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1// RUN: %clang_cc1 -verify -std=c2y -Wall -pedantic %s
2// expected-no-diagnostics
3
4/* WG14 N3262: Yes
5 * Usability of a byte-wise copy of va_list
6 *
7 * NB: Clang explicitly documents this as being undefined behavior. A
8 * diagnostic is produced for some targets but not for others for assignment or
9 * initialization, but no diagnostic is possible to produce for use with memcpy
10 * in the general case, nor with a manual bytewise copy via a for loop.
11 *
12 * Therefore, nothing is tested in this file; it serves as a reminder that we
13 * validated our documentation against the paper. See
14 * clang/docs/LanguageExtensions.rst for more details.
15 *
16 * FIXME: it would be nice to add ubsan support for recognizing when an invalid
17 * copy is made and diagnosing on copy (or on use of the copied va_list).
18 */
19
20int main() {}
21