[INFO] fetching crate mtree 0.5.0...
[INFO] building mtree-0.5.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate mtree 0.5.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mtree 0.5.0
[INFO] finished tweaking crates.io crate mtree 0.5.0
[INFO] tweaked toml for crates.io crate mtree 0.5.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mtree 0.5.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.9.4)
[INFO] [stderr]       Adding smallvec v0.6.14 (available: v1.15.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9321deb4fe14a8e49fe6657ac09bb9a35038626b6f6cf0cccd293aae4ded3b7
[INFO] running `Command { std: "docker" "start" "-a" "b9321deb4fe14a8e49fe6657ac09bb9a35038626b6f6cf0cccd293aae4ded3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9321deb4fe14a8e49fe6657ac09bb9a35038626b6f6cf0cccd293aae4ded3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9321deb4fe14a8e49fe6657ac09bb9a35038626b6f6cf0cccd293aae4ded3b7", kill_on_drop: false }`
[INFO] [stdout] b9321deb4fe14a8e49fe6657ac09bb9a35038626b6f6cf0cccd293aae4ded3b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa2cf1ee4dbe78c159c4042120ac958eb9514d1c2586f83ad89324c61a7b7df2
[INFO] running `Command { std: "docker" "start" "-a" "fa2cf1ee4dbe78c159c4042120ac958eb9514d1c2586f83ad89324c61a7b7df2", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling newtype_array v0.1.6
[INFO] [stderr]    Compiling mtree v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/parser.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Comment(&'a [u8]),
[INFO] [stdout]    |     ------- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MTreeLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 14 -     Comment(&'a [u8]),
[INFO] [stdout] 14 +     Comment(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "fa2cf1ee4dbe78c159c4042120ac958eb9514d1c2586f83ad89324c61a7b7df2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa2cf1ee4dbe78c159c4042120ac958eb9514d1c2586f83ad89324c61a7b7df2", kill_on_drop: false }`
[INFO] [stdout] fa2cf1ee4dbe78c159c4042120ac958eb9514d1c2586f83ad89324c61a7b7df2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f892a571b7db7479cdd7c99ae519823630533c0926a19114009a56274e19901
[INFO] running `Command { std: "docker" "start" "-a" "4f892a571b7db7479cdd7c99ae519823630533c0926a19114009a56274e19901", kill_on_drop: false }`
[INFO] [stderr]    Compiling mtree v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/parser.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Comment(&'a [u8]),
[INFO] [stdout]    |     ------- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MTreeLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 14 -     Comment(&'a [u8]),
[INFO] [stdout] 14 +     Comment(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/read_mtree.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() -> Result<(), Box<Error>> {
[INFO] [stdout]   |                             ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]   |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/parser.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Comment(&'a [u8]),
[INFO] [stdout]    |     ------- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MTreeLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 14 -     Comment(&'a [u8]),
[INFO] [stdout] 14 +     Comment(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "4f892a571b7db7479cdd7c99ae519823630533c0926a19114009a56274e19901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f892a571b7db7479cdd7c99ae519823630533c0926a19114009a56274e19901", kill_on_drop: false }`
[INFO] [stdout] 4f892a571b7db7479cdd7c99ae519823630533c0926a19114009a56274e19901
