[INFO] fetching crate backon 1.5.2...
[INFO] building backon-1.5.2 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate backon 1.5.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate backon 1.5.2
[INFO] finished tweaking crates.io crate backon 1.5.2
[INFO] tweaked toml for crates.io crate backon 1.5.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate backon 1.5.2 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate backon 1.5.2 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09d965fb9008d45aebee4c938cb009b14728a7b59a5e70affc6e8a8cc62f40af
[INFO] running `Command { std: "docker" "start" "-a" "09d965fb9008d45aebee4c938cb009b14728a7b59a5e70affc6e8a8cc62f40af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09d965fb9008d45aebee4c938cb009b14728a7b59a5e70affc6e8a8cc62f40af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d965fb9008d45aebee4c938cb009b14728a7b59a5e70affc6e8a8cc62f40af", kill_on_drop: false }`
[INFO] [stdout] 09d965fb9008d45aebee4c938cb009b14728a7b59a5e70affc6e8a8cc62f40af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 072893ce74f05db50f9379e5a3e23b3a2bec20f684b4037519b7cbeebe826175
[INFO] running `Command { std: "docker" "start" "-a" "072893ce74f05db50f9379e5a3e23b3a2bec20f684b4037519b7cbeebe826175", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.47.0
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling backon v1.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `PleaseEnableAFeatureOrProvideACustomSleeper` is never constructed
[INFO] [stdout]   --> src/sleep.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct PleaseEnableAFeatureOrProvideACustomSleeper;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PleaseEnableAFeatureOrProvideACustomSleeper` is never constructed
[INFO] [stdout]   --> src/blocking_sleep.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct PleaseEnableAFeatureOrProvideACustomSleeper;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "072893ce74f05db50f9379e5a3e23b3a2bec20f684b4037519b7cbeebe826175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "072893ce74f05db50f9379e5a3e23b3a2bec20f684b4037519b7cbeebe826175", kill_on_drop: false }`
[INFO] [stdout] 072893ce74f05db50f9379e5a3e23b3a2bec20f684b4037519b7cbeebe826175
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fc2ae122ca0f7dfa53ac15a7967a11a59800c4475ef517d79b14934f12a7174
[INFO] running `Command { std: "docker" "start" "-a" "0fc2ae122ca0f7dfa53ac15a7967a11a59800c4475ef517d79b14934f12a7174", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling slab v0.4.10
[INFO] [stderr]    Compiling cc v1.2.30
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling hashbrown v0.15.4
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling serde_json v1.0.141
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling parking v2.2.1
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling crc-catalog v2.4.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling crc v3.3.0
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling dotenvy v0.15.7
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling event-listener v5.4.0
[INFO] [stderr]    Compiling iri-string v0.7.8
[INFO] [stderr]    Compiling flume v0.11.1
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling indexmap v2.10.0
[INFO] [stderr]    Compiling hashlink v0.10.0
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling openssl-sys v0.9.109
[INFO] [stderr]    Compiling libsqlite3-sys v0.30.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling tokio v1.47.0
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/4987e9d4227139400384ab59296ffee3b0fb1183/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.104/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=bcebb22733c1a4b9 -C extra-filename=-f9cb331781faf872 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-09040b10b620fa15.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-bff949ffe258c67d.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-b3925cc8f83e9ac1.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0fc2ae122ca0f7dfa53ac15a7967a11a59800c4475ef517d79b14934f12a7174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc2ae122ca0f7dfa53ac15a7967a11a59800c4475ef517d79b14934f12a7174", kill_on_drop: false }`
[INFO] [stdout] 0fc2ae122ca0f7dfa53ac15a7967a11a59800c4475ef517d79b14934f12a7174
