[INFO] fetching crate tax_code 0.1.2...
[INFO] testing tax_code-0.1.2 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate tax_code 0.1.2 into /workspace/builds/worker-4-tc1/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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tax_code 0.1.2 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 924b294438366fc146c9133ee90fab3f409c51d5b548ad2efc08ae2c13542634
[INFO] running `Command { std: "docker" "start" "-a" "924b294438366fc146c9133ee90fab3f409c51d5b548ad2efc08ae2c13542634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "924b294438366fc146c9133ee90fab3f409c51d5b548ad2efc08ae2c13542634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "924b294438366fc146c9133ee90fab3f409c51d5b548ad2efc08ae2c13542634", kill_on_drop: false }`
[INFO] [stdout] 924b294438366fc146c9133ee90fab3f409c51d5b548ad2efc08ae2c13542634
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbcb8ac562ac6f5af2936f43e8aaed3a1ff7200b3d666e2fd43c781af9c7d30f
[INFO] running `Command { std: "docker" "start" "-a" "bbcb8ac562ac6f5af2936f43e8aaed3a1ff7200b3d666e2fd43c781af9c7d30f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling serde v1.0.219
[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 serde_json v1.0.140
[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" "bbcb8ac562ac6f5af2936f43e8aaed3a1ff7200b3d666e2fd43c781af9c7d30f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbcb8ac562ac6f5af2936f43e8aaed3a1ff7200b3d666e2fd43c781af9c7d30f", kill_on_drop: false }`
[INFO] [stdout] bbcb8ac562ac6f5af2936f43e8aaed3a1ff7200b3d666e2fd43c781af9c7d30f