[INFO] cloning repository https://github.com/ef3d0c3e/png_data
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ef3d0c3e/png_data" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fef3d0c3e%2Fpng_data", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fef3d0c3e%2Fpng_data'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d8cb589ec23194f4648381c80acfbffdf8c0543
[INFO] checking ef3d0c3e/png_data against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fef3d0c3e%2Fpng_data" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ef3d0c3e/png_data
[INFO] finished tweaking git repo https://github.com/ef3d0c3e/png_data
[INFO] tweaked toml for git repo https://github.com/ef3d0c3e/png_data written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ef3d0c3e/png_data on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ef3d0c3e/png_data 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded entropy v0.4.2
[INFO] [stderr]   Downloaded flate2 v1.0.31
[INFO] [stderr]   Downloaded syn v2.0.74
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ec876e61b8a9806dd0196c65323b9a084cd12297bb1b7c0e746a90af63a4263
[INFO] running `Command { std: "docker" "start" "-a" "1ec876e61b8a9806dd0196c65323b9a084cd12297bb1b7c0e746a90af63a4263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ec876e61b8a9806dd0196c65323b9a084cd12297bb1b7c0e746a90af63a4263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ec876e61b8a9806dd0196c65323b9a084cd12297bb1b7c0e746a90af63a4263", kill_on_drop: false }`
[INFO] [stdout] 1ec876e61b8a9806dd0196c65323b9a084cd12297bb1b7c0e746a90af63a4263
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1f52061c3475b050561f8a9174c222daba0c09eab315d86dc7936cd4edbdf29
[INFO] running `Command { std: "docker" "start" "-a" "f1f52061c3475b050561f8a9174c222daba0c09eab315d86dc7936cd4edbdf29", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking cpufeatures v0.2.13
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]     Checking entropy v0.4.2
[INFO] [stderr]     Checking flate2 v1.0.31
[INFO] [stderr]     Checking crc v3.2.1
[INFO] [stderr]    Compiling syn v2.0.74
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking blake2 v0.10.6
[INFO] [stderr]     Checking png v0.17.13
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking password-hash v0.5.0
[INFO] [stderr]     Checking argon2 v0.5.3
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking png_data v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/png_data/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(isqrt)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `isqrt` has been stable since 1.84.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/png_data/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(isqrt)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/png_data/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(isqrt)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `isqrt` has been stable since 1.84.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/png_data/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(isqrt)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `png_data` (bin "png_data" test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/png_embed/block.rs:354:7
[INFO] [stdout]     |
[INFO] [stdout] 354 |         for i in 0..data.len() / 2 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byte`
[INFO] [stdout]    --> src/png_embed/block.rs:355:8
[INFO] [stdout]     |
[INFO] [stdout] 355 |             let byte = it.next().unwrap();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `png_data` (bin "png_data") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f1f52061c3475b050561f8a9174c222daba0c09eab315d86dc7936cd4edbdf29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1f52061c3475b050561f8a9174c222daba0c09eab315d86dc7936cd4edbdf29", kill_on_drop: false }`
[INFO] [stdout] f1f52061c3475b050561f8a9174c222daba0c09eab315d86dc7936cd4edbdf29
