forgot to commit and push test fixes

Author: iximeow

crates/test-programs/tests/wasm_tests/runtime.rs

@@ -31,12 +31,12 @@ pub fn instantiate(
             PreopenType::OS => {
                 let preopen_dir = wasi_common::preopen_dir(workspace)
                     .context(format!("error while preopening {:?}", workspace))?;
-                builder = builder.preopened_dir(preopen_dir, ".");
+                builder.preopened_dir(preopen_dir, ".");
             }
             PreopenType::Virtual => {
                 // we can ignore the workspace path for virtual preopens because virtual preopens
                 // don't exist in the filesystem anyway - no name conflict concerns.
-                builder = builder.preopened_virt(VirtualDirEntry::empty_directory(), ".");
+                builder.preopened_virt(VirtualDirEntry::empty_directory(), ".");
             }
         }
     }

crates/wasi-common/src/ctx.rs

@@ -232,7 +232,11 @@ impl WasiCtxBuilder {
     }
 
     /// Add a preopened virtual directory.
-    pub fn preopened_virt<P: AsRef<Path>>(mut self, dir: VirtualDirEntry, guest_path: P) -> Self {
+    pub fn preopened_virt<P: AsRef<Path>>(
+        &mut self,
+        dir: VirtualDirEntry,
+        guest_path: P,
+    ) -> &mut Self {
         fn populate_directory(virtentry: HashMap<String, VirtualDirEntry>, dir: &mut VirtualDir) {
             for (path, entry) in virtentry.into_iter() {
                 match entry {