================
@@ -261,6 +261,13 @@ AG ag = {1};
 // CHECK:   | `-BuiltinType {{.*}} 'int'
 // CHECK:   `-ParmVarDecl {{.*}} 'int'
 
+template <typename X = int>
+using BG = G<int>;
+BG bg(1.0);
+// CHECK-LABEL: Dumping <deduction guide for BG>
+// CHECK:      FunctionTemplateDecl {{.*}} implicit <deduction guide for BG>
+// CHECK: |-CXXDeductionGuideDecl {{.*}} 'auto (int) -> G<int>' aggregate
----------------
hokein wrote:

> The line is a CHECK, not a CHECK-NEXT, so it could appear any number of lines 
> afterwards.

Yeah, ideally it should be `CHECK-NEXT`, but we can't use it because of the 
ambiguity in the content of the above line (there are two other deduction 
guides emitting the same content), so I end up using the `CHECK: |-...`, it at 
least demonstrates that it is a child of something.

https://github.com/llvm/llvm-project/pull/90894
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