[INFO] fetching crate ra-ap-rustc_type_ir 0.139.0...
[INFO] checking ra-ap-rustc_type_ir-0.139.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate ra-ap-rustc_type_ir 0.139.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate ra-ap-rustc_type_ir 0.139.0
[INFO] finished tweaking crates.io crate ra-ap-rustc_type_ir 0.139.0
[INFO] tweaked toml for crates.io crate ra-ap-rustc_type_ir 0.139.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ra-ap-rustc_type_ir 0.139.0 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 crates.io crate ra-ap-rustc_type_ir 0.139.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3a51002a5d3b685bfe9c30e6a5a9254965ba7d141d2a76f811418634bfc2f732
[INFO] running `Command { std: "docker" "start" "-a" "3a51002a5d3b685bfe9c30e6a5a9254965ba7d141d2a76f811418634bfc2f732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a51002a5d3b685bfe9c30e6a5a9254965ba7d141d2a76f811418634bfc2f732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a51002a5d3b685bfe9c30e6a5a9254965ba7d141d2a76f811418634bfc2f732", kill_on_drop: false }`
[INFO] [stdout] 3a51002a5d3b685bfe9c30e6a5a9254965ba7d141d2a76f811418634bfc2f732
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4663d63bd56f36f292091aab87d5b155094f69c8152873353e3263b7582f7d47
[INFO] running `Command { std: "docker" "start" "-a" "4663d63bd56f36f292091aab87d5b155094f69c8152873353e3263b7582f7d47", kill_on_drop: false }`
[INFO] [stderr]     Checking ena v0.14.3
[INFO] [stderr]     Checking thin-vec v0.2.14
[INFO] [stderr]     Checking ra-ap-rustc_ast_ir v0.139.0
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling ra-ap-rustc_index_macros v0.139.0
[INFO] [stderr]    Compiling derive-where v1.6.0
[INFO] [stderr]    Compiling ra-ap-rustc_type_ir_macros v0.139.0
[INFO] [stderr]     Checking ra-ap-rustc_index v0.139.0
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking ra-ap-rustc_type_ir v0.139.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ClosureKind` and `UnevaluatedConst`
[INFO] [stdout]  --> src/ir_print.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 |     AliasTerm, AliasTy, Binder, ClosureKind, CoercePredicate, ExistentialProjection,
[INFO] [stdout]   |                                 ^^^^^^^^^^^
[INFO] [stdout] 5 |     ExistentialTraitRef, FnSig, HostEffectPredicate, Interner, NormalizesTo, OutlivesPredicate,
[INFO] [stdout] 6 |     PatternKind, ProjectionPredicate, SubtypePredicate, TraitPredicate, TraitRef, UnevaluatedConst,
[INFO] [stdout]   |                                                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ClosureKind` and `UnevaluatedConst`
[INFO] [stdout]  --> src/ir_print.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 |     AliasTerm, AliasTy, Binder, ClosureKind, CoercePredicate, ExistentialProjection,
[INFO] [stdout]   |                                 ^^^^^^^^^^^
[INFO] [stdout] 5 |     ExistentialTraitRef, FnSig, HostEffectPredicate, Interner, NormalizesTo, OutlivesPredicate,
[INFO] [stdout] 6 |     PatternKind, ProjectionPredicate, SubtypePredicate, TraitPredicate, TraitRef, UnevaluatedConst,
[INFO] [stdout]   |                                                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Arc<T>, Infallible>
[INFO] [stdout]    --> src/fold.rs:308:15
[INFO] [stdout]     |
[INFO] [stdout] 308 |         match fold_arc::<T, Infallible>(self, |t| Ok(t.fold_with(folder))) {
[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 `ra-ap-rustc_type_ir` (lib test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Arc<T>, Infallible>
[INFO] [stdout]    --> src/fold.rs:308:15
[INFO] [stdout]     |
[INFO] [stdout] 308 |         match fold_arc::<T, Infallible>(self, |t| Ok(t.fold_with(folder))) {
[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 `ra-ap-rustc_type_ir` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4663d63bd56f36f292091aab87d5b155094f69c8152873353e3263b7582f7d47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4663d63bd56f36f292091aab87d5b155094f69c8152873353e3263b7582f7d47", kill_on_drop: false }`
[INFO] [stdout] 4663d63bd56f36f292091aab87d5b155094f69c8152873353e3263b7582f7d47
