no align available for type '.cimport:1:15.struct_google_protobuf_Timestamp'

[calvin2021y]

Zig Version

0.10.0-dev.2880+6f0807f50

Steps to Reproduce

when import this header

#define UPB_PTR_AT(msg, ofs, type) ((type*)((char*)(msg) + (ofs)))

typedef struct google_protobuf_Timestamp google_protobuf_Timestamp;

UPB_INLINE void ptest_Message_NestedMessage_set_v(test_Message *msg, struct google_protobuf_Timestamp* value) {
  _upb_sethas(msg, 1);
  *UPB_PTR_AT(msg, UPB_SIZE(4, 8), struct google_protobuf_Timestamp*) = value;
}

Expected Behavior

the struct google_protobuf_Timestamp only used as pointer from c header file, no align is inused here.

Actual Behavior

zig/lib/zig/std/meta.zig:127:37: error: no align available for type '.cimport:1:15.struct_google_protobuf_Timestamp'
        .Optional => |info| switch (@typeInfo(info.child)) {
                                    ^
./zig-cache/o/250f5ec71ae498243a4415486ebd8496/cimport.zig:7378:94: note: called from here
    @ptrCast([*c]?*struct_google_protobuf_Timestamp, @alignCast(@import("std").meta.alignment(?*struct_google_protobuf_Timestamp), @ptrCast([*c]u8, @alignCast(@import("std").meta.alignment(u8), msg)) + @bitCast(usize, @intCast(isize, @as(c_int, 8))))).* = value;
                                                                                             ^
./zig-cache/o/250f5ec71ae498243a4415486ebd8496/cimport.zig:7374:147: note: called from here
pub fn ptest_Message_set_v(arg_msg: ?*ptest_Message, arg_value: ?*struct_google_protobuf_Timestamp) callconv(.C) void {
                                                                                                                                                  ^

pub fn ptest_Message_set_v(arg_msg: ?*ptest_Message arg_value: ?*struct_google_protobuf_Timestamp) callconv(.C) void {
    var msg = arg_msg;
    var value = arg_value;
    _upb_sethas(@ptrCast(?*const upb_Message, msg), @bitCast(usize, @as(c_long, @as(c_int, 1))));
    @ptrCast([*c]?*struct_google_protobuf_Timestamp, @alignCast(@import("std").meta.alignment(?*struct_google_protobuf_Timestamp), @ptrCast([*c]u8, @alignCast(@import("std").meta.alignment(u8), msg)) + @bitCast(usize, @intCast(isize, @as(c_int, 8))))).* = value;
}

[Vexu]

Duplicate of #10222, shouldn't be too difficult to fix if you're interested.

[calvin2021y]

You mean fixed from C source code or zig ? I am not sure where to started. (just start learn zig yesterday, try zig cc fist to see if I can use my project with zig)

[Vexu]

The bug is in Zig but after looking closer this is yet another case of #6706 so your best bet is to try to avoid this bug and wait for Zig 0.10.0 to be released.