[INFO] fetching crate ftswarm_proto 0.2.5...
[INFO] checking ftswarm_proto-0.2.5 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate ftswarm_proto 0.2.5 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate ftswarm_proto 0.2.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ftswarm_proto 0.2.5
[INFO] tweaked toml for crates.io crate ftswarm_proto 0.2.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ftswarm_proto 0.2.5 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 ftswarm_proto 0.2.5 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] 950655d7fea4f9d73ae68e061ab01050e161f7a7fffec8713b3d036cdf881ba3
[INFO] running `Command { std: "docker" "start" "-a" "950655d7fea4f9d73ae68e061ab01050e161f7a7fffec8713b3d036cdf881ba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "950655d7fea4f9d73ae68e061ab01050e161f7a7fffec8713b3d036cdf881ba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "950655d7fea4f9d73ae68e061ab01050e161f7a7fffec8713b3d036cdf881ba3", kill_on_drop: false }`
[INFO] [stdout] 950655d7fea4f9d73ae68e061ab01050e161f7a7fffec8713b3d036cdf881ba3
[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] bda973e980460f2cf376ef1e20e29de73944a783df1a134d3d1730b4f6ccfcf6
[INFO] running `Command { std: "docker" "start" "-a" "bda973e980460f2cf376ef1e20e29de73944a783df1a134d3d1730b4f6ccfcf6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]     Checking strum v0.26.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling strum_macros v0.26.2
[INFO] [stderr]     Checking ftswarm_proto v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<S2RMessage, Infallible>
[INFO] [stdout]   --> examples/proto_messageparser.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |         match S2RMessage::try_from(message.to_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<RPCReturnParam, Infallible>
[INFO] [stdout]   --> examples/proto_messageparser.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |         match RPCReturnParam::try_from(value.to_string()) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ftswarm_proto` (example "proto_messageparser") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bda973e980460f2cf376ef1e20e29de73944a783df1a134d3d1730b4f6ccfcf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bda973e980460f2cf376ef1e20e29de73944a783df1a134d3d1730b4f6ccfcf6", kill_on_drop: false }`
[INFO] [stdout] bda973e980460f2cf376ef1e20e29de73944a783df1a134d3d1730b4f6ccfcf6