stage2 macho: workaround stage2 bugs

src/Sema.zig

@@ -12417,7 +12417,8 @@ fn zirPtrType(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air
     const tracy = trace(@src());
     defer tracy.end();
 
-    const src: LazySrcLoc = .unneeded;
+    // TODO better source location
+    const src: LazySrcLoc = sema.src;
     const elem_ty_src: LazySrcLoc = .unneeded;
     const inst_data = sema.code.instructions.items(.data)[inst].ptr_type;
     const extra = sema.code.extraData(Zir.Inst.PtrType, inst_data.payload_index);

src/link/MachO.zig

@@ -1317,6 +1317,9 @@ pub fn parseDylib(self: *MachO, path: []const u8, opts: DylibCreateOpts) ParseDy
         error.EndOfStream, error.NotDylib => {
             try file.seekTo(0);
 
+            // TODO https://github.com/ziglang/zig/issues/11367
+            if (@import("builtin").zig_backend != .stage1) return error.Unexpected;
+
             var lib_stub = LibStub.loadFromFile(self.base.allocator, file) catch {
                 dylib.deinit(self.base.allocator);
                 return false;
@@ -5747,7 +5750,6 @@ fn populateLazyBindOffsetsInStubHelper(self: *MachO, buffer: []const u8) !void {
     while (true) {
         const inst = reader.readByte() catch |err| switch (err) {
             error.EndOfStream => break,
-            else => return err,
         };
         const opcode: u8 = inst & macho.BIND_OPCODE_MASK;
 
@@ -5875,7 +5877,7 @@ fn writeFunctionStarts(self: *MachO) !void {
     mem.set(u8, buffer, 0);
 
     var stream = std.io.fixedBufferStream(buffer);
-    var writer = stream.writer();
+    const writer = stream.writer();
 
     for (offsets.items) |offset| {
         try std.leb.writeULEB128(writer, offset);
@@ -6236,7 +6238,8 @@ fn writeLoadCommands(self: *MachO) !void {
 
     var buffer = try self.base.allocator.alloc(u8, sizeofcmds);
     defer self.base.allocator.free(buffer);
-    var writer = std.io.fixedBufferStream(buffer).writer();
+    var fib = std.io.fixedBufferStream(buffer);
+    const writer = fib.writer();
     for (self.load_commands.items) |lc| {
         try lc.write(writer);
     }
@@ -6416,7 +6419,7 @@ fn snapshotState(self: *MachO) !void {
         error.Unseekable => try out_file.writer().writeByte('['),
         else => |e| return e,
     }
-    var writer = out_file.writer();
+    const writer = out_file.writer();
 
     var snapshot = Snapshot{
         .timestamp = std.time.nanoTimestamp(),

src/link/MachO/Archive.zig

@@ -171,7 +171,6 @@ fn parseTableOfContents(self: *Archive, allocator: Allocator, reader: anytype) !
     while (true) {
         const n_strx = symtab_reader.readIntLittle(u32) catch |err| switch (err) {
             error.EndOfStream => break,
-            else => |e| return e,
         };
         const object_offset = try symtab_reader.readIntLittle(u32);
 

src/link/MachO/DebugSymbols.zig

@@ -472,7 +472,8 @@ fn writeLoadCommands(self: *DebugSymbols, allocator: Allocator) !void {
 
     var buffer = try allocator.alloc(u8, sizeofcmds);
     defer allocator.free(buffer);
-    var writer = std.io.fixedBufferStream(buffer).writer();
+    var fib = std.io.fixedBufferStream(buffer);
+    const writer = fib.writer();
     for (self.load_commands.items) |lc| {
         try lc.write(writer);
     }

src/link/MachO/Dylib.zig

@@ -64,7 +64,7 @@ pub const Id = struct {
         };
     }
 
-    pub fn deinit(id: *Id, allocator: Allocator) void {
+    pub fn deinit(id: Id, allocator: Allocator) void {
         allocator.free(id.name);
     }
 

src/link/MachO/Object.zig

@@ -492,7 +492,8 @@ pub fn parseIntoAtoms(self: *Object, allocator: Allocator, macho_file: *MachO) !
             mem.copy(u8, atom.code.items, code);
         }
 
-        try atom.parseRelocs(relocs, .{
+        // TODO stage2 bug: @alignCast shouldn't be needed
+        try atom.parseRelocs(@alignCast(@alignOf(macho.relocation_info), relocs), .{
             .base_addr = sect.addr,
             .allocator = allocator,
             .object = self,