[INFO] fetching crate calculator-backend 0.1.14...
[INFO] checking calculator-backend-0.1.14 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate calculator-backend 0.1.14 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate calculator-backend 0.1.14
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate calculator-backend 0.1.14
[INFO] tweaked toml for crates.io crate calculator-backend 0.1.14 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate calculator-backend 0.1.14 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate calculator-backend 0.1.14 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba8ae79d6c0b95f77f2af7386f6d6ab4a46d091102580ee8810204393005f845
[INFO] running `Command { std: "docker" "start" "-a" "ba8ae79d6c0b95f77f2af7386f6d6ab4a46d091102580ee8810204393005f845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba8ae79d6c0b95f77f2af7386f6d6ab4a46d091102580ee8810204393005f845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba8ae79d6c0b95f77f2af7386f6d6ab4a46d091102580ee8810204393005f845", kill_on_drop: false }`
[INFO] [stdout] ba8ae79d6c0b95f77f2af7386f6d6ab4a46d091102580ee8810204393005f845
[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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a075252315bd7bd2de1ea4d76c9a218b3fd7c8eb2305a1df765e85bbda2ccd6a
[INFO] running `Command { std: "docker" "start" "-a" "a075252315bd7bd2de1ea4d76c9a218b3fd7c8eb2305a1df765e85bbda2ccd6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.2.19
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling calculator-backend v0.1.14 (/opt/rustwide/workdir)
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c: In function 'needs_parentheses':
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c:579:32: warning: multi-character character constant [-Wmultichar]
[INFO] [stderr] warning: calculator-backend@0.1.14:   579 |         if (op == '!' || op == '√') return true;
[INFO] [stderr] warning: calculator-backend@0.1.14:       |                                ^~~
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c:579:29: warning: comparison is always false due to limited range of data type [-Wtype-limits]
[INFO] [stderr] warning: calculator-backend@0.1.14:   579 |         if (op == '!' || op == '√') return true;
[INFO] [stderr] warning: calculator-backend@0.1.14:       |                             ^~
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c: In function 'apply_operator':
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c:390:14: warning: 'result' may be used uninitialized [-Wmaybe-uninitialized]
[INFO] [stderr] warning: calculator-backend@0.1.14:   390 |     result = round_to_9_decimals(result);
[INFO] [stderr] warning: calculator-backend@0.1.14:       |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stderr] warning: calculator-backend@0.1.14: c_library/calculator.c:268:12: note: 'result' was declared here
[INFO] [stderr] warning: calculator-backend@0.1.14:   268 |     double result;
[INFO] [stderr] warning: calculator-backend@0.1.14:       |            ^~~~~~
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `Command { std: "docker" "inspect" "a075252315bd7bd2de1ea4d76c9a218b3fd7c8eb2305a1df765e85bbda2ccd6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a075252315bd7bd2de1ea4d76c9a218b3fd7c8eb2305a1df765e85bbda2ccd6a", kill_on_drop: false }`
[INFO] [stdout] a075252315bd7bd2de1ea4d76c9a218b3fd7c8eb2305a1df765e85bbda2ccd6a