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I recently learned that move constructors generally should be marked "noexcept". This ensures that standard containers will move objects when possible, rather than copy them. This patch fixes the cases I could find. Note that implicitly-defined or defaulted move constructors will automatically do what you'd expect; that is, they are noexcept if all the members have noexcept move constructors. While doing this, I noticed a couple of odd cases where the move constructor seemed to assume that the object being constructed could have state requiring destruction. I've fixed these as well. See completion_result and scoped_mmap. gdb/ChangeLog 2020-04-20 Tom Tromey <tromey@adacore.com> * python/python.c (struct gdbpy_event): Mark move constructor as noexcept. * python/py-tui.c (class gdbpy_tui_window_maker): Mark move constructor as noexcept. * completer.h (struct completion_result): Mark move constructor as noexcept. * completer.c (completion_result::completion_result): Use initialization style. Don't call reset_match_list. gdbsupport/ChangeLog 2020-04-20 Tom Tromey <tromey@adacore.com> * scoped_mmap.h (scoped_mmap): Mark move constructor as noexcept. Use initialization style. Don't call destroy. * scoped_fd.h (class scoped_fd): Mark move constructor as noexcept. * gdb_ref_ptr.h (class ref_ptr): Mark move constructor as noexcept.