[INFO] fetching crate png-glitch 0.3.1...
[INFO] checking png-glitch-0.3.1 against try#31561a63598a0f21fc74c024747ef1310fdd2eb2 for pr-133536
[INFO] extracting crate png-glitch 0.3.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate png-glitch 0.3.1 on toolchain 31561a63598a0f21fc74c024747ef1310fdd2eb2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31561a63598a0f21fc74c024747ef1310fdd2eb2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate png-glitch 0.3.1
[INFO] finished tweaking crates.io crate png-glitch 0.3.1
[INFO] tweaked toml for crates.io crate png-glitch 0.3.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31561a63598a0f21fc74c024747ef1310fdd2eb2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31561a63598a0f21fc74c024747ef1310fdd2eb2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+31561a63598a0f21fc74c024747ef1310fdd2eb2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df21ff62004fff4a468c7ece7824fe7f74fa867805858d80c84c24034d7cc5ba
[INFO] running `Command { std: "docker" "start" "-a" "df21ff62004fff4a468c7ece7824fe7f74fa867805858d80c84c24034d7cc5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df21ff62004fff4a468c7ece7824fe7f74fa867805858d80c84c24034d7cc5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df21ff62004fff4a468c7ece7824fe7f74fa867805858d80c84c24034d7cc5ba", kill_on_drop: false }`
[INFO] [stdout] df21ff62004fff4a468c7ece7824fe7f74fa867805858d80c84c24034d7cc5ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+31561a63598a0f21fc74c024747ef1310fdd2eb2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed79598d148a378d0886cda7655420729ebe45606abce9e43214bdad9c7aa69b
[INFO] running `Command { std: "docker" "start" "-a" "ed79598d148a378d0886cda7655420729ebe45606abce9e43214bdad9c7aa69b", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]     Checking crc32fast v1.4.2
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking fdeflate v0.3.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]     Checking png-glitch v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0596]: cannot borrow `scan_line` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> src/png/scan_line.rs:209:13
[INFO] [stdout]     |
[INFO] [stdout] 209 |             scan_line[0] = 10;
[INFO] [stdout]     |             ^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]     |
[INFO] [stdout] 207 |             let mut scan_line = target.scan_line();
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/png/scan_line.rs:222:17
[INFO] [stdout]     |
[INFO] [stdout] 222 |             let mut target = TestTarget::new();
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/png/scan_line.rs:235:17
[INFO] [stdout]     |
[INFO] [stdout] 235 |             let mut target = TestTarget::new();
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/png/scan_line.rs:252:17
[INFO] [stdout]     |
[INFO] [stdout] 252 |             let mut target = TestTarget::new();
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `png-glitch` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ed79598d148a378d0886cda7655420729ebe45606abce9e43214bdad9c7aa69b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed79598d148a378d0886cda7655420729ebe45606abce9e43214bdad9c7aa69b", kill_on_drop: false }`
[INFO] [stdout] ed79598d148a378d0886cda7655420729ebe45606abce9e43214bdad9c7aa69b
