changes in sbcl-0.9.13 relative to sbcl-0.9.12:
* new feature: source path information is generated for macro-expansion
errors for use in IDE's like Slime (thanks to Helmut Eller)
+ * bug fix: calls to the compiler no longer modify *RANDOM-STATE*
changes in sbcl-0.9.12 relative to sbcl-0.9.11:
* minor incompatible change: in sbcl-0.9.11 (but not earlier