[INFO] fetching crate quickjs_regex_derive 0.1.2...
[INFO] building quickjs_regex_derive-0.1.2 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate quickjs_regex_derive 0.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate quickjs_regex_derive 0.1.2
[INFO] finished tweaking crates.io crate quickjs_regex_derive 0.1.2
[INFO] tweaked toml for crates.io crate quickjs_regex_derive 0.1.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate quickjs_regex_derive 0.1.2 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro-crate v1.3.1 (available: v3.4.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quickjs_regex_backend v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cd88789cb6eb905f18f7a29ea17db65849671f2214519b22e37f56e9379fc82
[INFO] running `Command { std: "docker" "start" "-a" "9cd88789cb6eb905f18f7a29ea17db65849671f2214519b22e37f56e9379fc82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cd88789cb6eb905f18f7a29ea17db65849671f2214519b22e37f56e9379fc82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cd88789cb6eb905f18f7a29ea17db65849671f2214519b22e37f56e9379fc82", kill_on_drop: false }`
[INFO] [stdout] 9cd88789cb6eb905f18f7a29ea17db65849671f2214519b22e37f56e9379fc82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a88a4e4f56581e38349dfda45d14b7383dd5bae6da8f9febe41784294408560
[INFO] running `Command { std: "docker" "start" "-a" "3a88a4e4f56581e38349dfda45d14b7383dd5bae6da8f9febe41784294408560", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling find-msvc-tools v0.1.2
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling hashbrown v0.16.0
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling indexmap v2.11.4
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling cc v1.2.39
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling quickjs_regex_backend v0.1.0
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling quickjs_regex_derive v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for ch in param.chars().next() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to iterate over `param.chars()` remove the call to `next`
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     for ch in param.chars().by_ref() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     if let Some(ch) = param.chars().next() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.26s
[INFO] running `Command { std: "docker" "inspect" "3a88a4e4f56581e38349dfda45d14b7383dd5bae6da8f9febe41784294408560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a88a4e4f56581e38349dfda45d14b7383dd5bae6da8f9febe41784294408560", kill_on_drop: false }`
[INFO] [stdout] 3a88a4e4f56581e38349dfda45d14b7383dd5bae6da8f9febe41784294408560
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f4dae68512445637fc6c570bd2550986b46d820ed9fda03b15405bdb96be549
[INFO] running `Command { std: "docker" "start" "-a" "5f4dae68512445637fc6c570bd2550986b46d820ed9fda03b15405bdb96be549", kill_on_drop: false }`
[INFO] [stderr]    Compiling quickjs_regex_derive v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/lib.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for ch in param.chars().next() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to iterate over `param.chars()` remove the call to `next`
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     for ch in param.chars().by_ref() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     if let Some(ch) = param.chars().next() {
[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/lib.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for ch in param.chars().next() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to iterate over `param.chars()` remove the call to `next`
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     for ch in param.chars().by_ref() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for ch in param.chars().next() {
[INFO] [stdout] 21 +     if let Some(ch) = param.chars().next() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "5f4dae68512445637fc6c570bd2550986b46d820ed9fda03b15405bdb96be549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f4dae68512445637fc6c570bd2550986b46d820ed9fda03b15405bdb96be549", kill_on_drop: false }`
[INFO] [stdout] 5f4dae68512445637fc6c570bd2550986b46d820ed9fda03b15405bdb96be549