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[racket] Statistical profiler doesn't return a complete report with JIT

From: Diogo F. S. Ramos (diogofsr at gmail.com)
Date: Fri Nov 16 10:46:44 EST 2012		 
Matthew Flatt <mflatt at cs.utah.edu> writes:

> Does the executable from the package have debugging info stripped away?
> The Racket JIT needs some DWARF information to reconstruct the call
> stack for backtraces and profiling on x86_64.

I don't know if my method is conclusive, but running `gdb' with the
package's executable tells me this:

  Reading symbols from /usr/bin/racket...(no debugging symbols
  found)...done.
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