[INFO] cloning repository https://github.com/zslehoczky/rust-calculator [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zslehoczky/rust-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzslehoczky%2Frust-calculator", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzslehoczky%2Frust-calculator'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 62b7829ef44fed5d1b0fdb1f0b180b708b7a91f5 [INFO] checking zslehoczky/rust-calculator against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzslehoczky%2Frust-calculator" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/zslehoczky/rust-calculator [INFO] finished tweaking git repo https://github.com/zslehoczky/rust-calculator [INFO] tweaked toml for git repo https://github.com/zslehoczky/rust-calculator written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/zslehoczky/rust-calculator on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/zslehoczky/rust-calculator 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8e178371bd8e7d24f9efe2de1b8f3942a873648ef35a901098cedbf15a46d10d [INFO] running `Command { std: "docker" "start" "-a" "8e178371bd8e7d24f9efe2de1b8f3942a873648ef35a901098cedbf15a46d10d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8e178371bd8e7d24f9efe2de1b8f3942a873648ef35a901098cedbf15a46d10d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8e178371bd8e7d24f9efe2de1b8f3942a873648ef35a901098cedbf15a46d10d", kill_on_drop: false }` [INFO] [stdout] 8e178371bd8e7d24f9efe2de1b8f3942a873648ef35a901098cedbf15a46d10d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] bb45c43e5ec44aa9ff66b64e2f0f349b0135f7a0390094b2fc03222fb6a1349c [INFO] running `Command { std: "docker" "start" "-a" "bb45c43e5ec44aa9ff66b64e2f0f349b0135f7a0390094b2fc03222fb6a1349c", kill_on_drop: false }` [INFO] [stderr] Checking memchr v2.7.5 [INFO] [stderr] Compiling anyhow v1.0.98 [INFO] [stderr] Checking aho-corasick v1.1.3 [INFO] [stderr] Checking regex-automata v0.4.9 [INFO] [stderr] Checking regex v1.11.1 [INFO] [stderr] Checking basic_arithmetic_calculator v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error: this type will no longer be must used: ControlFlow, String> [INFO] [stdout] --> src/expression/solver.rs:94:28 [INFO] [stdout] | [INFO] [stdout] 94 | eval_subexpression(String::from_str(subexpr)?, multiplication_re)?.to_string(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/expression/solver.rs:94:28 [INFO] [stdout] | [INFO] [stdout] 94 | eval_subexpression(String::from_str(subexpr)?, multiplication_re)?.to_string(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `basic_arithmetic_calculator` (lib) due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: this type will no longer be must used: ControlFlow, String> [INFO] [stdout] --> src/expression/solver.rs:94:28 [INFO] [stdout] | [INFO] [stdout] 94 | eval_subexpression(String::from_str(subexpr)?, multiplication_re)?.to_string(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `basic_arithmetic_calculator` (lib test) due to 4 previous errors [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/expression/solver.rs:94:28 [INFO] [stdout] | [INFO] [stdout] 94 | eval_subexpression(String::from_str(subexpr)?, multiplication_re)?.to_string(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: ControlFlow, String> [INFO] [stdout] --> src/expression/mod.rs:88:24 [INFO] [stdout] | [INFO] [stdout] 88 | evaluator.eval(String::from_str(expr)?) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/expression/mod.rs:88:24 [INFO] [stdout] | [INFO] [stdout] 88 | evaluator.eval(String::from_str(expr)?) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "bb45c43e5ec44aa9ff66b64e2f0f349b0135f7a0390094b2fc03222fb6a1349c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bb45c43e5ec44aa9ff66b64e2f0f349b0135f7a0390094b2fc03222fb6a1349c", kill_on_drop: false }` [INFO] [stdout] bb45c43e5ec44aa9ff66b64e2f0f349b0135f7a0390094b2fc03222fb6a1349c