Fix running rerun with --all-features (rerun-io#262)

* Remove --all-features from README.md

* Fix running rerun with --all-features

README.md

@@ -24,7 +24,7 @@ rustup set default-host aarch64-apple-darwin && rustup install 1.65
 After running the setup above, you can build and install the Rerun Viewer with:
 
 ```sh
-cargo install --path ./crates/rerun/ --all-features
+cargo install --path ./crates/rerun/
 ```
 
 You should now be able to run `rerun --help` in any terminal.

crates/re_viewer/src/app.rs

@@ -297,8 +297,7 @@ impl eframe::App for App {
         self.toasts.show(egui_ctx);
 
         #[cfg(feature = "wgpu")]
-        {
-            let render_state = frame.wgpu_render_state().unwrap();
+        if let Some(render_state) = frame.wgpu_render_state() {
             let paint_callback_resources =
                 &mut render_state.renderer.write().paint_callback_resources;
             paint_callback_resources

crates/re_viewer/src/lib.rs

@@ -98,10 +98,9 @@ pub(crate) fn wgpu_options() -> egui_wgpu::WgpuConfiguration {
 
 pub(crate) fn customize_eframe(cc: &eframe::CreationContext<'_>) -> crate::DesignTokens {
     #[cfg(feature = "wgpu")]
-    {
+    if let Some(render_state) = &cc.wgpu_render_state {
         use re_renderer::{config::RenderContextConfig, RenderContext};
 
-        let render_state = cc.wgpu_render_state.as_ref().unwrap();
         let paint_callback_resources = &mut render_state.renderer.write().paint_callback_resources;
 
         // TODO(andreas): Query used surface format from eframe/renderer.