[INFO] fetching crate fimg 0.4.0...
[INFO] checking fimg-0.4.0 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] extracting crate fimg 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate fimg 0.4.0 on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate fimg 0.4.0
[INFO] finished tweaking crates.io crate fimg 0.4.0
[INFO] tweaked toml for crates.io crate fimg 0.4.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c557248475176b47e28f9ab0a33050bdaa30d6b4a06eb9562e6859ba514b754
[INFO] running `Command { std: "docker" "start" "-a" "8c557248475176b47e28f9ab0a33050bdaa30d6b4a06eb9562e6859ba514b754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c557248475176b47e28f9ab0a33050bdaa30d6b4a06eb9562e6859ba514b754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c557248475176b47e28f9ab0a33050bdaa30d6b4a06eb9562e6859ba514b754", kill_on_drop: false }`
[INFO] [stdout] 8c557248475176b47e28f9ab0a33050bdaa30d6b4a06eb9562e6859ba514b754
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 745cbb6258ef06ee2ddc306dfb60ede07f6180e8777787abdfcb595c18cde090
[INFO] running `Command { std: "docker" "start" "-a" "745cbb6258ef06ee2ddc306dfb60ede07f6180e8777787abdfcb595c18cde090", kill_on_drop: false }`
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking iai v0.1.1
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking fdeflate v0.3.0
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking png v0.17.10
[INFO] [stderr]     Checking fimg v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `self.buffer` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:247:18
[INFO] [stdout]     |
[INFO] [stdout] 245 |         let idx = unsafe { self.slice(x, y) };
[INFO] [stdout]     |                            ---- immutable borrow occurs here
[INFO] [stdout] 246 |         // SAFETY: slice should always return a valid index
[INFO] [stdout] 247 |         unsafe { self.buffer.get_unchecked_mut(idx) }
[INFO] [stdout]     |                  ^^^^^^^^^^^                   --- immutable borrow later used here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `self.buffer` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:247:18
[INFO] [stdout]     |
[INFO] [stdout] 245 |         let idx = unsafe { self.slice(x, y) };
[INFO] [stdout]     |                            ---- immutable borrow occurs here
[INFO] [stdout] 246 |         // SAFETY: slice should always return a valid index
[INFO] [stdout] 247 |         unsafe { self.buffer.get_unchecked_mut(idx) }
[INFO] [stdout]     |                  ^^^^^^^^^^^                   --- immutable borrow later used here
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fimg` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fimg` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "745cbb6258ef06ee2ddc306dfb60ede07f6180e8777787abdfcb595c18cde090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "745cbb6258ef06ee2ddc306dfb60ede07f6180e8777787abdfcb595c18cde090", kill_on_drop: false }`
[INFO] [stdout] 745cbb6258ef06ee2ddc306dfb60ede07f6180e8777787abdfcb595c18cde090