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*** Changes since GDB 7.6
+* New convenience function "$_isvoid", to check whether an expression
+ is void. A void expression is an expression where the type of the
+ result is "void". For example, some convenience variables may be
+ "void" when evaluated (e.g., "$_exitcode" before the execution of
+ the program being debugged; or an undefined convenience variable).
+ Another example, when calling a function whose return type is
+ "void".
+
* The "maintenance print objfiles" command now takes an optional regexp.
* The "catch syscall" command now works on arm*-linux* targets.