[INFO] cloning repository https://github.com/sch00lb0y/rust-bpf-fork
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sch00lb0y/rust-bpf-fork" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsch00lb0y%2Frust-bpf-fork", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsch00lb0y%2Frust-bpf-fork'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ccaae5cde90bd459d2d3d490a84cc172b64e77e6
[INFO] checking sch00lb0y/rust-bpf-fork against master#cfbc6d4cf1acbac5c025acf8ed68929caa551df3 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsch00lb0y%2Frust-bpf-fork" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sch00lb0y/rust-bpf-fork on toolchain cfbc6d4cf1acbac5c025acf8ed68929caa551df3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sch00lb0y/rust-bpf-fork
[INFO] finished tweaking git repo https://github.com/sch00lb0y/rust-bpf-fork
[INFO] tweaked toml for git repo https://github.com/sch00lb0y/rust-bpf-fork written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/sch00lb0y/rust-bpf-fork already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bcc-sys v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f92983703090420acc82faa094d6c3911349c3c963c34b9a17baf40bd920479a
[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" "f92983703090420acc82faa094d6c3911349c3c963c34b9a17baf40bd920479a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f92983703090420acc82faa094d6c3911349c3c963c34b9a17baf40bd920479a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f92983703090420acc82faa094d6c3911349c3c963c34b9a17baf40bd920479a", kill_on_drop: false }`
[INFO] [stdout] f92983703090420acc82faa094d6c3911349c3c963c34b9a17baf40bd920479a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 57760ed35a6c1a0e567ee4ab5dde72119865f606ed8ebd9d63ae96a2c35501df
[INFO] running `Command { std: "docker" "start" "-a" "57760ed35a6c1a0e567ee4ab5dde72119865f606ed8ebd9d63ae96a2c35501df", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling clang-sys v0.23.0
[INFO] [stderr]    Compiling atty v0.2.6
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling which v1.0.3
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]     Checking backtrace-sys v0.1.16
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling clap v2.29.2
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]    Compiling bindgen v0.37.4
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling cexpr v0.2.2
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]    Compiling env_logger v0.5.12
[INFO] [stderr]    Compiling bcc-sys v0.7.0
[INFO] [stderr]     Checking bcc v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `types::MutPointer`
[INFO] [stdout]  --> src/core/uprobe.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use types::MutPointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]   --> src/core/uprobe.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::ptr;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     raw_cb: Box<FnMut(&[u8]) + Send>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |     cb: Box<Fn() -> Box<FnMut(&[u8]) + Send>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> Box<FnMut(&[u8]) + Send>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |     cb: Box<Fn() -> Box<FnMut(&[u8]) + Send>>,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/perf.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |     raw_cb: Box<FnMut(&[u8]) + Send>,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `types::MutPointer`
[INFO] [stdout]  --> src/core/uprobe.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use types::MutPointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]   --> src/core/uprobe.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::ptr;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     raw_cb: Box<FnMut(&[u8]) + Send>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |     cb: Box<Fn() -> Box<FnMut(&[u8]) + Send>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> Box<FnMut(&[u8]) + Send>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/perf.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |     cb: Box<Fn() -> Box<FnMut(&[u8]) + Send>>,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/perf.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |     raw_cb: Box<FnMut(&[u8]) + Send>,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stdout]   --> src/cpuonline.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | /     lazy_static! {
[INFO] [stdout] 50 | |         static ref TEST: Vec<TestData<'static>> = vec![
[INFO] [stdout] 51 | |                 TestData {
[INFO] [stdout] 52 | |                       data: "",
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |         ];
[INFO] [stdout] 97 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/core/mod.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]   --> src/core/mod.rs:40:19
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]   --> src/core/mod.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]    --> src/core/mod.rs:111:14
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]    --> src/core/mod.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]    --> src/core/mod.rs:111:24
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]   --> src/core/uprobe.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (cpu, group_fd) = (0, -1);
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]   --> src/core/uprobe.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (cpu, group_fd) = (0, -1);
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/core/mod.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]   --> src/core/mod.rs:40:19
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]   --> src/core/mod.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]    --> src/core/mod.rs:111:14
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]    --> src/core/mod.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]    --> src/core/mod.rs:111:24
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let (pid, cpu, group_fd) = (-1, 0, -1);
[INFO] [stdout]     |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cpu`
[INFO] [stdout]   --> src/core/uprobe.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (cpu, group_fd) = (0, -1);
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `group_fd`
[INFO] [stdout]   --> src/core/uprobe.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (cpu, group_fd) = (0, -1);
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_group_fd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `table`
[INFO] [stdout]   --> src/perf.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     table: Table,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `callbacks`
[INFO] [stdout]   --> src/perf.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     callbacks: Vec<Box<PerfCallback>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `table`
[INFO] [stdout]   --> src/perf.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     table: Table,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `callbacks`
[INFO] [stdout]   --> src/perf.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     callbacks: Vec<Box<PerfCallback>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/opensnoop.rs:55:32
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn perf_data_callback() -> Box<FnMut(&[u8]) + Send> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&[u8]) + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/opensnoop.rs:46:45
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut perf_map = init_perf_map(table, perf_data_callback)?;
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             expected struct `std::boxed::Box`, found fn item
[INFO] [stdout]    |                                             help: store this in the heap by calling `Box::new`: `Box::new(perf_data_callback)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::boxed::Box<(dyn std::ops::Fn() -> std::boxed::Box<(dyn for<'r> std::ops::FnMut(&'r [u8]) + std::marker::Send + 'static)> + 'static)>`
[INFO] [stdout]              found fn item `fn() -> std::boxed::Box<(dyn for<'r> std::ops::FnMut(&'r [u8]) + std::marker::Send + 'static)> {perf_data_callback}`
[INFO] [stdout]    = note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bcc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "57760ed35a6c1a0e567ee4ab5dde72119865f606ed8ebd9d63ae96a2c35501df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57760ed35a6c1a0e567ee4ab5dde72119865f606ed8ebd9d63ae96a2c35501df", kill_on_drop: false }`
[INFO] [stdout] 57760ed35a6c1a0e567ee4ab5dde72119865f606ed8ebd9d63ae96a2c35501df
