[INFO] cloning repository https://github.com/Hydrant777/kalkulacka
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hydrant777/kalkulacka" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHydrant777%2Fkalkulacka", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHydrant777%2Fkalkulacka'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 582c8b7029f8efe39d5f4ab62cd9e39147627c20
[INFO] checking Hydrant777/kalkulacka against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHydrant777%2Fkalkulacka" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Hydrant777/kalkulacka on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Hydrant777/kalkulacka
[INFO] finished tweaking git repo https://github.com/Hydrant777/kalkulacka
[INFO] tweaked toml for git repo https://github.com/Hydrant777/kalkulacka written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Hydrant777/kalkulacka 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2a793aad260e01b40156b7e513511c9f37f34ff01e985d7ae8b9b43dfbd7fa0
[INFO] running `Command { std: "docker" "start" "-a" "f2a793aad260e01b40156b7e513511c9f37f34ff01e985d7ae8b9b43dfbd7fa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2a793aad260e01b40156b7e513511c9f37f34ff01e985d7ae8b9b43dfbd7fa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2a793aad260e01b40156b7e513511c9f37f34ff01e985d7ae8b9b43dfbd7fa0", kill_on_drop: false }`
[INFO] [stdout] f2a793aad260e01b40156b7e513511c9f37f34ff01e985d7ae8b9b43dfbd7fa0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c3994f1a58c00a9fd5a815b80066494fcd70983426c6f5325acc23964130e94
[INFO] running `Command { std: "docker" "start" "-a" "9c3994f1a58c00a9fd5a815b80066494fcd70983426c6f5325acc23964130e94", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking kalkulacka v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:52:18
[INFO] [stdout]    |
[INFO] [stdout] 52 |       for cap in c_multiply.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 52 |       while let Some(cap) = c_multiply.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 52 |       if let Some(cap) = c_multiply.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:52:18
[INFO] [stdout]    |
[INFO] [stdout] 52 |       for cap in c_multiply.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 52 |       while let Some(cap) = c_multiply.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 52 |       if let Some(cap) = c_multiply.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:60:18
[INFO] [stdout]    |
[INFO] [stdout] 60 |       for cap in c_divide.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while let Some(cap) = c_divide.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 60 |       if let Some(cap) = c_divide.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:68:18
[INFO] [stdout]    |
[INFO] [stdout] 68 |       for cap in c_add.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 68 |       while let Some(cap) = c_add.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 68 |       if let Some(cap) = c_add.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:60:18
[INFO] [stdout]    |
[INFO] [stdout] 60 |       for cap in c_divide.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while let Some(cap) = c_divide.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 60 |       if let Some(cap) = c_divide.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |       for cap in c_substract.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 74 |       while let Some(cap) = c_substract.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 74 |       if let Some(cap) = c_substract.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:68:18
[INFO] [stdout]    |
[INFO] [stdout] 68 |       for cap in c_add.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 68 |       while let Some(cap) = c_add.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 68 |       if let Some(cap) = c_add.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 |       for cap in braces.captures(&output) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 97 |       while let Some(cap) = braces.captures(&output) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 97 |       if let Some(cap) = braces.captures(&output) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |       for cap in c_substract.captures(&partial) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 74 |       while let Some(cap) = c_substract.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 74 |       if let Some(cap) = c_substract.captures(&partial) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 |       for cap in braces.captures(&output) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 97 |       while let Some(cap) = braces.captures(&output) {
[INFO] [stdout]    |       ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 97 |       if let Some(cap) = braces.captures(&output) {
[INFO] [stdout]    |       ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "9c3994f1a58c00a9fd5a815b80066494fcd70983426c6f5325acc23964130e94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c3994f1a58c00a9fd5a815b80066494fcd70983426c6f5325acc23964130e94", kill_on_drop: false }`
[INFO] [stdout] 9c3994f1a58c00a9fd5a815b80066494fcd70983426c6f5325acc23964130e94