persistence: More error contexts (#40787)

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Co-authored-by: David Kleingeld <davidsk@zed.dev>

crates/project/src/buffer_store.rs

@@ -24,7 +24,7 @@ use rpc::{
 
 use std::{io, sync::Arc, time::Instant};
 use text::{BufferId, ReplicaId};
-use util::{ResultExt as _, TryFutureExt, debug_panic, maybe, rel_path::RelPath};
+use util::{ResultExt as _, TryFutureExt, debug_panic, maybe, paths::PathStyle, rel_path::RelPath};
 use worktree::{File, PathChange, ProjectEntryId, Worktree, WorktreeId};
 
 /// A set of open buffers.
@@ -621,8 +621,11 @@ impl LocalBufferStore {
             let load_file = worktree.load_file(path.as_ref(), cx);
             let reservation = cx.reserve_entity();
             let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
+            let path = path.clone();
             cx.spawn(async move |_, cx| {
-                let loaded = load_file.await?;
+                let loaded = load_file.await.with_context(|| {
+                    format!("Could not open path: {}", path.display(PathStyle::local()))
+                })?;
                 let text_buffer = cx
                     .background_spawn(async move {
                         text::Buffer::new(ReplicaId::LOCAL, buffer_id, loaded.text)