[INFO] fetching crate z3 0.11.2...
[INFO] checking z3-0.11.2 against master#2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36 for pr-95819
[INFO] extracting crate z3 0.11.2 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate z3 0.11.2 on toolchain 2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate z3 0.11.2
[INFO] finished tweaking crates.io crate z3 0.11.2
[INFO] tweaked toml for crates.io crate z3 0.11.2 written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded z3-sys v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ef110ca7009729de1e5453ce2468b687e828f7c13be54d6b207eea7d9e3c133
[INFO] running `Command { std: "docker" "start" "-a" "9ef110ca7009729de1e5453ce2468b687e828f7c13be54d6b207eea7d9e3c133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ef110ca7009729de1e5453ce2468b687e828f7c13be54d6b207eea7d9e3c133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ef110ca7009729de1e5453ce2468b687e828f7c13be54d6b207eea7d9e3c133", kill_on_drop: false }`
[INFO] [stdout] 9ef110ca7009729de1e5453ce2468b687e828f7c13be54d6b207eea7d9e3c133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+2d5a21f63c98f8a1d5f3c3af93bcb0a8af19af36" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 390794ed36d031783651678957a3a5c4b9c0d1136c19a4bdd3e2f8bbfffb3815
[INFO] running `Command { std: "docker" "start" "-a" "390794ed36d031783651678957a3a5c4b9c0d1136c19a4bdd3e2f8bbfffb3815", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.122
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling clang-sys v1.3.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling z3-sys v0.7.1
[INFO] [stderr]     Checking z3 v0.11.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute `allow`
[INFO] [stdout]    --> src/optimize.rs:253:21
[INFO] [stdout]     |
[INFO] [stdout] 253 |                       #[allow(unused_comparisons)]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 | / impl_weight! {
[INFO] [stdout] 263 | |     u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] note: the built-in attribute `allow` will be ignored, since it's applied to the macro invocation `assert`
[INFO] [stdout]    --> src/optimize.rs:254:21
[INFO] [stdout]     |
[INFO] [stdout] 254 |                       assert!(denom_valid, "Weight denominator cannot be negative");
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 | / impl_weight! {
[INFO] [stdout] 263 | |     u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     = note: this warning originates in the macro `impl_weight` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute `allow`
[INFO] [stdout]    --> src/optimize.rs:253:21
[INFO] [stdout]     |
[INFO] [stdout] 253 |                       #[allow(unused_comparisons)]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 | / impl_weight! {
[INFO] [stdout] 263 | |     u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] note: the built-in attribute `allow` will be ignored, since it's applied to the macro invocation `assert`
[INFO] [stdout]    --> src/optimize.rs:254:21
[INFO] [stdout]     |
[INFO] [stdout] 254 |                       assert!(denom_valid, "Weight denominator cannot be negative");
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 | / impl_weight! {
[INFO] [stdout] 263 | |     u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     = note: this warning originates in the macro `impl_weight` (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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/lib.rs:497:9
[INFO] [stdout]     |
[INFO] [stdout] 497 |     let mut fac = RecFuncDecl::new(&ctx, "fac", &[&Sort::int(&ctx)], &Sort::int(&ctx));
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/lib.rs:541:9
[INFO] [stdout]     |
[INFO] [stdout] 541 |     let mut fac = RecFuncDecl::new(&ctx, "fac", &[&Sort::int(&ctx)], &Sort::int(&ctx));
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.92s
[INFO] running `Command { std: "docker" "inspect" "390794ed36d031783651678957a3a5c4b9c0d1136c19a4bdd3e2f8bbfffb3815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "390794ed36d031783651678957a3a5c4b9c0d1136c19a4bdd3e2f8bbfffb3815", kill_on_drop: false }`
[INFO] [stdout] 390794ed36d031783651678957a3a5c4b9c0d1136c19a4bdd3e2f8bbfffb3815