[INFO] cloning repository https://github.com/z-inform/rust_cell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/z-inform/rust_cell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz-inform%2Frust_cell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz-inform%2Frust_cell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3167abda2d1e449d8fc2878372c944205cf5949e
[INFO] checking z-inform/rust_cell against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz-inform%2Frust_cell" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/z-inform/rust_cell 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/z-inform/rust_cell
[INFO] finished tweaking git repo https://github.com/z-inform/rust_cell
[INFO] tweaked toml for git repo https://github.com/z-inform/rust_cell written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/z-inform/rust_cell 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.8
[INFO] [stderr]   Downloaded cortex-m v0.7.5
[INFO] [stderr]   Downloaded heapless v0.7.13
[INFO] [stderr]   Downloaded rstar v0.9.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 073f6ef17ce6730ff118d88ec703f6040e57fb68cad7a8133235a3ee17266c77
[INFO] running `Command { std: "docker" "start" "-a" "073f6ef17ce6730ff118d88ec703f6040e57fb68cad7a8133235a3ee17266c77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "073f6ef17ce6730ff118d88ec703f6040e57fb68cad7a8133235a3ee17266c77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "073f6ef17ce6730ff118d88ec703f6040e57fb68cad7a8133235a3ee17266c77", kill_on_drop: false }`
[INFO] [stdout] 073f6ef17ce6730ff118d88ec703f6040e57fb68cad7a8133235a3ee17266c77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4b6d39f070b79b4d4399a9be2f6d6343400c85f52ec3c3fcf0a92653c9f96fe5
[INFO] running `Command { std: "docker" "start" "-a" "4b6d39f070b79b4d4399a9be2f6d6343400c85f52ec3c3fcf0a92653c9f96fe5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling semver v1.0.9
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling libm v0.2.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking os_str_bytes v6.3.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking svg v0.10.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking spin v0.9.3
[INFO] [stderr]    Compiling heapless v0.7.13
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rstar v0.9.3
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]     Checking clap v3.2.20
[INFO] [stderr]     Checking rust_cell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `doc`
[INFO] [stdout]    --> src/groups/field.rs:387:30
[INFO] [stdout]     |
[INFO] [stdout] 387 |     pub fn normalize_svg(mut doc: Document) {
[INFO] [stdout]     |                              ^^^ help: if this is intentional, prefix it with an underscore: `_doc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/groups/field.rs:387:26
[INFO] [stdout]     |
[INFO] [stdout] 387 |     pub fn normalize_svg(mut doc: Document) {
[INFO] [stdout]     |                          ----^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doc`
[INFO] [stdout]    --> src/groups/field.rs:387:30
[INFO] [stdout]     |
[INFO] [stdout] 387 |     pub fn normalize_svg(mut doc: Document) {
[INFO] [stdout]     |                              ^^^ help: if this is intentional, prefix it with an underscore: `_doc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/groups/field.rs:387:26
[INFO] [stdout]     |
[INFO] [stdout] 387 |     pub fn normalize_svg(mut doc: Document) {
[INFO] [stdout]     |                          ----^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.77s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: svg v0.10.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "4b6d39f070b79b4d4399a9be2f6d6343400c85f52ec3c3fcf0a92653c9f96fe5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b6d39f070b79b4d4399a9be2f6d6343400c85f52ec3c3fcf0a92653c9f96fe5", kill_on_drop: false }`
[INFO] [stdout] 4b6d39f070b79b4d4399a9be2f6d6343400c85f52ec3c3fcf0a92653c9f96fe5