Bug 23717 – runnable/bitfields.c:192:5: error: unknown type name S; use struct keyword to refer to the type

When compiling the test with `gcc -std=c11 -fsyntax-only` runnable/bitfields.c: In function ‘boo6’: runnable/bitfields.c:192:5: error: unknown type name ‘S’; use ‘struct’ keyword to refer to the type 192 | S s; | ^ | struct runnable/bitfields.c:193:6: error: request for member ‘a’ in something not a structure or union 193 | s.a = 3; | ^ runnable/bitfields.c:194:6: error: request for member ‘b’ in something not a structure or union 194 | s.b = 1; | ^ runnable/bitfields.c:195:6: error: request for member ‘a’ in something not a structure or union 195 | s.a += 2; | ^ runnable/bitfields.c:196:13: error: request for member ‘a’ in something not a structure or union 196 | return s.a; | ^ Test case: ``` struct S6 { unsigned int a:2, b:2; }; int boo6() { S s; s.a = 3; s.b = 1; s.a += 2; return s.a; } ```

@WalterBright created dlang/dmd pull request #14899 "fix Issue 23717 - runnable/bitfields.c:192:5: error: unknown type nam…" fixing this issue: - fix Issue 23717 - runnable/bitfields.c:192:5: error: unknown type name S; use struct keyword to refer to the typ https://github.com/dlang/dmd/pull/14899

dlang/dmd pull request #14899 "fix Issue 23717 - runnable/bitfields.c:192:5: error: unknown type nam…" was merged into master: - 3d3f11e2cbbb9047e145197ec8dd70798ad993b7 by Walter Bright: fix Issue 23717 - runnable/bitfields.c:192:5: error: unknown type name S; use struct keyword to refer to the typ https://github.com/dlang/dmd/pull/14899