[INFO] fetching crate qoiconv 0.1.0...
[INFO] building qoiconv-0.1.0 against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] extracting crate qoiconv 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate qoiconv 0.1.0 on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qoiconv 0.1.0
[INFO] finished tweaking crates.io crate qoiconv 0.1.0
[INFO] tweaked toml for crates.io crate qoiconv 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate qoiconv 0.1.0 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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jpeg-decoder v0.2.5
[INFO] [stderr]   Downloaded libqoi v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22aea0a5da24697f23ef913565c9cb1994173e1e9b6b126a3fca64c5cc8b84f3
[INFO] running `Command { std: "docker" "start" "-a" "22aea0a5da24697f23ef913565c9cb1994173e1e9b6b126a3fca64c5cc8b84f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22aea0a5da24697f23ef913565c9cb1994173e1e9b6b126a3fca64c5cc8b84f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22aea0a5da24697f23ef913565c9cb1994173e1e9b6b126a3fca64c5cc8b84f3", kill_on_drop: false }`
[INFO] [stdout] 22aea0a5da24697f23ef913565c9cb1994173e1e9b6b126a3fca64c5cc8b84f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc9615d8225ba61bbef73e1a741bb39a11e68b402316d0a9ec0296f9b98904b5
[INFO] running `Command { std: "docker" "start" "-a" "cc9615d8225ba61bbef73e1a741bb39a11e68b402316d0a9ec0296f9b98904b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling rayon-core v1.9.2
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling weezl v0.1.6
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.5.1
[INFO] [stderr]    Compiling deflate v1.0.0
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling lebe v0.5.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling gif v0.11.3
[INFO] [stderr]    Compiling bytemuck v1.9.1
[INFO] [stderr]    Compiling libqoi v0.2.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling rayon v1.5.2
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling nanorand v0.7.0
[INFO] [stderr]    Compiling spin v0.9.3
[INFO] [stderr]    Compiling flate2 v1.0.23
[INFO] [stderr]    Compiling png v0.17.5
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling jpeg-decoder v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling tiff v0.7.2
[INFO] [stderr]    Compiling pin-project v1.0.10
[INFO] [stderr]    Compiling flume v0.10.12
[INFO] [stderr]    Compiling exr v1.4.2
[INFO] [stderr]    Compiling image v0.24.2
[INFO] [stderr]    Compiling qoiconv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `img` is never read
[INFO] [stdout]   --> src/main.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut img = None;
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `res` is never read
[INFO] [stdout]   --> src/main.rs:25:10
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut res = None;
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.08s
[INFO] running `Command { std: "docker" "inspect" "cc9615d8225ba61bbef73e1a741bb39a11e68b402316d0a9ec0296f9b98904b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc9615d8225ba61bbef73e1a741bb39a11e68b402316d0a9ec0296f9b98904b5", kill_on_drop: false }`
[INFO] [stdout] cc9615d8225ba61bbef73e1a741bb39a11e68b402316d0a9ec0296f9b98904b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3244046be426fd8f6267568c4dd7bebac779bdbd60dbff9a21e57fee7e3f2f7c
[INFO] running `Command { std: "docker" "start" "-a" "3244046be426fd8f6267568c4dd7bebac779bdbd60dbff9a21e57fee7e3f2f7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling qoiconv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `img` is never read
[INFO] [stdout]   --> src/main.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut img = None;
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `res` is never read
[INFO] [stdout]   --> src/main.rs:25:10
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut res = None;
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "3244046be426fd8f6267568c4dd7bebac779bdbd60dbff9a21e57fee7e3f2f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3244046be426fd8f6267568c4dd7bebac779bdbd60dbff9a21e57fee7e3f2f7c", kill_on_drop: false }`
[INFO] [stdout] 3244046be426fd8f6267568c4dd7bebac779bdbd60dbff9a21e57fee7e3f2f7c