The fix from #3233 on top of the v0.14 branch (#3241)

Author: nical

CHANGELOG.md

@@ -40,6 +40,12 @@ Bottom level categories:
 
 ## Unreleased
 
+## wgpu-0.14.2 (2022-11-28)
+
+### Bug Fixes
+
+- Fix incorrect offset in `get_mapped_range` by @nical in [#3233](https://github.com/gfx-rs/wgpu/pull/3233)
+
 ## wgpu-0.14.1 (2022-11-02)
 
 ### Bug Fixes

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "wgpu-core"
-version = "0.14.0"
+version = "0.14.2"
 authors = ["wgpu developers"]
 edition = "2021"
 description = "WebGPU core logic on wgpu-hal"

wgpu-core/Cargo.toml

@@ -5654,7 +5654,10 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
                         max: range.end,
                     });
                 }
-                unsafe { Ok((ptr.as_ptr().offset(offset as isize), range_size)) }
+                // ptr points to the beginning of the range we mapped in map_async
+                // rather thant the beginning of the buffer.
+                let relative_offset = (offset - range.start) as isize;
+                unsafe { Ok((ptr.as_ptr().offset(relative_offset), range_size)) }
             }
             resource::BufferMapState::Idle | resource::BufferMapState::Waiting(_) => {
                 Err(BufferAccessError::NotMapped)

wgpu-core/src/device/mod.rs

@@ -1,6 +1,6 @@
 [package]
 name = "wgpu"
-version = "0.14.0"
+version = "0.14.2"
 authors = ["wgpu developers"]
 edition = "2021"
 description = "Rusty WebGPU API wrapper"
@@ -89,7 +89,7 @@ vulkan-portability = ["wgc/vulkan-portability"]
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.wgc]
 package = "wgpu-core"
 path = "../wgpu-core"
-version = "0.14"
+version = "0.14.2"
 features = ["raw-window-handle"]
 
 [target.'cfg(target_arch = "wasm32")'.dependencies.wgc]