michaelfairley · July 4, 2021 22:40
diff --git a/Cargo.lock b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
 [package]
 name = "zero_byte_copy_crash"
 version = "0.1.0"
 authors = ["Michael Fairley <[email protected]>"]
 edition = "2018"

 [dependencies]
 wgpu = {git = "https://github.com/gfx-rs/wgpu-rs"}
diff --git a/crash_report b/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
diff --git a/main.rs b/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()]);
 }
	[package]
	name = "zero_byte_copy_crash"
	version = "0.1.0"
	authors = ["Michael Fairley <[email protected]>"]
	edition = "2018"

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