gfx-rs/wgpu-native

Identifier refers to disabled backend feature "empty"

davnotdev opened this issue · 2 comments

davnotdev commented

Hi. While trying to call wgpuBufferUnmap, the function panics with "Identifier refers to disabled backend feature 'empty'" using the binaries in the latest Github release. Investigating the error, I find that the error is triggered in the wgpu-core:

define_backend_caller! { gfx_if_empty, gfx_if_empty_hidden, "empty" if all(
    not(any(feature = "metal", feature = "vulkan", feature = "gles")),
    any(target_os = "macos", target_os = "ios"),
) }

This should now happen however because I am not an the empty backend. Using wgpuGenerateReport, I can confirm that I am running using the vulkan backend. Same result when I use the opengl backend. I tried building this repo from the trunk branch. The same libwgpu_native.a that can run the triangle example fails with the same issue. For additional context, I am running Linux on X11.

rajveermalviya commented

I can't repro this with the capture example which uses wgpuBufferUnmap, does that fail for you?
make run-example-capture

davnotdev commented

I found the issue. Should have gotten more sleep because it was a classic case of casting a pointer to the wrong type :-) wgpuBufferUnmap works perfectly once fixed. Thanks for your help.

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