[INFO] fetching crate vignette 0.1.0...
[INFO] checking vignette-0.1.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate vignette 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate vignette 0.1.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vignette 0.1.0
[INFO] finished tweaking crates.io crate vignette 0.1.0
[INFO] tweaked toml for crates.io crate vignette 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate vignette 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 014b425037b8242159d94b90abe6bdd772238e889da6faf1a002ceeb05546046
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "014b425037b8242159d94b90abe6bdd772238e889da6faf1a002ceeb05546046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "014b425037b8242159d94b90abe6bdd772238e889da6faf1a002ceeb05546046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "014b425037b8242159d94b90abe6bdd772238e889da6faf1a002ceeb05546046", kill_on_drop: false }`
[INFO] [stdout] 014b425037b8242159d94b90abe6bdd772238e889da6faf1a002ceeb05546046
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fc63cb215efef96c7f6e14c29c7f58b13121dd4606b51a33a450f053ea60086
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9fc63cb215efef96c7f6e14c29c7f58b13121dd4606b51a33a450f053ea60086", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.20
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking if_chain v0.1.3
[INFO] [stderr]    Compiling vignette v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking dmsort v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking miniz_oxide v0.4.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling symbolic-demangle v5.7.8
[INFO] [stderr]    Compiling unwind-sys v0.1.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling cpp_demangle v0.2.16
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking msvc-demangler v0.7.0
[INFO] [stderr]     Checking gimli v0.16.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]    Compiling scroll v0.9.2
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking debugid v0.3.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling scroll_derive v0.9.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking goblin v0.0.19
[INFO] [stderr]     Checking goblin v0.0.17
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking symbolic-common v5.7.8
[INFO] [stderr]     Checking symbolic-debuginfo v5.7.8
[INFO] [stderr]     Checking threadinfo v0.1.0
[INFO] [stderr]     Checking symbolic-symcache v5.7.8
[INFO] [stdout] warning: unused imports: `fs`, `process`
[INFO] [stdout]   --> src/lib_linux.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{cell::UnsafeCell, fs, io, mem, process};
[INFO] [stdout]    |                             ^^           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs`, `process`
[INFO] [stdout]   --> src/lib_linux.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{cell::UnsafeCell, fs, io, mem, process};
[INFO] [stdout]    |                             ^^           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/module_cache/linux.rs:68:57
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut mod_info: libc::Dl_info = unsafe { mem::uninitialized() };
[INFO] [stdout]    |                                                         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/module_cache/linux.rs:68:57
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut mod_info: libc::Dl_info = unsafe { mem::uninitialized() };
[INFO] [stdout]    |                                                         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/generate_symbols.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     output_file.write(&output.stdout);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/generate_symbols.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     output_file.write(&output.stdout);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/speedscope.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     serde_json::to_writer_pretty(stdout.lock(), &speed);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/resolve.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |                     writeln!(std::io::stderr(), "{:?}", e);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/speedscope.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     serde_json::to_writer_pretty(stdout.lock(), &speed);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/resolve.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |                     writeln!(std::io::stderr(), "{:?}", e);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.86s
[INFO] running `Command { std: "docker" "inspect" "9fc63cb215efef96c7f6e14c29c7f58b13121dd4606b51a33a450f053ea60086", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fc63cb215efef96c7f6e14c29c7f58b13121dd4606b51a33a450f053ea60086", kill_on_drop: false }`
[INFO] [stdout] 9fc63cb215efef96c7f6e14c29c7f58b13121dd4606b51a33a450f053ea60086