SIGTRAP from max slice size exceeded

[ealui-statsig]

When generating a report from the profile, its possible for max slice size to be hit (exit code 133). This causes the following stack trace:

{
  "v": 0,
  "msg": "panicked at library/core/src/panicking.rs:221:5:\nunsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`",
  "level": 50,
  "pod_name": "MacBook-Pro-7.local",
  "pid": 12868,
  "time": "2024-09-13T19:20:09.75422Z",
  "target": "logging_lib",
  "line": 8,
  "file": "rust_libs/logging-lib/src/lib.rs",
  "error.stack": [
    {
      "0": "backtrace::backtrace::libunwind::trace",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.73/src/backtrace/libunwind.rs:116:5"
    },
    {
      "1": "backtrace::backtrace::trace_unsynchronized",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.73/src/backtrace/mod.rs:66:5"
    },
    {
      "2": "backtrace::backtrace::trace",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.73/src/backtrace/mod.rs:53:14"
    },
    {
      "3": "backtrace::capture::Backtrace::create",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.73/src/capture.rs:197:9"
    },
    {
      "4": "backtrace::capture::Backtrace::new",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.73/src/capture.rs:162:22"
    },
    {
      "5": "logging_lib::panic_hook",
      "location": "/Users/user/Documents/GitHub/statsig/rust_libs/logging-lib/src/lib.rs:11:39"
    },
    {
      "6": "core::ops::function::Fn::call",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/ops/function.rs:79:5"
    },
    {
      "7": "<alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/alloc/src/boxed.rs:2084:9"
    },
    {
      "8": "std::panicking::rust_panic_with_hook",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:808:13"
    },
    {
      "9": "std::panicking::begin_panic_handler::{{closure}}",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:667:13"
    },
    {
      "10": "std::sys::backtrace::__rust_end_short_backtrace",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/sys/backtrace.rs:168:18"
    },
    {
      "11": "rust_begin_unwind",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:665:5"
    },
    {
      "12": "core::panicking::panic_nounwind_fmt::runtime",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:112:18"
    },
    {
      "13": "core::panicking::panic_nounwind_fmt",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:122:5"
    },
    {
      "14": "core::panicking::panic_nounwind",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:221:5"
    },
    {
      "15": "core::slice::raw::from_raw_parts::precondition_check",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/ub_checks.rs:68:21"
    },
    {
      "16": "core::slice::raw::from_raw_parts",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/ub_checks.rs:75:17"
    },
    {
      "17": "<pprof::collector::TempFdArrayIterator<T> as core::iter::traits::iterator::Iterator>::next",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/pprof-0.13.0/src/collector.rs:225:26"
    },
    {
      "18": "core::iter::traits::iterator::Iterator::fold",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/iter/traits/iterator.rs:2587:29"
    },
    {
      "19": "<core::iter::adapters::chain::Chain<A,B> as core::iter::traits::iterator::Iterator>::fold",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/iter/adapters/chain.rs:126:19"
    },
    {
      "20": "core::iter::traits::iterator::Iterator::for_each",
      "location": "/rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/iter/traits/iterator.rs:818:9"
    },
    {
      "21": "pprof::report::ReportBuilder::build",
      "location": "/Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/pprof-0.13.0/src/report.rs:110:17"
    },
    ...
    ...
    ...
    ...
    ...
  ]
}

This is triggered from simply doing something like this:

pub async fn do_profile(profiling_duration_s: u64) -> Result<Report, Error> {
        let guard = pprof::ProfilerGuard::new(1000)?;
        tokio::time::sleep(std::time::Duration::new(profiling_duration_s, 0)).await;
        guard.report().build()
    }

In my test, profiling_duration_s was 10s, but I think its highly dependent on the contents of the profile itself

[YangKeao]

It has also been fixed by #255. It's an alignment issue.