[Bug c++/89486] GCC fails to compile designated initializer use involving implicit conversion

[harald at gigawatt dot nl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89486

Harald van Dijk <harald at gigawatt dot nl> changed:

           What    |Removed                     |Added
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                 CC|                            |harald at gigawatt dot nl

--- Comment #1 from Harald van Dijk <harald at gigawatt dot nl> ---
This is a duplicate of #71446. As the error message hints, {.b = nullptr} is
treated as just {nullptr} here, so it attempts to initialise a rather than b.