[INFO] cloning repository https://github.com/reese/rox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reese/rox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freese%2Frox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freese%2Frox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d5570e71d1b1b51c7b55738daf742272c48042ac
[INFO] checking reese/rox against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freese%2Frox" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/reese/rox
[INFO] finished tweaking git repo https://github.com/reese/rox
[INFO] tweaked toml for git repo https://github.com/reese/rox written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/reese/rox on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/reese/rox 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b0cc0b90486ae98ee91f401dc5df95204f2b33fbccbc7047a29fa5fddb686a1
[INFO] running `Command { std: "docker" "start" "-a" "5b0cc0b90486ae98ee91f401dc5df95204f2b33fbccbc7047a29fa5fddb686a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b0cc0b90486ae98ee91f401dc5df95204f2b33fbccbc7047a29fa5fddb686a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0cc0b90486ae98ee91f401dc5df95204f2b33fbccbc7047a29fa5fddb686a1", kill_on_drop: false }`
[INFO] [stdout] 5b0cc0b90486ae98ee91f401dc5df95204f2b33fbccbc7047a29fa5fddb686a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2651174314fe5de7cb649533a4e37169952376f3cbf3f68a8f43b0aa941ce24a
[INFO] running `Command { std: "docker" "start" "-a" "2651174314fe5de7cb649533a4e37169952376f3cbf3f68a8f43b0aa941ce24a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.42
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling smallvec v1.9.0
[INFO] [stderr]    Compiling serde v1.0.141
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling once_cell v1.13.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=master#25b9fc58)
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling serde_json v1.0.82
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]    Compiling string_cache v0.8.4
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.141
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking lalrpop-util v0.19.8
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking plotters-svg v0.3.2
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking plotters v0.3.2
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]    Compiling lalrpop v0.19.8
[INFO] [stderr]    Compiling llvm-sys v100.2.3
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling inkwell_internals v0.5.0 (https://github.com/TheDan64/inkwell?branch=master#25b9fc58)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]    Compiling rox-lang v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/roxc/parser/syntax.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     DotAccess(Box<Expression>, Identifier),
[INFO] [stdout]    |     --------- ^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are 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 fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 28 -     DotAccess(Box<Expression>, Identifier),
[INFO] [stdout] 28 +     DotAccess((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/roxc/function_translator.rs:43:24
[INFO] [stdout]    |
[INFO] [stdout] 43 |         match statement.borrow() {
[INFO] [stdout]    |                        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `tagged_syntax::TaggedStatement` does not implement `Borrow`, so calling `borrow` on `&tagged_syntax::TaggedStatement` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 43 -         match statement.borrow() {
[INFO] [stdout] 43 +         match statement {
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `tagged_syntax::TaggedStatement`, implement `Clone` for it
[INFO] [stdout]   --> src/roxc/semant/tagged_syntax.rs:82:1
[INFO] [stdout]    |
[INFO] [stdout] 82 + #[derive(Clone)]
[INFO] [stdout] 83 | pub(crate) enum TaggedStatement {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/roxc/parser/syntax.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     DotAccess(Box<Expression>, Identifier),
[INFO] [stdout]    |     --------- ^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are 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 fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 28 -     DotAccess(Box<Expression>, Identifier),
[INFO] [stdout] 28 +     DotAccess((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/roxc/function_translator.rs:43:24
[INFO] [stdout]    |
[INFO] [stdout] 43 |         match statement.borrow() {
[INFO] [stdout]    |                        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `tagged_syntax::TaggedStatement` does not implement `Borrow`, so calling `borrow` on `&tagged_syntax::TaggedStatement` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 43 -         match statement.borrow() {
[INFO] [stdout] 43 +         match statement {
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `tagged_syntax::TaggedStatement`, implement `Clone` for it
[INFO] [stdout]   --> src/roxc/semant/tagged_syntax.rs:82:1
[INFO] [stdout]    |
[INFO] [stdout] 82 + #[derive(Clone)]
[INFO] [stdout] 83 | pub(crate) enum TaggedStatement {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/bin/rox.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | /         /// The name of the output executable
[INFO] [stdout] 20 | |         #[structopt(short, long)]
[INFO] [stdout] 21 | |         output: PathBuf,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rox-lang` (bin "rox") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/bin/rox.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | /         /// The name of the output executable
[INFO] [stdout] 20 | |         #[structopt(short, long)]
[INFO] [stdout] 21 | |         output: PathBuf,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rox-lang` (bin "rox" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2651174314fe5de7cb649533a4e37169952376f3cbf3f68a8f43b0aa941ce24a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2651174314fe5de7cb649533a4e37169952376f3cbf3f68a8f43b0aa941ce24a", kill_on_drop: false }`
[INFO] [stdout] 2651174314fe5de7cb649533a4e37169952376f3cbf3f68a8f43b0aa941ce24a