[Haskell-cafe] Just found GHCI can be used as a debugger

[Yves Parès]

Hello,

By randomly typing :<Tab> under GHCI, I discovered it could be used as a
debugger (:breakpoint, :step, etc.)
Three questions in that regard:
1) Is there some documentation about it?
2) I haven't investigated much, is that fairly thorough and convenient?
Does some people over here use those functions on a regular basis?
3) Is it possible to save the state (notably to save the position of the
breakpoints)?

Thanks!
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