[INFO] fetching crate rasn-derive 0.12.3...
[INFO] checking rasn-derive-0.12.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rasn-derive 0.12.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate rasn-derive 0.12.3 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rasn-derive 0.12.3
[INFO] finished tweaking crates.io crate rasn-derive 0.12.3
[INFO] tweaked toml for crates.io crate rasn-derive 0.12.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27ca37b1356a8e18e573f1b5022472bd4af0f16cd16434100be986db61713c93
[INFO] running `Command { std: "docker" "start" "-a" "27ca37b1356a8e18e573f1b5022472bd4af0f16cd16434100be986db61713c93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27ca37b1356a8e18e573f1b5022472bd4af0f16cd16434100be986db61713c93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27ca37b1356a8e18e573f1b5022472bd4af0f16cd16434100be986db61713c93", kill_on_drop: false }`
[INFO] [stdout] 27ca37b1356a8e18e573f1b5022472bd4af0f16cd16434100be986db61713c93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fc14350dff7f7438a1fb700b07259fc144489825babba7379d696f718e506cc
[INFO] running `Command { std: "docker" "start" "-a" "9fc14350dff7f7438a1fb700b07259fc144489825babba7379d696f718e506cc", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.8.19
[INFO] [stderr]     Checking libc v0.2.153
[INFO] [stderr]     Checking proc-macro2 v1.0.79
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rayon-core v1.12.1
[INFO] [stderr]     Checking uuid v1.8.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking rasn-derive v0.12.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `some_variant` is never read
[INFO] [stdout]    --> src/config.rs:412:9
[INFO] [stdout]     |
[INFO] [stdout] 410 | pub struct OptionalEnum {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] 411 |     pub path: syn::Ident,
[INFO] [stdout] 412 |     pub some_variant: syn::Type,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OptionalEnum` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `some_variant` is never read
[INFO] [stdout]    --> src/config.rs:412:9
[INFO] [stdout]     |
[INFO] [stdout] 410 | pub struct OptionalEnum {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] 411 |     pub path: syn::Ident,
[INFO] [stdout] 412 |     pub some_variant: syn::Type,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OptionalEnum` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.63s
[INFO] running `Command { std: "docker" "inspect" "9fc14350dff7f7438a1fb700b07259fc144489825babba7379d696f718e506cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fc14350dff7f7438a1fb700b07259fc144489825babba7379d696f718e506cc", kill_on_drop: false }`
[INFO] [stdout] 9fc14350dff7f7438a1fb700b07259fc144489825babba7379d696f718e506cc
[INFO] checking rasn-derive-0.12.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rasn-derive 0.12.3 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate rasn-derive 0.12.3 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rasn-derive 0.12.3
[INFO] finished tweaking crates.io crate rasn-derive 0.12.3
[INFO] tweaked toml for crates.io crate rasn-derive 0.12.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 111b724156804094a471d403cdda57a3205411a784764909b3f75567361e4705
[INFO] running `Command { std: "docker" "start" "-a" "111b724156804094a471d403cdda57a3205411a784764909b3f75567361e4705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "111b724156804094a471d403cdda57a3205411a784764909b3f75567361e4705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "111b724156804094a471d403cdda57a3205411a784764909b3f75567361e4705", kill_on_drop: false }`
[INFO] [stdout] 111b724156804094a471d403cdda57a3205411a784764909b3f75567361e4705
[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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb2aaba32b9a6ad9c02cd4cdcccc4afa50ce9fa1b32094b871eb6b1fb9b69a73
[INFO] running `Command { std: "docker" "start" "-a" "bb2aaba32b9a6ad9c02cd4cdcccc4afa50ce9fa1b32094b871eb6b1fb9b69a73", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.8.19
[INFO] [stderr]     Checking libc v0.2.153
[INFO] [stderr]     Checking proc-macro2 v1.0.79
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking uuid v1.8.0
[INFO] [stderr]     Checking rayon-core v1.12.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking rasn-derive v0.12.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `some_variant` is never read
[INFO] [stdout]    --> src/config.rs:412:9
[INFO] [stdout]     |
[INFO] [stdout] 410 | pub struct OptionalEnum {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] 411 |     pub path: syn::Ident,
[INFO] [stdout] 412 |     pub some_variant: syn::Type,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OptionalEnum` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `some_variant` is never read
[INFO] [stdout]    --> src/config.rs:412:9
[INFO] [stdout]     |
[INFO] [stdout] 410 | pub struct OptionalEnum {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] 411 |     pub path: syn::Ident,
[INFO] [stdout] 412 |     pub some_variant: syn::Type,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OptionalEnum` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.16s
[INFO] running `Command { std: "docker" "inspect" "bb2aaba32b9a6ad9c02cd4cdcccc4afa50ce9fa1b32094b871eb6b1fb9b69a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb2aaba32b9a6ad9c02cd4cdcccc4afa50ce9fa1b32094b871eb6b1fb9b69a73", kill_on_drop: false }`
[INFO] [stdout] bb2aaba32b9a6ad9c02cd4cdcccc4afa50ce9fa1b32094b871eb6b1fb9b69a73