1; RUN: not llvm-as < %s -o /dev/null 2>&1 | FileCheck %s
2
3; Check the error message on using ", ..." when we can't actually forward
4; varargs.
5
6%struct.A = type { i32 }
7
8declare i8* @f(i8*, ...)
9
10define i8* @f_thunk(i8* %this) {
11  %rv = musttail call i8* (i8*, ...) @f(i8* %this, ...)
12; CHECK: error: unexpected ellipsis in argument list for musttail call in non-varargs function
13  ret i8* %rv
14}
15