http://qs321.pair.com?node_id=1063588


in reply to Re^2: how to set a breakpoint by a code reference
in thread how to set a breakpoint by a code reference

Interesting; that doesn't match perldoc perldebug.
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A math joke: r = | |csc(θ)|+|sec(θ)| |-| |csc(θ)|-|sec(θ)| |