[INFO] fetching crate idx-rs 0.10.0...
[INFO] testing idx-rs-0.10.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0
[INFO] extracting crate idx-rs 0.10.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate idx-rs 0.10.0
[INFO] finished tweaking crates.io crate idx-rs 0.10.0
[INFO] tweaked toml for crates.io crate idx-rs 0.10.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate idx-rs 0.10.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 98 packages to latest compatible versions
[INFO] [stderr]       Adding bzip2 v0.4.4 (available: v0.6.0)
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.6.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded inflate v0.4.5
[INFO] [stderr]   Downloaded databuffer v1.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 867d2f66c9e525edebb1d411b2684ec5bc9774282f0317ac46e0460a6c327874
[INFO] running `Command { std: "docker" "start" "-a" "867d2f66c9e525edebb1d411b2684ec5bc9774282f0317ac46e0460a6c327874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "867d2f66c9e525edebb1d411b2684ec5bc9774282f0317ac46e0460a6c327874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "867d2f66c9e525edebb1d411b2684ec5bc9774282f0317ac46e0460a6c327874", kill_on_drop: false }`
[INFO] [stdout] 867d2f66c9e525edebb1d411b2684ec5bc9774282f0317ac46e0460a6c327874
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 0f3a97b9519c2547f7e06085c44e8bf885df55965a50eb51ce6730196783bba9
[INFO] running `Command { std: "docker" "start" "-a" "0f3a97b9519c2547f7e06085c44e8bf885df55965a50eb51ce6730196783bba9", kill_on_drop: false }`
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling bzip2-sys v0.1.13+1.0.8
[INFO] [stderr]    Compiling crc32fast v1.4.2
[INFO] [stderr]    Compiling databuffer v1.1.4
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling bzip2 v0.4.4
[INFO] [stderr]    Compiling idx-rs v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:180:18
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt {
[INFO] [stdout]     |                  ^^^^^^^^^                 ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt<'_> {
[INFO] [stdout]     |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.61s
[INFO] running `Command { std: "docker" "inspect" "0f3a97b9519c2547f7e06085c44e8bf885df55965a50eb51ce6730196783bba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f3a97b9519c2547f7e06085c44e8bf885df55965a50eb51ce6730196783bba9", kill_on_drop: false }`
[INFO] [stdout] 0f3a97b9519c2547f7e06085c44e8bf885df55965a50eb51ce6730196783bba9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] d7de8f6ea2ed76d3a14a7cbaf60fb22b9276a266a3624750271fb6f5989449f7
[INFO] running `Command { std: "docker" "start" "-a" "d7de8f6ea2ed76d3a14a7cbaf60fb22b9276a266a3624750271fb6f5989449f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:180:18
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt {
[INFO] [stdout]     |                  ^^^^^^^^^                 ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt<'_> {
[INFO] [stdout]     |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling criterion v0.3.6
[INFO] [stderr]    Compiling idx-rs v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: non-binding let on a synchronization lock
[INFO] [stdout]   --> tests/lib.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _ = CACHE.lock();
[INFO] [stdout]    |         ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(let_underscore_lock)]` on by default
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _unused = CACHE.lock();
[INFO] [stdout]    |          ++++++
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]    |
[INFO] [stdout] 14 -     let _ = CACHE.lock();
[INFO] [stdout] 14 +     drop(CACHE.lock());
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `idx-rs` (test "lib") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:180:18
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt {
[INFO] [stdout]     |                  ^^^^^^^^^                 ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn index(&mut self, idx: usize) -> IdxFileOpt<'_> {
[INFO] [stdout]     |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d7de8f6ea2ed76d3a14a7cbaf60fb22b9276a266a3624750271fb6f5989449f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7de8f6ea2ed76d3a14a7cbaf60fb22b9276a266a3624750271fb6f5989449f7", kill_on_drop: false }`
[INFO] [stdout] d7de8f6ea2ed76d3a14a7cbaf60fb22b9276a266a3624750271fb6f5989449f7