the thunk, as a keyword argument, :arguments.
* optimization: extracting bits of a single-float on x86-64 has been
optimized. (lp#555201)
+ * meta-optimization: improved compilation speed, especially for large
+ functions. (lp#792363 and lp#394206)
* bug fix: bound derivation for floating point operations is now more
careful about rounding possibly closing open bounds. (lp#793771)
* bug fix: SB-POSIX:SYSCALL-ERROR's argument is now optional. (accidental