[Bug c++/127598] Forward declared classes / struct, fail with "bad file data" when further defined with an implementation that contains a lambda (c++ modules)

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127598

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
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