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+* Exercise 4
+
+Debuggers, baby!
+
+#+BEGING_SRC plaintext
+gdb --args // this flag allows you to pass arguments *through* gdb
+           // into a program, without this flag gdb assumes any
+           // passed arguments are for it
+
+gdb --batch --ex r --ex bt --ex q --args
+// run the program so that if it fails you get a backtrace
+#+END_SRC
+
+Sometimes you have lldb instead of gdb. They are similar, but slightly different -- brace yourself for this.
+