[INFO] fetching crate sback 0.3.0...
[INFO] testing sback-0.3.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate sback 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate sback 0.3.0
[INFO] finished tweaking crates.io crate sback 0.3.0
[INFO] tweaked toml for crates.io crate sback 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sback 0.3.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sback 0.3.0 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" "+beta-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0eef931822cb10ac8a03a05cc6b79c8c653f338c01767e4099b3aae04dcc4b5
[INFO] running `Command { std: "docker" "start" "-a" "d0eef931822cb10ac8a03a05cc6b79c8c653f338c01767e4099b3aae04dcc4b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0eef931822cb10ac8a03a05cc6b79c8c653f338c01767e4099b3aae04dcc4b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0eef931822cb10ac8a03a05cc6b79c8c653f338c01767e4099b3aae04dcc4b5", kill_on_drop: false }`
[INFO] [stdout] d0eef931822cb10ac8a03a05cc6b79c8c653f338c01767e4099b3aae04dcc4b5
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c410d4e5fd051a3037656202c7ae9ceac74294c3dba72dc6dfa795d9c6f6a5b
[INFO] running `Command { std: "docker" "start" "-a" "9c410d4e5fd051a3037656202c7ae9ceac74294c3dba72dc6dfa795d9c6f6a5b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling flate2 v1.0.25
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling filetime v0.2.19
[INFO] [stderr]    Compiling xattr v0.2.3
[INFO] [stderr]    Compiling clap v3.2.23
[INFO] [stderr]    Compiling tar v0.4.38
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling xdg v2.4.1
[INFO] [stderr]    Compiling sback v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.40s
[INFO] running `Command { std: "docker" "inspect" "9c410d4e5fd051a3037656202c7ae9ceac74294c3dba72dc6dfa795d9c6f6a5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c410d4e5fd051a3037656202c7ae9ceac74294c3dba72dc6dfa795d9c6f6a5b", kill_on_drop: false }`
[INFO] [stdout] 9c410d4e5fd051a3037656202c7ae9ceac74294c3dba72dc6dfa795d9c6f6a5b
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 814aac551c7a4f0c17517873842a2697e154466245327bf24b3c80ccbd147f30
[INFO] running `Command { std: "docker" "start" "-a" "814aac551c7a4f0c17517873842a2697e154466245327bf24b3c80ccbd147f30", kill_on_drop: false }`
[INFO] [stderr]    Compiling sback v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "814aac551c7a4f0c17517873842a2697e154466245327bf24b3c80ccbd147f30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "814aac551c7a4f0c17517873842a2697e154466245327bf24b3c80ccbd147f30", kill_on_drop: false }`
[INFO] [stdout] 814aac551c7a4f0c17517873842a2697e154466245327bf24b3c80ccbd147f30
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3aa7c3045a9bc9c8c1e5a67f6512e53e19afbf7cc34f0e315bf900331c0a0e58
[INFO] running `Command { std: "docker" "start" "-a" "3aa7c3045a9bc9c8c1e5a67f6512e53e19afbf7cc34f0e315bf900331c0a0e58", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sback-49a4946e3864f9e0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3aa7c3045a9bc9c8c1e5a67f6512e53e19afbf7cc34f0e315bf900331c0a0e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa7c3045a9bc9c8c1e5a67f6512e53e19afbf7cc34f0e315bf900331c0a0e58", kill_on_drop: false }`
[INFO] [stdout] 3aa7c3045a9bc9c8c1e5a67f6512e53e19afbf7cc34f0e315bf900331c0a0e58