Gentoo's Bugzilla –
Attachment 687666 Details for
Bug 768261dev-qt/qtwebengine with gcc-11: ../../../../qtwebengine-everywhere-src-5.15.2/src/3rdparty/chromium/third_party/perfetto/src/trace_processor/containers/string_pool.h:256:34: error: ‘numeric_limits’ is not a member of ‘std’