[INFO] fetching crate z3 0.11.0...
[INFO] checking z3-0.11.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate z3 0.11.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate z3 0.11.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate z3 0.11.0
[INFO] finished tweaking crates.io crate z3 0.11.0
[INFO] tweaked toml for crates.io crate z3 0.11.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7460425dc43713068ad3f37b55d7212842b8cfd217e0d675733bcd10195bb761
[INFO] running `Command { std: "docker" "start" "-a" "7460425dc43713068ad3f37b55d7212842b8cfd217e0d675733bcd10195bb761", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7460425dc43713068ad3f37b55d7212842b8cfd217e0d675733bcd10195bb761", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7460425dc43713068ad3f37b55d7212842b8cfd217e0d675733bcd10195bb761", kill_on_drop: false }`
[INFO] [stdout] 7460425dc43713068ad3f37b55d7212842b8cfd217e0d675733bcd10195bb761
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 468b6d89e5f754e71d6c4197cf344fc74ce55bb54860237d671952696cb2b3c4
[INFO] running `Command { std: "docker" "start" "-a" "468b6d89e5f754e71d6c4197cf344fc74ce55bb54860237d671952696cb2b3c4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling z3-sys v0.6.3
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking z3 v0.11.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/lib.rs:496:9
[INFO] [stdout]     |
[INFO] [stdout] 496 |     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:529:9
[INFO] [stdout]     |
[INFO] [stdout] 529 |     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 6.98s
[INFO] running `Command { std: "docker" "inspect" "468b6d89e5f754e71d6c4197cf344fc74ce55bb54860237d671952696cb2b3c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468b6d89e5f754e71d6c4197cf344fc74ce55bb54860237d671952696cb2b3c4", kill_on_drop: false }`
[INFO] [stdout] 468b6d89e5f754e71d6c4197cf344fc74ce55bb54860237d671952696cb2b3c4