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Wrote down the invariants of some common objects whose structure is
exposed in header files. Fixed a few comments in these headers. As we might have expected, writing down invariants systematically exposed a (minor) bug. In this case, function objects have a writeable func_code attribute, which could be set to code objects with the wrong number of free variables. Calling the resulting function segfaulted the interpreter. Added a corresponding test.
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12 changed files with 98 additions and 25 deletions
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@ -7,6 +7,9 @@
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extern "C" {
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#endif
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/* This is about the type 'xrange', not the built-in function range(), which
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returns regular lists. */
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/*
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A range object represents an integer range. This is an immutable object;
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a range cannot change its value after creation.
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