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Is this about what you wanted, and are my comments on the mark?
If so, how do you feel about a mass replacement of the one deprecated construct (deprecated_selected_frame) with the new deprecated construct (deprecated_safe_get_selected_frame) in the places in GDB which use this "if frame arg is NULL, get selected frame" idiom?
+/* This is a variant of get_selected_frame which can be called when the + inferior is not running; in that case it will return NULL instead of + calling error (). */
+struct frame_info * +deprecated_safe_get_selected_frame (void) +{ + if (!target_has_registers || !target_has_stack || !target_has_memory) + return NULL; + return get_selected_frame (); +}
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