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/* { dg-do compile } */
/* { dg-options "-fdiagnostics-set-output=text:experimental-nesting=yes -fdiagnostics-text-art-charset=unicode" } */

extern void foo (void);

void test_nesting (void)
{
  foo (); /* { dg-error "top-level error" } */
}

/* { dg-begin-multiline-output "" }
  • child 0
    • grandchild 0 0
    • grandchild 0 1
    • grandchild 0 2
  • child 1
    • grandchild 1 0
    • grandchild 1 1
    • grandchild 1 2
  • child 2
    • grandchild 2 0
    • grandchild 2 1
    • grandchild 2 2
   { dg-end-multiline-output "" } */