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ARM requires C++ constructors to return the 'this' pointer. Setting that up disables warnings at the ctor location for Wuse_after_free. Unfortunately, the nowarn_spec_t mapping maps both Wuse_after_free and Wdeprecated_declaration to the same NW_OTHER catchall group, so we don't get deprecation warnings for constructors, and libstdc++'s 20_util/pair/cons/99957.cc fails. We may want to consider also explicitly mapping Wdeprecated and Wdeprecated_declaration to another group, but this minimal change appears to be enough. for gcc/ChangeLog * gcc-diagnostic-spec.cc (nowarn_spec_t::nowarn_spec_t): Map OPT_Wuse_after_free like OPT_Wuse_after_free_.
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