[INFO] fetching crate buildkit-llb 0.2.0...
[INFO] testing buildkit-llb-0.2.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate buildkit-llb 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate buildkit-llb 0.2.0
[INFO] finished tweaking crates.io crate buildkit-llb 0.2.0
[INFO] tweaked toml for crates.io crate buildkit-llb 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate buildkit-llb 0.2.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate buildkit-llb 0.2.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded which v3.1.0
[INFO] [stderr]   Downloaded buildkit-proto v0.2.0
[INFO] [stderr]   Downloaded multimap v0.8.0
[INFO] [stderr]   Downloaded tonic-build v0.1.1
[INFO] [stderr]   Downloaded tracing-futures v0.2.3
[INFO] [stderr]   Downloaded tower-limit v0.3.0
[INFO] [stderr]   Downloaded tracing-attributes v0.1.7
[INFO] [stderr]   Downloaded tower-util v0.3.0
[INFO] [stderr]   Downloaded tracing-core v0.1.10
[INFO] [stderr]   Downloaded tonic v0.1.1
[INFO] [stderr]   Downloaded tracing v0.1.13
[INFO] [stderr]   Downloaded petgraph v0.5.0
[INFO] [stderr]   Downloaded aho-corasick v0.7.9
[INFO] [stderr]   Downloaded h2 v0.2.2
[INFO] [stderr]   Downloaded hyper v0.13.3
[INFO] [stderr]   Downloaded tokio v0.2.13
[INFO] [stderr]   Downloaded backtrace-sys v0.1.33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d79b764a4005d17528df1e13f6f2da35f09925d60db29e1efeb1c4befefa824d
[INFO] running `Command { std: "docker" "start" "-a" "d79b764a4005d17528df1e13f6f2da35f09925d60db29e1efeb1c4befefa824d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d79b764a4005d17528df1e13f6f2da35f09925d60db29e1efeb1c4befefa824d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79b764a4005d17528df1e13f6f2da35f09925d60db29e1efeb1c4befefa824d", kill_on_drop: false }`
[INFO] [stdout] d79b764a4005d17528df1e13f6f2da35f09925d60db29e1efeb1c4befefa824d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 96b395e1daf069ed3b142dfa3cad4bb2c6ac043eb825fd7ecd8fa5efe09cd16c
[INFO] running `Command { std: "docker" "start" "-a" "96b395e1daf069ed3b142dfa3cad4bb2c6ac043eb825fd7ecd8fa5efe09cd16c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.4
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling tower-layer v0.3.0
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling tracing-core v0.1.10
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling http v0.2.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling multimap v0.8.0
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling try-lock v0.2.2
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling which v3.1.0
[INFO] [stderr]    Compiling petgraph v0.5.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling tokio v0.2.13
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling aho-corasick v0.7.9
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling regex-syntax v0.6.16
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling tower-ready-cache v0.3.1
[INFO] [stderr]    Compiling tower-make v0.3.0
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling h2 v0.2.2
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling async-trait v0.1.24
[INFO] [stderr]    Compiling async-stream v0.2.1
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling tracing v0.1.13
[INFO] [stderr]    Compiling pin-project v0.4.8
[INFO] [stderr]    Compiling tower-discover v0.3.0
[INFO] [stderr]    Compiling tower-timeout v0.3.0
[INFO] [stderr]    Compiling tower-util v0.3.0
[INFO] [stderr]    Compiling tower-retry v0.3.0
[INFO] [stderr]    Compiling tower-buffer v0.3.0
[INFO] [stderr]    Compiling tower-limit v0.3.0
[INFO] [stderr]    Compiling tower-load-shed v0.3.0
[INFO] [stderr]    Compiling hyper v0.13.3
[INFO] [stderr]    Compiling tracing-futures v0.2.3
[INFO] [stderr]    Compiling tower-load v0.3.0
[INFO] [stderr]    Compiling tower-balance v0.3.0
[INFO] [stderr]    Compiling tower v0.3.1
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]    Compiling tonic v0.1.1
[INFO] [stderr]    Compiling tonic-build v0.1.1
[INFO] [stderr]    Compiling buildkit-proto v0.2.0
[INFO] [stderr]    Compiling buildkit-llb v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: fields `description` and `caps` are never read
[INFO] [stdout]   --> src/ops/fs/mkdir.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct MakeDirOperation<'a> {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     description: HashMap<String, String>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 20 |     caps: HashMap<String, bool>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MakeDirOperation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: fields `description` and `caps` are never read
[INFO] [stdout]   --> src/ops/fs/mkfile.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct MakeFileOperation<'a> {
[INFO] [stdout]    |            ----------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     description: HashMap<String, String>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 20 |     caps: HashMap<String, bool>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MakeFileOperation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/ops/fs/copy.rs:51:44
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn from<P>(self, source: LayerPath<'_, P>) -> OpWithSource
[INFO] [stdout]    |                                            ^^         ------------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                            |
[INFO] [stdout]    |                                            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: one option is to consistently use `'_`
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn from<P>(self, source: LayerPath<'_, P>) -> OpWithSource<'_>
[INFO] [stdout]    |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `buildkit-llb` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "96b395e1daf069ed3b142dfa3cad4bb2c6ac043eb825fd7ecd8fa5efe09cd16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96b395e1daf069ed3b142dfa3cad4bb2c6ac043eb825fd7ecd8fa5efe09cd16c", kill_on_drop: false }`
[INFO] [stdout] 96b395e1daf069ed3b142dfa3cad4bb2c6ac043eb825fd7ecd8fa5efe09cd16c