Bug 22624 – ImportC: struct members in static initializer misaligned following bit field

mod.c: --- struct cstruct { unsigned int bit : 1; }; --- main.d: --- import std.stdio; import mod; struct dstruct { cstruct x; ubyte[8] msg = [1, 2, 3, 4, 5, 6, 7, 8]; } void main() { dstruct v; writeln(v.msg); assert(dstruct.init.msg == [1, 2, 3, 4, 5, 6, 7, 8]); // ok assert(v.msg == [1, 2, 3, 4, 5, 6, 7, 8]); // error } --- it should print the array as written in the source, but instead it prints [0, 0, 0, 0, 1, 2, 3, 4] version: DMD64 D Compiler v2.098.0-361-g415e58e6d (current git master)

A simpler test case: import core.stdc.stdio; import mod; struct S { cstruct b; ulong y = 0x1234_0000_5678; } void main() { S s; printf("%llx\n", s.y); } prints 567800000000

@WalterBright created dlang/dmd pull request #13564 "fix Issue 22624 - ImportC: struct members in static initializer misal…" fixing this issue: - fix Issue 22624 - ImportC: struct members in static initializer misaligned following bit field https://github.com/dlang/dmd/pull/13564

dlang/dmd pull request #13564 "fix Issue 22624 - ImportC: struct members in static initializer misal…" was merged into master: - 687bcb3fd6e51110a469b33161d8f1f4785e9acb by Walter Bright: fix Issue 22624 - ImportC: struct members in static initializer misaligned following bit field https://github.com/dlang/dmd/pull/13564