write_image Kaleido failed to generate static image

[neo-escieur]

On Windows:
with this in Cargo.toml:

[dependencies]
plotly = { version = "0.12.1", features = ["kaleido", "kaleido_download"] }
rand = "0.8.5"
rand_distr = "0.4.3"

and this code :

use plotly::{
    color::{NamedColor},
    common::{ Marker },
    layout::{Layout, BarMode},
    Histogram, Plot, ImageFormat
};
use rand_distr::{Distribution, Normal};
fn sample_normal_distribution(n: usize, mean: f64, std_dev: f64) -> Vec<f64> {
    let mut rng = rand::thread_rng();
    let dist = Normal::new(mean, std_dev).unwrap();
    let mut v = Vec::<f64>::with_capacity(n);
    for _idx in 1..n {
        v.push(dist.sample(&mut rng));
    }
    v
}

fn main() {
    let samples1 = sample_normal_distribution(500, 0.0, 1.0);
    let trace1 = Histogram::new(samples1)
        .name("trace 1")
        .opacity(0.5)
        .marker(Marker::new().color(NamedColor::Green));

    let samples2 = sample_normal_distribution(500, 0.0, 1.0);
    let trace2 = Histogram::new(samples2)
        .name("trace 2")
        .opacity(0.6)
        .marker(Marker::new().color(NamedColor::Red));

    let mut plot = Plot::new();
    plot.add_trace(trace1);
    plot.add_trace(trace2);

    let layout = Layout::new().bar_mode(BarMode::Stack);
    plot.set_layout(layout);
    plot.write_html("out.html");
    plot.write_image("testx", ImageFormat::PNG, 800, 600, 1.0);
}

the file out.html is ok but testx.png is created but empty.

this is the error:

Kaleido failed to generate static image for format: png.
Kaleido stderr output:
[0108/174710.543:WARNING:resource_bundle.cc(405)] locale_file_path.empty() for locale
[0108/174710.605:WARNING:headless_browser_main_parts.cc(83)] Cannot create Pref Service with no user data dir.

is there a way to make this working on windows ?

[andrei-ng]

Could you try to remove the locally downloaded and installed version of Kaleido and try to build the crate and your example again.

Kaleido is a tough cookie . I will try to reproduce and debug in the CI (don't own a Windows machine)

[neo-escieur]

Same issue after deleting the locally downloaded and installed version of Kaleido and rebuilding.

[neo-escieur]

more info:

thread 'main' panicked at C:\Users\xxxx\.cargo\registry\src\index.crates.io-6f17d22bba15001f\plotly_kaleido-0.12.1\src/lib.rs:40:38:
called `Result::unwrap()` on an `Err` value: Error("EOF while parsing a value", line: 1, column: 0)
stack backtrace:
   0:     0x7ff6719490b1 - std::backtrace_rs::backtrace::dbghelp64::trace
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\..\..\backtrace\src\backtrace\dbghelp64.rs:91
   1:     0x7ff6719490b1 - std::backtrace_rs::backtrace::trace_unsynchronized
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2:     0x7ff6719490b1 - std::sys::backtrace::_print_fmt
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\sys\backtrace.rs:66
   3:     0x7ff6719490b1 - std::sys::backtrace::impl$0::print::impl$0::fmt
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\sys\backtrace.rs:39
   4:     0x7ff67196544a - core::fmt::rt::Argument::fmt
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/core\src\fmt\rt.rs:177
   5:     0x7ff67196544a - core::fmt::write
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/core\src\fmt\mod.rs:1186
   6:     0x7ff671945c27 - std::io::Write::write_fmt<std::sys::pal::windows::stdio::Stderr>
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\io\mod.rs:1839
   7:     0x7ff671948ef5 - std::sys::backtrace::BacktraceLock::print
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\sys\backtrace.rs:42
   8:     0x7ff67194ad67 - std::panicking::default_hook::closure$1
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:268
   9:     0x7ff67194ab47 - std::panicking::default_hook
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:295
  10:     0x7ff67194b3f3 - std::panicking::rust_panic_with_hook
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:801
  11:     0x7ff67194b279 - std::panicking::begin_panic_handler::closure$0
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:674
  12:     0x7ff671949b6f - std::sys::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0,never$>
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\sys\backtrace.rs:170
  13:     0x7ff67194ae7e - std::panicking::begin_panic_handler
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:665
  14:     0x7ff67196c7b1 - core::panicking::panic_fmt
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/core\src\panicking.rs:74
  15:     0x7ff67196cbe0 - core::result::unwrap_failed
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/core\src\result.rs:1700
  16:     0x7ff6718cb4a2 - enum2$<core::result::Result<plotly_kaleido::KaleidoResult,serde_json::error::Error> >::unwrap
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\result.rs:1104
  17:     0x7ff6718cb4a2 - plotly_kaleido::KaleidoResult::from
                               at C:\Users\xxxx\.cargo\registry\src\index.crates.io-6f17d22bba15001f\plotly_kaleido-0.12.1\src\lib.rs:40
  18:     0x7ff6718ccd69 - plotly_kaleido::Kaleido::convert
                               at C:\Users\xxxx\.cargo\registry\src\index.crates.io-6f17d22bba15001f\plotly_kaleido-0.12.1\src\lib.rs:229
  19:     0x7ff6718cbe86 - plotly_kaleido::Kaleido::save
                               at C:\Users\xxxx\.cargo\registry\src\index.crates.io-6f17d22bba15001f\plotly_kaleido-0.12.1\src\lib.rs:147
  20:     0x7ff67178456c - plotly::plot::Plot::write_image<ref$<str$> >
                               at C:\Users\xxxx\.cargo\registry\src\index.crates.io-6f17d22bba15001f\plotly-0.12.1\src\plot.rs:408
  21:     0x7ff6717bd5ea - tst1::main
                               at C:\Users\xxxx\Documents\tst1\src\main.rs:38
  22:     0x7ff67178328b - core::ops::function::FnOnce::call_once<void (*)(),tuple$<> >
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ops\function.rs:250
  23:     0x7ff6717b9f0e - core::hint::black_box
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\hint.rs:389
  24:     0x7ff6717b9f0e - std::sys::backtrace::__rust_begin_short_backtrace<void (*)(),tuple$<> >
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\sys\backtrace.rs:154
  25:     0x7ff6717b9c91 - std::rt::lang_start::closure$0<tuple$<> >
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\rt.rs:195
  26:     0x7ff67194310c - std::rt::lang_start_internal::closure$1
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\rt.rs:174
  27:     0x7ff67194310c - std::panicking::try::do_call
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:557
  28:     0x7ff67194310c - std::panicking::try
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panicking.rs:520
  29:     0x7ff67194310c - std::panic::catch_unwind
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\panic.rs:358
  30:     0x7ff67194310c - std::rt::lang_start_internal
                               at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf\library/std\src\rt.rs:174
  31:     0x7ff6717b9c6a - std::rt::lang_start<tuple$<> >
                               at C:\Users\xxxx\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\rt.rs:194
  32:     0x7ff6717bd909 - main

[andrei-ng]

Thanks for the backtrace, I will let you know if I figure out a solution.