marcobambini/gravity

📋 What's Changed

• fix(core): move gravity_opt_free after refcount check to prevent double-free by @barchett in https://github.com/marcobambini/gravity/pull/436

✨ New Contributors

• @barchett made their first contribution in https://github.com/marcobambini/gravity/pull/436
• Full Changelog: https://github.com/marcobambini/gravity/compare/v0.9.5...0.9.6

📦 Gravity v0.9.5

• Extensive bug fixes, memory safety improvements, and new documentation.

📦 Compiler

• Fix off-by-one in lexer PEEK_NEXT/PEEK_NEXT2 boundary checks
• Fix memory leaks in parser (parse_file_expression, parse_variable_declaration, string interpolation)
• Fix wrong constant in semacheck2 upvalue limit error message
• Fix wrong variable name in for-loop register allocation in codegen
• Fix multiple early-return paths in visit_postfix_expr leaking arrays (replaced with goto cleanup)
• Fix register clobbering in LOCATION_CLASS_IVAR_OUTER assignment
• Fix constant folding and NEG optimization checking/writing wrong registers
• Fix OPCODE_SET_FOUR8bit macro missing opcode field
• + 2 more

📦 Runtime / VM

• Fix boolean fast-path comparison incorrectly applied to ordered comparisons (LT, GT, LEQ, GEQ) — now restricted to EQ/NEQ only
• Fix crash in gravity_vm_setslot/gravity_vm_getslot when no frames exist
• Fix list_iterator_next out-of-bounds read
• Fix range_contains not handling reversed ranges
• Fix function_exec default-arg filling using wrong index formula
• Fix int_random truncation from gravity_int_t to int
• Fix string_count broken partial-match logic (rewrite using string_strnstr)
• Fix string_upper/string_lower off-by-one (iterated one byte past end)
• + 7 more

📦 Optional Modules

• Math: fix atan2f for float builds; use POW macro consistently; fix division-by-zero in logx when base=1; fix integer overflow in random; fix pointer bugs in round
• File: fix memory leaks in buildpath and directory scan; fix wrong nargs in open; fix leaked FILE* on failure; fix crash on negative read size; fix swapped fread/fwrite arguments
• JSON: rewrite string escaping to properly handle backslashes, quotes, and control characters
• ENV: add Windows compatibility for environ access

📦 Shared / Data Structures

• Fix marray_push updating capacity before confirming realloc success
• Fix marray_resize/marray_resize0 to check realloc result
• Fix gravity_hash_memsize counting buckets as nodes
• Improve float hashing precision (%f → %.17g)
• Add overflow guard to gravity_function_cpool_add

📦 Utilities

• Fix buffer overflow in debug DUMP_VM macros
• Fix memory leak in gravity_disassemble
• Fix escape buffer too small in JSON serializer
• Fix swapped PathCombineA arguments on Windows
• Fix file_name_frompath returning NULL when no separator
• Add NULL check in string_dup
• Fix signed arithmetic in number_from_bin

📦 CLI

• Fix memory leaks in unittest_scan and inline execution

📝 Documentation

• Add comprehensive [ARCHITECTURE.md](ARCHITECTURE.md) covering the full compilation pipeline, VM internals, value system, garbage collector, instruction set, and embedding API
• Update README.md with Building, Usage, and Project Structure sections; update line counts; enhance Features list

🧪 Tests

• Add 30 new unit tests covering all major bug fixes

📋 Changes

• Several leaks and bugs fixed
• New unit tests added