diff --git a/wgpu-core/src/command/transfer.rs b/wgpu-core/src/command/transfer.rs
index 289a4134f..0f5fcb8a9 100644
--- a/wgpu-core/src/command/transfer.rs
+++ b/wgpu-core/src/command/transfer.rs
@@ -414,6 +414,12 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
         )?;
 
         let (block_width, _) = conv::texture_block_size(dst_texture.format);
+        if !conv::is_valid_copy_dst_texture_format(dst_texture.format) {
+            panic!(
+                "copying to textures with format {:?} is forbidden",
+                dst_texture.format
+            );
+        }
 
         let buffer_width = (source.layout.bytes_per_row / bytes_per_block) * block_width;
         let region = hal::command::BufferImageCopy {
@@ -521,6 +527,12 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
         )?;
 
         let (block_width, _) = conv::texture_block_size(src_texture.format);
+        if !conv::is_valid_copy_src_texture_format(src_texture.format) {
+            panic!(
+                "copying from textures with format {:?} is forbidden",
+                src_texture.format
+            );
+        }
 
         let buffer_width = (destination.layout.bytes_per_row / bytes_per_block) * block_width;
         let region = hal::command::BufferImageCopy {
diff --git a/wgpu-core/src/conv.rs b/wgpu-core/src/conv.rs
index d8cff595e..b75f823a3 100644
--- a/wgpu-core/src/conv.rs
+++ b/wgpu-core/src/conv.rs
@@ -439,11 +439,10 @@ pub fn texture_block_size(format: wgt::TextureFormat) -> (u32, u32) {
         | Tf::Rgba16Float
         | Tf::Rgba32Uint
         | Tf::Rgba32Sint
-        | Tf::Rgba32Float => (1, 1),
-
-        Tf::Depth32Float | Tf::Depth24Plus | Tf::Depth24PlusStencil8 => {
-            unreachable!("unexpected depth format")
-        }
+        | Tf::Rgba32Float
+        | Tf::Depth32Float
+        | Tf::Depth24Plus
+        | Tf::Depth24PlusStencil8 => (1, 1),
 
         Tf::Bc1RgbaUnorm
         | Tf::Bc1RgbaUnormSrgb
@@ -562,6 +561,22 @@ pub fn is_power_of_two(val: u32) -> bool {
     val != 0 && (val & (val - 1)) == 0
 }
 
+pub fn is_valid_copy_src_texture_format(format: wgt::TextureFormat) -> bool {
+    use wgt::TextureFormat as Tf;
+    match format {
+        Tf::Depth24Plus | Tf::Depth24PlusStencil8 => false,
+        _ => true,
+    }
+}
+
+pub fn is_valid_copy_dst_texture_format(format: wgt::TextureFormat) -> bool {
+    use wgt::TextureFormat as Tf;
+    match format {
+        Tf::Depth32Float | Tf::Depth24Plus | Tf::Depth24PlusStencil8 => false,
+        _ => true,
+    }
+}
+
 pub fn map_texture_dimension_size(
     dimension: wgt::TextureDimension,
     wgt::Extent3d {
diff --git a/wgpu-core/src/device/queue.rs b/wgpu-core/src/device/queue.rs
index d4416822a..20fd27c58 100644
--- a/wgpu-core/src/device/queue.rs
+++ b/wgpu-core/src/device/queue.rs
@@ -307,6 +307,12 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
             size,
         )?;
         let (block_width, block_height) = conv::texture_block_size(texture_format);
+        if !conv::is_valid_copy_dst_texture_format(texture_format) {
+            panic!(
+                "copying to textures with format {:?} is forbidden",
+                texture_format
+            );
+        }
         let width_blocks = size.width / block_width;
         let height_blocks = size.height / block_width;