This patch release contains several security fixes: Security fix OSEC-2026-21: Str.string_partial_match Security fix OSEC-2026-22: potential overflow in data file inUnix.map_file Security fix OSEC-2026-23: multiple issues in demarshaling Security fix OSEC 2026-24: multiple issues in command quoting on Windows Security fixOSEC-2026-25: runtime events library, harden decoding of events Security fix…
Type system bug fix for module-dependent functions Security fix: overflow in Marshal Security fix: overflow in bytecode loading Various runtime fixes Restore cloning support on macOS See detailed list of changes.
Revisit generic printing API
Some of the highlights of OCaml 5.5.0 are: Module-dependent functions Polymorphic functions as function arguments Relocatable compiler Generalized local definitions Search and replace substring functions External types Garbage collector improvements Around 60 new functions in the standard library
Security fix for check for size overflow in caml_ba_reshape (CVE-2026-34353, OSEC-2026-04) Security fix for quoting of filenames passed to Filename.quote_command on Windows Bug fixes for 4.14.3 See detailed list of changes.
release 5.5.0~rc1
Bootstrap (probably not necessary)
release 5.5.0~beta1
release 5.5.0~alpha3
release 5.5.0~alpha2
release 5.5.0~alpha1
Bug fixes. See detailed list of changes.
Bug fixes. See detailed list of changes.
Some of the highlights of OCaml 5.4.0 are: Labelled tuples Immutable arrays Array literal syntax support for immutable arrays and floatarrays (through type-directed disambiguation) Atomic record fields Four new standard library modules: Pair, Pqueue, Repr, and Iarray Restored "memory cleanup upon exit" mode New chapter in the manual on profiling OCaml programs on Linux and macOS And a lot of incre…