[INFO] fetching crate tax_code 0.1.2...
[INFO] testing tax_code-0.1.2 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate tax_code 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate tax_code 0.1.2
[INFO] finished tweaking crates.io crate tax_code 0.1.2
[INFO] tweaked toml for crates.io crate tax_code 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tax_code 0.1.2 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tax_code 0.1.2 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dcd966d4dd0b552eea7200768c0e06f1b290adbf20af5ece66446f78fe28dcf
[INFO] running `Command { std: "docker" "start" "-a" "5dcd966d4dd0b552eea7200768c0e06f1b290adbf20af5ece66446f78fe28dcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dcd966d4dd0b552eea7200768c0e06f1b290adbf20af5ece66446f78fe28dcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dcd966d4dd0b552eea7200768c0e06f1b290adbf20af5ece66446f78fe28dcf", kill_on_drop: false }`
[INFO] [stdout] 5dcd966d4dd0b552eea7200768c0e06f1b290adbf20af5ece66446f78fe28dcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14b695a4cf5a311438aa98bbd7c9b444bf3d5763829dbb86b7b95aab7e8beac4
[INFO] running `Command { std: "docker" "start" "-a" "14b695a4cf5a311438aa98bbd7c9b444bf3d5763829dbb86b7b95aab7e8beac4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling ryu v1.0.20
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tax_code v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `tax_code v0.1.2 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/tax_code-22160fac9f14e3b0/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=build.rs
[INFO] [stderr]   cargo:rerun-if-changed=/opt/rustwide/workdir/src/Bracket.json
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   DEBUG: build.rs started.
[INFO] [stderr]   DEBUG: Reading tax brackets JSON from: "/opt/rustwide/workdir/src/Bracket.json"
[INFO] [stderr]   Error: "Failed to write to /opt/rustwide/workdir/src/brackets.rs: Read-only file system (os error 30)"
[INFO] running `Command { std: "docker" "inspect" "14b695a4cf5a311438aa98bbd7c9b444bf3d5763829dbb86b7b95aab7e8beac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b695a4cf5a311438aa98bbd7c9b444bf3d5763829dbb86b7b95aab7e8beac4", kill_on_drop: false }`
[INFO] [stdout] 14b695a4cf5a311438aa98bbd7c9b444bf3d5763829dbb86b7b95aab7e8beac4