…tted

Add a new field to the compiler structure that allows to be configured
so no bytecode is emitted. In this way is possible to detect errors by
walking the nodes while preserving optimizations.

Add a specific tests for dead blocks being optimized.

pablogsal changed the title bpo-37500: Make sure bytecode for always false conditional is not emmited bpo-37500: Make sure dead code does not generate bytecode

pablogsal changed the title bpo-37500: Make sure dead code does not generate bytecode bpo-37500: Make sure dead code does not generate bytecode but also detect syntax errors

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