src/Sema.zig                                                     | 36 ++++++++++++++++++++++++-----
 test/cases/compile_errors/int_literal_passed_as_variadic_arg.zig | 11 ---------
 test/cases/compile_errors/variadic_arg_validation.zig            | 29 ++++++++++++++++++++++++
 test/standalone.zig                                              |  1 +
 test/standalone/issue_12706/build.zig                            | 39 ++++++++++++++++++++++++++++++++
 test/standalone/issue_12706/main.zig                             | 12 ++++++++++
 test/standalone/issue_12706/test.c                               | 11 +++++++++
 7 files changed, 122 insertions(+), 17 deletions(-)