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| Name | Modified | Size | Downloads / Week |
|---|---|---|---|
| Parent folder | |||
| README.md | 2025-06-29 | 2.8 kB | |
| SBCL 2.5.6 source code.tar.gz | 2025-06-29 | 10.4 MB | |
| SBCL 2.5.6 source code.zip | 2025-06-29 | 11.4 MB | |
| Totals: 3 Items | 21.8 MB | 0 | |
- enhancement: the compiler now recognizes when local functions (both named and anonymous) are used only as downward funargs in many situations and can stack allocate such closures even without explicit dynamic extent declarations. See the updated manual entry on stack allocation for more information and how user-code can declare funargs as downward.
- minor incompatible change: optimization notes for a variable declared to be of type LIST will not be emitted for various transforms which are defined to operate on (OR NULL VECTOR).
- minor incompatible change: some forms, including a THE form with an invalid type specifier, or a CASE form with bad entries, no longer produce a runtime error. (They continue to provide a full warning at compile-time).
- platform support ** on arm64, breakpoint-based stepping is now thread-safe. ** on arm64, backtraces after interrupts should be more correct. ** on x86-64 with the immobile-space feature, calling from assembly routines to lisp routines is more efficient. ** if arenas are enabled, users can define a lisp function to act as a handler to customize behaviour on arena exhaustion.
- bug fix: address several bugs related to dynamic-extent declarations, inference, and stack allocation.
- bug fix: the stack return page protection is temporarily disabled during GC, so that GC can complete even if it needs to write in the return page.
- bug fix: the compiler generates code to the right entry point for specialized functions. (lp#2111876, reported by Matt Kaufmann)
- bug fix: the compiler's constraint derivation would sometimes not terminate. (lp#2113747)
- bug fix: when the runtime structure representing a thread is re-used, the stack guard pages are restored.
- bug fix: type checks for &OPTIONAL arguments are done only once.
- bug fix: CEILING's docstring was wrong. (reported by Dave Tenny)
- bug fix: APPLY could be called with too many arguments when parsing MEMBER type specifications. (reported by Zach Beane)
- bug fix: the compiler could allow constant values of bad types to trigger optimizations. (lp#2113977)
- bug fix: internal compiler error when attempting to write out a type check for a value already proved to never exist (i.e. be of type NIL). (lp#2112475)
- optimization: better division for signed-word dividends and unsigned-word divisors on arm64 and x86-64.
- optimization: improvements to subtraction involving bignums and words on x86-64.
- optimization: perfect-hash-based transformations are applied to sequence functions with keys including fixnums and characters as well as symbols.