C99 designated initializers broken with nested anonymous union

[negge]

With C99 you can use designated initializers to set struct fields in any order. This code works fine with wcc386:

typedef struct Test Test;

struct Test {
  short a;
  unsigned b;
};

Test test[] = {
  { .a = 1, .b = 2 },
  { .b = 3, .a = 2 },
};

However, if you include an anonymous union this is no longer true:

typedef struct TestBad TestBad;

struct TestBad {
  short a;
  union {
    float c;
    unsigned b;
  };
};

TestBad test_bad[] = {
  { .a = 1, .b = 2 },
  { .b = 3, .a = 2 },
};

Compiling with Version 2.0 beta Jun 1 2024 01:58:48 (32-bit) I get the following error:

$ wcc386 -q test_bad.c 
test_bad.c(13): Error! E1118: ***FATAL*** Bad initializer quad

[jmalak]

Thanks for your bug report.