[cxx-interop] Fix spurious lifetime dependence errors #78807
Merged
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ClangImporter will generate value and default initializers for certain structs imported from C++. These generated initializers have no associated lifetime dependence information so they will trigger spurious errors for non-escapable types. This patch makes sure these are marked as unsafe so the type checker will not generate errors for them. Moreover, the generated default initializer would trigger a crash for non-escapable types as the builtin to zero initialize an object does not support non-escapable types yet.
rdar://143040862