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Bug#157131: PROPOSAL] Suggest to minimize optimization when DEB_BUILD_OPTIONS contains "debug"

This would lose a feature that I find valuable: usually, recompiling 
a package with the debug option will generate a binary whose symbols
are compatible with the "normal" packaged binary.  I have used this
several times to chase down hard-to-find library compatibility bugs,
or to interpret core-files from crashes that are difficult to reproduce.

For that matter, there are also Heisenbugs to consider: some bugs only
appear in the optimized version, not the un-optimized.  Compiling the
debugging version with different optimization flags would make tracking
down these bugs needlessly difficult.

For what it's worth, I have never had a problem with debugging optimized
code.  The line numbers sometimes jump around a bit, but always in a
predictable way.

Richard Braakman
"I sense a disturbance in the force"
"As though millions of voices cried out, and ran apt-get."
  (Anthony Towns about the Debian 3.0 release)

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