "start" "-a" "1e9c5adc0d31620137c92b7d958ae705f6aaf6cd2cafac912073043c92d95b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e9c5adc0d31620137c92b7d958ae705f6aaf6cd2cafac912073043c92d95b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e9c5adc0d31620137c92b7d958ae705f6aaf6cd2cafac912073043c92d95b4b", kill_on_drop: false }`
[INFO] [stdout] 1e9c5adc0d31620137c92b7d958ae705f6aaf6cd2cafac912073043c92d95b4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 3b71070d963ce877766794837fe39d78411d9b47168954071d432236e78c3a63
[INFO] running `Command { std: "docker" "start" "-a" "3b71070d963ce877766794837fe39d78411d9b47168954071d432236e78c3a63", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.14
[INFO] [stderr]     Checking ident_case v1.0.1
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking unicode-segmentation v1.12.0
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking proc-macro2 v1.0.92
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]     Checking derive_generic_visitor_macros v1.0.0 (/opt/rustwide/workdir/derive_generic_visitor_macros)
[INFO] [stderr]     Checking derive_generic_visitor v1.0.0 (/opt/rustwide/workdir/derive_generic_visitor)
[INFO] [stdout] error: this type will no longer be must used: derive_generic_visitor::ControlFlow<derive_generic_visitor::Infallible, test_derive::SumVisitor>
[INFO] [stdout]   --> derive_generic_visitor/tests/simple.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 |       let sum = (SumVisitor { sum: 0 })
[INFO] [stdout]    |  _______________^
[INFO] [stdout] 44 | |         .visit_by_val(&foo)
[INFO] [stdout]    | |___________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive_generic_visitor` (test "simple") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3b71070d963ce877766794837fe39d78411d9b47168954071d432236e78c3a63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b71070d963ce877766794837fe39d78411d9b47168954071d432236e78c3a63", kill_on_drop: false }`
[INFO] [stdout] 3b71070d963ce877766794837fe39d78411d9b47168954071d432236e78c3a63
