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05e4993d2e
Switch the code to 0 lengh array instead. The code in Lru_cache::element_size calls sizeof on this structure. This works in gcc, but fails when using clang. Even for GCC however the documentation states: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero." Basically its an implementation quirk that clang does not support. Both GCC and clang do support zero sized arrays however so using them here allows both compilers to process this code. Ref: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html Issue #4421