[INFO] fetching crate a4-core 0.0.4...
[INFO] checking a4-core-0.0.4 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate a4-core 0.0.4 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate a4-core 0.0.4 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate a4-core 0.0.4
[INFO] finished tweaking crates.io crate a4-core 0.0.4
[INFO] tweaked toml for crates.io crate a4-core 0.0.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding postcard v0.7.3 (latest: v1.0.10)
[INFO] [stderr]       Adding postcard-cobs v0.1.5-pre (latest: v0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33d28bb5e6258850943f17a67edba5f98dbe54c0d15ef2d164ad3d9ebc00deda
[INFO] running `Command { std: "docker" "start" "-a" "33d28bb5e6258850943f17a67edba5f98dbe54c0d15ef2d164ad3d9ebc00deda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33d28bb5e6258850943f17a67edba5f98dbe54c0d15ef2d164ad3d9ebc00deda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33d28bb5e6258850943f17a67edba5f98dbe54c0d15ef2d164ad3d9ebc00deda", kill_on_drop: false }`
[INFO] [stdout] 33d28bb5e6258850943f17a67edba5f98dbe54c0d15ef2d164ad3d9ebc00deda
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3554b9995681cea889cd09d524e834f81e9b792091fb47800cba5abad8c809ad
[INFO] running `Command { std: "docker" "start" "-a" "3554b9995681cea889cd09d524e834f81e9b792091fb47800cba5abad8c809ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking postcard v0.7.3
[INFO] [stderr]     Checking a4-core v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/nostd_rt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct HVecStack<T, const N: usize> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     data: Vec<T, N>,
[INFO] [stdout] 17 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/std_rt.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct StdVecStack<T> {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 12 |     data: Vec<T>,
[INFO] [stdout] 13 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StdVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `contents` is never read
[INFO] [stdout]    --> src/compiler.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |     Comment {
[INFO] [stdout]     |     ------- field in this variant
[INFO] [stdout] 248 |         contents: Vec<String>,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Chunk` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/nostd_rt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct HVecStack<T, const N: usize> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     data: Vec<T, N>,
[INFO] [stdout] 17 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.19s
[INFO] running `Command { std: "docker" "inspect" "3554b9995681cea889cd09d524e834f81e9b792091fb47800cba5abad8c809ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3554b9995681cea889cd09d524e834f81e9b792091fb47800cba5abad8c809ad", kill_on_drop: false }`
[INFO] [stdout] 3554b9995681cea889cd09d524e834f81e9b792091fb47800cba5abad8c809ad
[INFO] checking a4-core-0.0.4 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate a4-core 0.0.4 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate a4-core 0.0.4 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate a4-core 0.0.4
[INFO] finished tweaking crates.io crate a4-core 0.0.4
[INFO] tweaked toml for crates.io crate a4-core 0.0.4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding postcard v0.7.3 (latest: v1.0.10)
[INFO] [stderr]       Adding postcard-cobs v0.1.5-pre (latest: v0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 691fe7036de22dade91e000caf13dc5fe85eccd7dd911458f828d6aef3c9ca89
[INFO] running `Command { std: "docker" "start" "-a" "691fe7036de22dade91e000caf13dc5fe85eccd7dd911458f828d6aef3c9ca89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "691fe7036de22dade91e000caf13dc5fe85eccd7dd911458f828d6aef3c9ca89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "691fe7036de22dade91e000caf13dc5fe85eccd7dd911458f828d6aef3c9ca89", kill_on_drop: false }`
[INFO] [stdout] 691fe7036de22dade91e000caf13dc5fe85eccd7dd911458f828d6aef3c9ca89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0e6c80200d5c6f5924e79f560b48235c168ad719f920f4d53f3b98bece269c8
[INFO] running `Command { std: "docker" "start" "-a" "e0e6c80200d5c6f5924e79f560b48235c168ad719f920f4d53f3b98bece269c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking postcard v0.7.3
[INFO] [stderr]     Checking a4-core v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/nostd_rt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct HVecStack<T, const N: usize> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     data: Vec<T, N>,
[INFO] [stdout] 17 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/std_rt.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct StdVecStack<T> {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 12 |     data: Vec<T>,
[INFO] [stdout] 13 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StdVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `contents` is never read
[INFO] [stdout]    --> src/compiler.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |     Comment {
[INFO] [stdout]     |     ------- field in this variant
[INFO] [stdout] 248 |         contents: Vec<String>,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Chunk` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `err` is never read
[INFO] [stdout]   --> src/nostd_rt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct HVecStack<T, const N: usize> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     data: Vec<T, N>,
[INFO] [stdout] 17 |     err: Error,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.39s
[INFO] running `Command { std: "docker" "inspect" "e0e6c80200d5c6f5924e79f560b48235c168ad719f920f4d53f3b98bece269c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0e6c80200d5c6f5924e79f560b48235c168ad719f920f4d53f3b98bece269c8", kill_on_drop: false }`
[INFO] [stdout] e0e6c80200d5c6f5924e79f560b48235c168ad719f920f4d53f3b98bece269c8