[INFO] fetching crate rkpi2 0.1.2...
[INFO] building rkpi2-0.1.2 against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] extracting crate rkpi2 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rkpi2 0.1.2 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 rkpi2 0.1.2
[INFO] finished tweaking crates.io crate rkpi2 0.1.2
[INFO] tweaked toml for crates.io crate rkpi2 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding os_pipe v0.9.2 (available: v1.2.2)
[INFO] [stderr]       Adding zstd v0.5.4+zstd.1.4.7 (available: v0.13.3)
[INFO] [stderr]       Adding zstd-sys v1.4.18+zstd.1.4.7 (available: v1.6.3+zstd.1.5.2)
[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] warning: version requirement `0.5.1+zstd.1.4.4` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91bf696858b7f40fab54bed8113fba52d4469faa732de87707444c657fa5386a
[INFO] running `Command { std: "docker" "start" "-a" "91bf696858b7f40fab54bed8113fba52d4469faa732de87707444c657fa5386a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91bf696858b7f40fab54bed8113fba52d4469faa732de87707444c657fa5386a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91bf696858b7f40fab54bed8113fba52d4469faa732de87707444c657fa5386a", kill_on_drop: false }`
[INFO] [stdout] 91bf696858b7f40fab54bed8113fba52d4469faa732de87707444c657fa5386a
[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=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] 1bc975bc1f63a3a09eb170ca6da259188ab50f60a9b70aa61fc1a7d1ef1f8691
[INFO] running `Command { std: "docker" "start" "-a" "1bc975bc1f63a3a09eb170ca6da259188ab50f60a9b70aa61fc1a7d1ef1f8691", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.5.1+zstd.1.4.4` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling glob v0.3.2
[INFO] [stderr]    Compiling zstd-safe v2.0.6+zstd.1.4.7
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling jobserver v0.1.33
[INFO] [stderr]    Compiling cc v1.2.26
[INFO] [stderr]    Compiling zstd-sys v1.4.18+zstd.1.4.7
[INFO] [stderr]    Compiling zstd v0.5.4+zstd.1.4.7
[INFO] [stderr]    Compiling rkpi2 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `SAMPLERATES` is never used
[INFO] [stdout]   --> src/lib.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 | const SAMPLERATES: [u32; 8] = [
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mux` is never used
[INFO] [stdout]   --> src/lib.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn mux(w: Box<dyn Write>, h: Hdr, lev: Option<u8>)
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demux` is never used
[INFO] [stdout]   --> src/lib.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn demux(r: Box<dyn Read>)
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:14
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Some(S) => S as u8,
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `L` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 |         Some(L) => match Encoder::new(w, L as i32)
[INFO] [stdout]    |              ^ help: convert the identifier to snake case: `l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `C` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         { Ok(C) => Ok(Box::new(C)),
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:27
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |                           ^ help: convert the identifier to snake case: `e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `D` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:99:18
[INFO] [stdout]    |
[INFO] [stdout] 99 |             { Ok(D) => Ok((Box::new(D), h)),
[INFO] [stdout]    |                  ^ help: convert the identifier to snake case: `d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.77s
[INFO] running `Command { std: "docker" "inspect" "1bc975bc1f63a3a09eb170ca6da259188ab50f60a9b70aa61fc1a7d1ef1f8691", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bc975bc1f63a3a09eb170ca6da259188ab50f60a9b70aa61fc1a7d1ef1f8691", kill_on_drop: false }`
[INFO] [stdout] 1bc975bc1f63a3a09eb170ca6da259188ab50f60a9b70aa61fc1a7d1ef1f8691
[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=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] 57bf68807d06a32b0c1d94d4c77c87bfff48f98cf39d43d77e41486216184cc9
[INFO] running `Command { std: "docker" "start" "-a" "57bf68807d06a32b0c1d94d4c77c87bfff48f98cf39d43d77e41486216184cc9", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.5.1+zstd.1.4.4` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]    Compiling os_pipe v0.9.2
[INFO] [stdout] warning: constant `SAMPLERATES` is never used
[INFO] [stdout]   --> src/lib.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 | const SAMPLERATES: [u32; 8] = [
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mux` is never used
[INFO] [stdout]   --> src/lib.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn mux(w: Box<dyn Write>, h: Hdr, lev: Option<u8>)
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demux` is never used
[INFO] [stdout]   --> src/lib.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn demux(r: Box<dyn Read>)
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:14
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Some(S) => S as u8,
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `L` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 |         Some(L) => match Encoder::new(w, L as i32)
[INFO] [stdout]    |              ^ help: convert the identifier to snake case: `l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `C` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         { Ok(C) => Ok(Box::new(C)),
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:27
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |                           ^ help: convert the identifier to snake case: `e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `D` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:99:18
[INFO] [stdout]    |
[INFO] [stdout] 99 |             { Ok(D) => Ok((Box::new(D), h)),
[INFO] [stdout]    |                  ^ help: convert the identifier to snake case: `d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rkpi2 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:14
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Some(S) => S as u8,
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `L` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 |         Some(L) => match Encoder::new(w, L as i32)
[INFO] [stdout]    |              ^ help: convert the identifier to snake case: `l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `C` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         { Ok(C) => Ok(Box::new(C)),
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |              ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:89:27
[INFO] [stdout]    |
[INFO] [stdout] 89 |         { Ok(F) => F, Err(E) => { return Err(E) } };
[INFO] [stdout]    |                           ^ help: convert the identifier to snake case: `e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `D` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:99:18
[INFO] [stdout]    |
[INFO] [stdout] 99 |             { Ok(D) => Ok((Box::new(D), h)),
[INFO] [stdout]    |                  ^ help: convert the identifier to snake case: `d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "57bf68807d06a32b0c1d94d4c77c87bfff48f98cf39d43d77e41486216184cc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57bf68807d06a32b0c1d94d4c77c87bfff48f98cf39d43d77e41486216184cc9", kill_on_drop: false }`
[INFO] [stdout] 57bf68807d06a32b0c1d94d4c77c87bfff48f98cf39d43d77e41486216184cc9