[INFO] fetching crate dynstack 0.4.0... [INFO] checking dynstack-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] extracting crate dynstack 0.4.0 into /workspace/builds/worker-2-tc1/source [INFO] validating manifest of crates.io crate dynstack 0.4.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate dynstack 0.4.0 [INFO] finished tweaking crates.io crate dynstack 0.4.0 [INFO] tweaked toml for crates.io crate dynstack 0.4.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 69 packages [INFO] [stderr] Adding bitflags v1.3.2 (latest: v2.5.0) [INFO] [stderr] Adding cast v0.1.0 (latest: v0.3.0) [INFO] [stderr] Adding cfg-if v0.1.10 (latest: v1.0.0) [INFO] [stderr] Adding clap v2.34.0 (latest: v4.5.4) [INFO] [stderr] Adding criterion v0.1.2 (latest: v0.5.1) [INFO] [stderr] Adding criterion-plot v0.1.3 (latest: v0.5.0) [INFO] [stderr] Adding criterion-stats v0.1.3 (latest: v0.3.0) [INFO] [stderr] Adding hermit-abi v0.1.19 (latest: v0.3.9) [INFO] [stderr] Adding isatty v0.1.9 (latest: v0.2.0) [INFO] [stderr] Adding itertools v0.4.19 (latest: v0.12.1) [INFO] [stderr] Adding itertools v0.5.10 (latest: v0.12.1) [INFO] [stderr] Adding log v0.3.9 (latest: v0.4.21) [INFO] [stderr] Adding num-traits v0.1.43 (latest: v0.2.18) [INFO] [stderr] Adding num_cpus v0.2.13 (latest: v1.16.0) [INFO] [stderr] Adding object v0.32.2 (latest: v0.34.0) [INFO] [stderr] Adding rand v0.3.23 (latest: v0.8.5) [INFO] [stderr] Adding rand v0.4.6 (latest: v0.8.5) [INFO] [stderr] Adding rand_core v0.3.1 (latest: v0.6.4) [INFO] [stderr] Adding rand_core v0.4.2 (latest: v0.6.4) [INFO] [stderr] Adding rdrand v0.4.0 (latest: v0.8.3) [INFO] [stderr] Adding redox_syscall v0.1.57 (latest: v0.5.1) [INFO] [stderr] Adding simplelog v0.4.4 (latest: v0.12.2) [INFO] [stderr] Adding strsim v0.8.0 (latest: v0.11.1) [INFO] [stderr] Adding syn v1.0.109 (latest: v2.0.58) [INFO] [stderr] Adding synstructure v0.12.6 (latest: v0.13.1) [INFO] [stderr] Adding term v0.4.6 (latest: v0.7.0) [INFO] [stderr] Adding textwrap v0.11.0 (latest: v0.16.1) [INFO] [stderr] Adding time v0.1.45 (latest: v0.3.34) [INFO] [stderr] Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0) [INFO] [stderr] Adding winapi v0.2.8 (latest: v0.3.9) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded isatty v0.1.9 [INFO] [stderr] Downloaded term v0.4.6 [INFO] [stderr] Downloaded num_cpus v0.2.13 [INFO] [stderr] Downloaded thread-scoped v1.0.2 [INFO] [stderr] Downloaded criterion-stats v0.1.3 [INFO] [stderr] Downloaded simplelog v0.4.4 [INFO] [stderr] Downloaded itertools v0.5.10 [INFO] [stderr] Downloaded criterion-plot v0.1.3 [INFO] [stderr] Downloaded cast v0.1.0 [INFO] [stderr] Downloaded itertools v0.4.19 [INFO] [stderr] Downloaded criterion v0.1.2 [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8c4dd237e767fb8100ceb5efb06723ca5ad85e5c494908c75f00c2aee8f2565d [INFO] running `Command { std: "docker" "start" "-a" "8c4dd237e767fb8100ceb5efb06723ca5ad85e5c494908c75f00c2aee8f2565d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8c4dd237e767fb8100ceb5efb06723ca5ad85e5c494908c75f00c2aee8f2565d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8c4dd237e767fb8100ceb5efb06723ca5ad85e5c494908c75f00c2aee8f2565d", kill_on_drop: false }` [INFO] [stdout] 8c4dd237e767fb8100ceb5efb06723ca5ad85e5c494908c75f00c2aee8f2565d [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ef7534d0000a82c84220b772c553a0800b7ac2fe4c1c5c19573aff8c5f49d0e0 [INFO] running `Command { std: "docker" "start" "-a" "ef7534d0000a82c84220b772c553a0800b7ac2fe4c1c5c19573aff8c5f49d0e0", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Checking cast v0.1.0 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking num_cpus v0.2.13 [INFO] [stderr] Checking itertools v0.5.10 [INFO] [stderr] Compiling dynstack v0.4.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking ansi_term v0.12.1 [INFO] [stderr] Checking term v0.4.6 [INFO] [stderr] Checking thread-scoped v1.0.2 [INFO] [stderr] Checking num-traits v0.1.43 [INFO] [stderr] Checking isatty v0.1.9 [INFO] [stderr] Checking itertools v0.4.19 [INFO] [stderr] Checking clap v2.34.0 [INFO] [stderr] Checking simplelog v0.4.4 [INFO] [stdout] warning: the item `Vec` is imported redundantly [INFO] [stdout] --> src/lib.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | vec::Vec, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Vec` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking criterion-plot v0.1.3 [INFO] [stderr] Checking criterion-stats v0.1.3 [INFO] [stderr] Compiling synstructure v0.12.6 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Checking failure v0.1.8 [INFO] [stderr] Checking criterion v0.1.2 [INFO] [stdout] warning: the item `Vec` is imported redundantly [INFO] [stdout] --> src/lib.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | vec::Vec, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Vec` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:484:6 [INFO] [stdout] | [INFO] [stdout] 484 | }; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> benches/comparisons.rs:7:14 [INFO] [stdout] | [INFO] [stdout] 7 | struct Large([u8; 950]); [INFO] [stdout] | ----- ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` 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] 7 | struct Large(()); [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u8` [INFO] [stdout] ... [INFO] [stdout] 414 | dyn_push!(stack, 1u8); [INFO] [stdout] | --------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: `#[warn(forgetting_copy_types)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u32` [INFO] [stdout] ... [INFO] [stdout] 415 | dyn_push!(stack, 1u32); [INFO] [stdout] | ---------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u16` [INFO] [stdout] ... [INFO] [stdout] 416 | dyn_push!(stack, 1u16); [INFO] [stdout] | ---------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u64` [INFO] [stdout] ... [INFO] [stdout] 417 | dyn_push!(stack, 1u64); [INFO] [stdout] | ---------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u128` [INFO] [stdout] ... [INFO] [stdout] 418 | dyn_push!(stack, 1u128); [INFO] [stdout] | ----------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `{closure@src/lib.rs:458:26: 458:33}` [INFO] [stdout] ... [INFO] [stdout] 458 | dyn_push!(stack, move || i); [INFO] [stdout] | --------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u32` [INFO] [stdout] ... [INFO] [stdout] 576 | 0 => dyn_push!(stack, 0xF0B0D0E0u32), [INFO] [stdout] | ------------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `u64` [INFO] [stdout] ... [INFO] [stdout] 577 | 1 => dyn_push!(stack, 0x01020304F0B0D0E0u64), [INFO] [stdout] | --------------------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::forget` with a value that implements `Copy` does nothing [INFO] [stdout] --> src/lib.rs:405:9 [INFO] [stdout] | [INFO] [stdout] 405 | core::mem::forget(t); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `{closure@src/lib.rs:693:26: 693:33}` [INFO] [stdout] ... [INFO] [stdout] 693 | dyn_push!(stack, move || i); [INFO] [stdout] | --------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: use `let _ = ...` to ignore the expression or result [INFO] [stdout] = note: this warning originates in the macro `dyn_push` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.46s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.1.2 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "ef7534d0000a82c84220b772c553a0800b7ac2fe4c1c5c19573aff8c5f49d0e0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ef7534d0000a82c84220b772c553a0800b7ac2fe4c1c5c19573aff8c5f49d0e0", kill_on_drop: false }` [INFO] [stdout] ef7534d0000a82c84220b772c553a0800b7ac2fe4c1c5c19573aff8c5f49d0e0