std.Io.Threaded: fix compilation errors on posix

2 files changed, 12 insertions, 7 deletions

diff --git a/lib/std/Io/Dir.zig b/lib/std/Io/Dir.zig
index 970cddc82e..0bdaf369c1 100644
--- a/lib/std/Io/Dir.zig
+++ b/lib/std/Io/Dir.zig
@@ -101,10 +101,8 @@ pub const Reader = struct {
     /// Fill position of `buffer`.
     end: usize,
 
-    pub const min_buffer_len = switch (native_os) {
-        .windows => std.mem.alignForward(usize, max_name_bytes, @alignOf(usize)),
-        else => 32, // TODO: what is this based on?
-    };
+    /// A length for `buffer` that allows all implementations to function.
+    pub const min_buffer_len = std.mem.alignForward(usize, max_name_bytes, @alignOf(usize));
 
     pub const State = enum {
         /// Indicates the next call to `read` should rewind and start over the
@@ -120,6 +118,7 @@ pub const Reader = struct {
         SystemResources,
     } || Io.UnexpectedError || Io.Cancelable;
 
+    /// Asserts that `buffer` has length at least `min_buffer_len`.
     pub fn init(dir: Dir, buffer: []align(@alignOf(usize)) u8) Reader {
         assert(buffer.len >= min_buffer_len);
         return .{
@@ -164,7 +163,13 @@ pub const Reader = struct {
 /// see `Walker`.
 pub const Iterator = struct {
     reader: Reader,
-    reader_buffer: [2048]u8 align(@alignOf(usize)),
+    reader_buffer: [reader_buffer_len]u8 align(@alignOf(usize)),
+
+    pub const reader_buffer_len = 2048;
+
+    comptime {
+        assert(reader_buffer_len >= Reader.min_buffer_len);
+    }
 
     pub const Error = Reader.Error;
 
diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index fc66345785..10f6c2d507 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -1621,7 +1621,7 @@ fn dirMakePath(
                 // stat the file and return an error if it's not a directory
                 // this is important because otherwise a dangling symlink
                 // could cause an infinite loop
-                const fstat = dirStatFile(t, dir, component.path, .{});
+                const fstat = try dirStatFile(t, dir, component.path, .{});
                 if (fstat.kind != .directory) return error.NotDir;
             },
             error.FileNotFound => |e| {
@@ -3796,7 +3796,7 @@ fn dirReadWindows(userdata: ?*anyopaque, dr: *Dir.Reader, buffer: []Dir.Entry) D
         // the remaining unprocessed entries, then backtrack and return what we have so far.
         if (name_index + std.unicode.calcWtf8Len(name_wtf16le) > unreserved_start + dr.index) {
             // We should always be able to fit at least one entry into the buffer no matter what
-            std.debug.assert(buffer_index != 0);
+            assert(buffer_index != 0);
             dr.index = backtrack_index;
             break;
         }