Clang-tidy: "may throw an exception that cannot be caught" in unevaluated part of aggregate initialization - bug?

Clang Frontend clang-tidy
1

I’ve encountered cert-err58-cpp firing on the following reduced code snippet:

// main.cpp
struct callbacks {
  void (*cb)();
};

void foo() {}

const auto g_cbs = callbacks{[]() { foo(); }};
const auto g_cb = []() { foo(); };

int main() { return 0; }

Run: clang-tidy main.cpp "-checks=-*,cert-err58-cpp" --, note how it fires for g_cbs and not for g_cb:

1 warning generated.
/home/itay/tmp/err58/main.cpp:7:12: warning: initialization of 'g_cbs' with static storage duration may throw an exception that cannot be caught [cert-err58-cpp]
const auto g_cbs = callbacks{[]() { foo(); }};
           ^
/home/itay/tmp/err58/main.cpp:5:6: note: possibly throwing function declared here
void foo() {}
     ^

Would that be considered a bug?