c33ed6d Auto-sync with upstream branch release/2.29/master

Authored and Committed by fweimer 4 years ago
    Auto-sync with upstream branch release/2.29/master
    
    Upstream commit: 2ec0b166bf04e22bb6921a08bb1a1131b57889a1
    
    - Use a proper C tokenizer to implement the obsolete typedefs test
    - malloc: Fix warnings in tests with GCC
    - Fix tcache count maximum (swbz#24531)
    - dlfcn: Guard __dlerror_main_freeres with __libc_once_get (once) (swbz#24476)
    - Fix crash in _IO_wfile_sync (#1710460)
    
        
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