From 628a25ef30f3584a3d3e58a203961c9e24850d66 Mon Sep 17 00:00:00 2001
From: Nicolas Silva <nical@fastmail.com>
Date: Wed, 30 Nov 2022 22:43:55 +0100
Subject: [PATCH] The fix from #3233 on top of the v0.14 branch (#3241)

---
 CHANGELOG.md                | 6 ++++++
 Cargo.lock                  | 8 ++++----
 wgpu-core/Cargo.toml        | 2 +-
 wgpu-core/src/device/mod.rs | 5 ++++-
 wgpu/Cargo.toml             | 4 ++--
 5 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a988545a..a489ba7c6 100644
--- a/CHANGELOG.md
+++ b/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
diff --git a/Cargo.lock b/Cargo.lock
index f0e528aab..326775f36 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2200,7 +2200,7 @@ dependencies = [
 
 [[package]]
 name = "wgpu"
-version = "0.14.0"
+version = "0.14.2"
 dependencies = [
  "arrayvec 0.7.2",
  "async-executor",
@@ -2218,7 +2218,7 @@ dependencies = [
  "nanorand",
  "noise",
  "obj",
- "parking_lot 0.12.1",
+ "parking_lot 0.11.2",
  "png",
  "pollster",
  "raw-window-handle 0.5.0",
@@ -2236,7 +2236,7 @@ dependencies = [
 
 [[package]]
 name = "wgpu-core"
-version = "0.14.0"
+version = "0.14.2"
 dependencies = [
  "arrayvec 0.7.2",
  "bit-vec",
@@ -2246,7 +2246,7 @@ dependencies = [
  "fxhash",
  "log",
  "naga",
- "parking_lot 0.12.1",
+ "parking_lot 0.11.2",
  "profiling",
  "raw-window-handle 0.5.0",
  "ron",
diff --git a/wgpu-core/Cargo.toml b/wgpu-core/Cargo.toml
index 73792f798..d84118053 100644
--- a/wgpu-core/Cargo.toml
+++ b/wgpu-core/Cargo.toml
@@ -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"
diff --git a/wgpu-core/src/device/mod.rs b/wgpu-core/src/device/mod.rs
index a88d99cbc..20e7bf014 100644
--- a/wgpu-core/src/device/mod.rs
+++ b/wgpu-core/src/device/mod.rs
@@ -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)
diff --git a/wgpu/Cargo.toml b/wgpu/Cargo.toml
index 50dc584f1..5e257a7ca 100644
--- a/wgpu/Cargo.toml
+++ b/wgpu/Cargo.toml
@@ -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]