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Cargo.toml

[package]
name = "zero_byte_copy_crash"
version = "0.1.0"
authors = ["Michael Fairley <michaelfairley@gmail.com>"]
edition = "2018"

[dependencies]
wgpu = {git = "https://github.com/gfx-rs/wgpu-rs"}

crash_report

Exception Type:        EXC_ARITHMETIC (SIGFPE)
Exception Codes:       EXC_I386_DIV (divide by zero)
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Floating point exception: 8
Termination Reason:    Namespace SIGNAL, Code 0x8
Terminating Process:   exc handler [12258]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.driver.AppleIntelBDWGraphicsMTLDriver	0x00007fff2975e2b9 IGAccelBlitCommandEncoder::copyBufferToBufferInternal(MTLIOAccelResource*, unsigned long long, unsigned int, MTLIOAccelResource*, unsigned long long, unsigned int, unsigned int) + 237
1   com.apple.driver.AppleIntelBDWGraphicsMTLDriver	0x00007fff29762faf IGAccelBlitCommandEncoder::copyBufferToBuffer(MTLIGAccelBuffer*, unsigned int, MTLIGAccelBuffer*, unsigned int, unsigned int) + 69
2   com.apple.driver.AppleIntelBDWGraphicsMTLDriver	0x00007fff29744e30 -[MTLIGAccelBlitCommandEncoder copyFromBuffer:sourceOffset:toBuffer:destinationOffset:size:] + 247
3   zero_byte_copy_crash          	0x00000001031b7e9d _$LT$$LP$A$C$$u20$B$C$$u20$C$C$$u20$D$C$$u20$E$RP$$u20$as$u20$objc..message..MessageArguments$GT$::invoke::h147a82685548f54d + 189 (mod.rs:128)
4   zero_byte_copy_crash          	0x00000001031a28dd objc::message::platform::send_unverified::h6a8f013f11b334d2 + 173 (mod.rs:27)
5   zero_byte_copy_crash          	0x00000001031ad200 metal::encoder::BlitCommandEncoderRef::copy_from_buffer::h5bcbc19fae2ba101 + 464 (encoder.rs:667)
6   zero_byte_copy_crash          	0x0000000103109c7d gfx_backend_metal::command::exec_blit::ha582046144434e49 + 509 (command.rs:1762)
7   zero_byte_copy_crash          	0x000000010304199d gfx_backend_metal::command::CommandSink::blit_commands::h8c2edb063650d24e + 1629 (command.rs:1242)
8   zero_byte_copy_crash          	0x0000000103040a47 _$LT$gfx_backend_metal..command..CommandBuffer$u20$as$u20$gfx_hal..command..CommandBuffer$LT$gfx_backend_metal..Backend$GT$$GT$::copy_buffer::h476fcb19746687e6 + 5255 (command.rs:4060)
9   zero_byte_copy_crash          	0x000000010303bfd4 wgpu_native::command::transfer::command_encoder_copy_buffer_to_buffer::h02af9153a4761553 + 1572 (transfer.rs:123)
10  zero_byte_copy_crash          	0x000000010303c357 wgpu_command_encoder_copy_buffer_to_buffer + 103 (transfer.rs:142)
11  zero_byte_copy_crash          	0x0000000102f80bc6 wgpu::CommandEncoder::copy_buffer_to_buffer::hb75e21c19db01f09 + 70 (lib.rs:1100)
12  zero_byte_copy_crash          	0x0000000102f7f66c zero_byte_copy_crash::main::h9283ee95fd6926b7 + 540 (main.rs:25)
13  zero_byte_copy_crash          	0x0000000102f7f8b2 std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::hdb3aaa62c6f24554 + 18 (rt.rs:64)
14  zero_byte_copy_crash          	0x00000001031e77c8 std::panicking::try::do_call::h8ffcb2a43dbb732c + 24 (panicking.rs:296)
15  zero_byte_copy_crash          	0x00000001031e939f __rust_maybe_catch_panic + 31 (lib.rs:88)
16  zero_byte_copy_crash          	0x00000001031e813e std::rt::lang_start_internal::ha688fd553625ef6f + 542 (rt.rs:48)
17  zero_byte_copy_crash          	0x0000000102f7f892 std::rt::lang_start::h9b42b3a020b8e7c1 + 66 (rt.rs:64)
18  zero_byte_copy_crash          	0x0000000102f7f742 main + 34
19  libdyld.dylib                 	0x00007fff6968b405 start + 1

main.rs

fn main() {
    let adapter = wgpu::Adapter::request(&wgpu::RequestAdapterOptions {
        power_preference: wgpu::PowerPreference::Default,
        backends: wgpu::BackendBit::PRIMARY,
    }).unwrap();

    let (device, mut queue) = adapter.request_device(&wgpu::DeviceDescriptor {
        extensions: wgpu::Extensions {
            anisotropic_filtering: false,
        },
        limits: wgpu::Limits::default(),
    });

    let data: &[f32] = &[12.0];

    let dst_buf = device
        .create_buffer_mapped(data.len(), wgpu::BufferUsage::COPY_DST)
        .fill_from_slice(data);

    let src_buf = device
        .create_buffer_mapped(data.len(), wgpu::BufferUsage::COPY_SRC)
        .fill_from_slice(data);

    let mut encoder = device.create_command_encoder(&wgpu::CommandEncoderDescriptor { todo: 0 });
    encoder.copy_buffer_to_buffer(&src_buf, 0, &dst_buf, 0, 0 /* works if not 0 */);
    queue.submit(&[encoder.finish()]);
}