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[C++20] [Modules] Fix the duplicated static initializer problem (#114193
) Reproducer: ``` //--- a.cppm export module a; int func(); static int a = func(); //--- a.cpp import a; ``` The `func()` should only execute once. However, before this patch we will somehow import `static int a` from a.cppm incorrectly and initialize that again. This is super bad and can introduce serious runtime behaviors. And also surprisingly, it looks like the root cause of the problem is simply some oversight choosing APIs. (cherry picked from commit 259eaa6)
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