latest-prerelease-20250816-0352

string: use correct allocator in `replace` (#2405)

`replace` accepts an Allocator but uses `mem` instead.

Version 0.7.4

Changes / improvements

• Added const enums: enum Foo : const. Behaves like C enums but may be any type.
• Casting to / from an enum is now possible again. No need to use .ordinal and .from_ordinal.
• Inline associated enum values are deprecated, use --use-old-enums to re-enable them.
• $typeof may return a compile time type.
• Improved error messages on missing qualifier on enum value. #2260
• Add --echo-prefix to edit the prefix with $echo statements. Supports {FILE} and {LINE}
• Catch accidental foo == BAR; where foo = BAR; was most likely intended. #2274
• Improve error message when doing a rethrow in a function that doesn't return an optional.
• Add --list-asm to view all supported asm instructions.
• Formatting option "%h" now supports pointers.
• Improve error on unsigned implicit conversion to signed.
• Update error message for struct initialization #2286
• Add SipHash family of keyed PRFs. #2287
• $is_const is deprecated in favour of @is_const based on $defined.
• Multiline contract comments #2113
• Removed the use of temp allocator in backtrace printing.
• env::AUTHORS and env::AUTHOR_EMAILS added.
• Suppress codegen of panic printing with when panic messages are set to "off".
• Implicit linking of libc math when libc math functions are used.
• Allow even smaller memory limits.
• Check unaligned array access.
• Add "@structlike" for typedefs.
• "poison" the current function early when a declaration can't be correctly resolved.
• Add komihash, a5hash, metrohash64, metrohash128, and wyhash2 variants with tests/benchmark. #2293
• '$assignable' is deprecated.
• Deprecate allocator::heap() and allocator::temp()
• Add thread::fence providing a thread fence.
• Place output in out by default for projects. Use temp folder for building at the command line.
• Allow absolute paths for $embed.
• Add @try and @try_catch.
• Assignment evaluation order now right->left, following C++17 and possibly C23.

Fixes

• mkdir/rmdir would not work properly with substring paths on non-windows platforms.
• Hex string formatter check incorrectly rejected slices.
• Correctly reject interface methods type and ptr.
• Comparing a null ZString with a non-null ZString would crash.
• Switch case with const non-int / enum would be treated as ints and crash. #2263
• Missing bounds check on upper bound with const ranges foo[1:3].
• Check up the hierarchy when considering if an interface cast is valid #2267.
• Fix issue with labelled break inside of a $switch.
• Non-const macros may not return untyped lists.
• $for ct-state not properly popped.
• Inline r / complex for complex numbers fixed.
• Const slice lengths were not always detected as constant.
• Const slice indexing was not bounds checked.
• Initialize pool correctly in print_backtrace.
• --max-mem now works correctly again.
• Casting a fault to a pointer would trigger an assert.
• Make to_float more tolerant to spaces.
• Fixes to thread local pointer handling.
• Fixes to JSON parsing and Object.
• Array indices are now using int64 internally.
• Bit shift operation fails with inline uint enum despite matching underlying type #2279.
• Fix to codegen when using a bitstruct constant defined using a cast with an operator #2248.
• Function pointers are now compile time constants.
• Splat 8 arguments can sometimes cause incorrect behaviour in the compiler. #2283
• Correctly poison the analysis after a failed $assert or $error. #2284
• $foo variables could be assigned non-compile time values.
• $foo[0] = ... was incorrectly requiring that the assigned values were compile time constants.
• "Inlined at" would sometimes show the current location.
• Fixed bug splatting constants into constants.
• Resize bug when resizing memory down in ArenaAllocator, DynamicArenaAllocator, BackedArenaAllocator.
• Error message for missing arg incorrect for methods with zero args #2296.
• Fix stringify of $vaexpr #2301.
• Segfault when failing to cast subexpression to 'isz' in pointer subtraction #2305.
• Fix unexpected display of macro definition when passing a poisoned expression #2305.
• @links on macros would not be added to calling functions.
• Fix Formatter.print returning incorrect size.
• A distinct type based on an array would yield .len == 0
• Overloading addition with a pointer would not work.
• Copying const enums and regular enums incorrect #2313.
• Regression: Chaining an optional together with contracts could in some cases lose the optional.
• char[*] b = *(char[*]*)&a; would crash the compiler if a was a slice. #2320
• Implicitly cast const int expressions would sometimes not be detected as compile time const.
• Using @NoReturn in a short body macro would not work properly #2326.
• Bug when reporting error in a macro return would crash the compiler #2326.
• Short body return expression would not have the correct span.
• Fix issue where recursively creating a dir would be incorrectly marked as a failure the first time.
• @format did not work correctly with macros #2341.
• Crash when parsing recursive type declaration #2345.
• Remove unnecessary "ret" in naked functions #2344.
• Lambdas now properly follow its attributes #2346.
• Not setting android-ndk resulted in a "set ndk-path" error.
• Lambda deduplication would be incorrect when generated at the global scope.
• Disallow accessing parameters in a naked function, as well as return, this fixes #1955.
• Assigning string literal to char[<*>] stores pointer rather than characters. #2357

Stdlib changes

• Improve contract for readline. #2280
• Added Whirlpool hash.
• Added Ed25519.
• Added string::bformat.
• Virtual memory library.
• New virtual emory arena allocator.
• Added WString.len.
• Added @addr macro.
• Add ConditionVariable.wait_until and ConditionVariable.wait_for
• Added readline_to_stream that takes a stream.
• Added Ref and RefCounted experimental functionality.
• Added Volatile generic type.
• Added UnalignedRef generic type.
• Add String conversion functions snake_case -> PascalCase and vice versa.

Version 0.7.3

Changes since 0.7.2

Changes / improvements

• $typefrom now also accepts a constant string, and so works like $evaltype.
• $evaltype is deprecated in favour of $typefrom.
• Literal rules have changed, this makes -0xFF now a signed integer.
• Implicitly convert from constant typeid to Type in $Type assignment, and $assignable.
• Make $Type parameters accept constant typeid values.
• Deprecate foo.#bar.
• Allow inference across && #2172.
• Added support for custom file extensions in project.json targets.
• $eval now also works with @foo, #foo, $Foo and $foo parameters #2114.
• @sprintf macro (based on the $$sprintf builtin) allows compile time format strings #1874.
• Improve error reports when encountering a broken "if-catch".
• Add printf format to $assert and $error #2183.
• Make accepting arguments for main a bit more liberal, accepting main(int argc, ZString* argv)
• Make $echo and @sprintf correctly stringify compile time initializers and slices.
• Add --sources build option to add additional files to compile. #2097
• Support untyped second argument for operator overloading.
• The form-feed character '\f' is no longer valid white space.
• Show code that caused unreachable code #2207
• Allow generics over distinct types #2216.
• Support distrinct types as the base type of bitstructs. #2218
• Add hash::sha512 module to stdlib. #2227
• Compile time type assignment (eg $Foo = int) is no longer an expression.
• Add @allow_deprecated attribute to functions to selectively allow deprecated declarations #2223.
• Improve error message on pointer diff #2239.
• Compile-time comparison of constant vectors. #1575.
• $member.get supports bitstructs.
• $member.set for setting members without the *& trick.
• Initial support for #1925, does not affect C compilation yet, and doesn't try to link etc. Using "--emit-only"

Fixes

• -2147483648, MIN literals work correctly.
• Splatting const slices would not be const. #2185
• Fixes to $define handling of binary ops.
• Fixes methodsof to pick up all sorts of extension methods. #2192
• --lsp sometimes does not emit end tag #2194.
• Improve Android termux detection.
• Update Android ABI.
• Fixes to @format checking #2199.
• Distinct versions of builtin types ignore @operator overloads #2204.
• @operator macro using untyped parameter causes compiler segfault #2200.
• Make unreachable() only panic in safe mode.
• cflags additions for targets was not handed properly. #2209
• $echo would suppress warning about unreachable code. #2205
• Correctly format '%c' when given a width. #2199
• Fix to is_array_or_slice_of_char #2214.
• Method on array slice caused segfault #2211.
• In some cases, the compiler would dereference a compile time null. #2215
• Incorrect codegen if a macro ends with unreachable and is assigned to something. #2210
• Fix error for named arguments-order with compile-time arguments #2212
• Bug in AST copying would make operator overloading like += compile incorrectly #2217.
• $defined(#expr) broken with binary. #2219
• Method ambiguity when importing parent module publicly in private submodule. #2208
• Linker errors when shadowing @Local with public function #2198
• Bug when offsetting pointers of large structs using ++ and --.
• x++ and x-- works on pointer vectors #2222.
• x += 1 and x -= 1 works propertly on pointer vectors #2222.
• Fixes to x += { 1, 1 } for enum and pointer vectors #2222.
• Linking fails on operator method imported as @public #2224.
• Lambda C-style vaargs were not properly rejected, leading to crash #2229.
• Incorrect handling of constant null fault causing compiler crash #2232.
• Overload resolution fixes to inline typedef #2226.
• math::overflow_* wrappers incorrectly don't allow distinct integers #2221.
• Compiler segfault when using distinct type in attribute imported from other module #2234.
• Assert casting bitstruct to short/char #2237.
• @tag didn't work with members #2236.
• Assert comparing untyped lists #2240.
• Fix bugs relating to optional interface addr-of #2244.
• Compiler null pointer when building a static-lib with -o somedir/... #2246
• Segfault in the compiler when using a bitstruct constant defined using a cast with an operator #2248.
• Default assert() message drops parens #2249.

Stdlib changes

• Deprecate String.is_zstr and String.quick_zstr #2188.
• Add comparison with == for ZString types.
• is_array_or_slice_of_char and is_arrayptr_or_slice_of_char are replaced by constant @ variants.
• @pool now has an optional reserve parameter, some minor changes to the temp_allocator API
• io::struct_to_format now supports bitstructs.
• Add String.escape, String.unescape for escaping and unescaping a string.

Version 0.7.2

Changelist

Changes / improvements

• Better default assert messages when no message is specified #2122
• Add --run-dir, to specify directory for running executable using compile-run and run #2121.
• Add run-dir to project.json.
• Add quiet to project.json.
• Deprecate uXX and iXX bit suffixes.
• Add experimental LL / ULL suffixes for int128 and uint128 literals.
• Allow the right hand side of ||| and &&& be runtime values.
• Added @rnd() compile time random function (using the $$rnd() builtin). #2078
• Add math::@ceil() compile time ceil function. #2134
• Improve error message when using keywords as functions/macros/variables #2133.
• Deprecate MyEnum.elements.
• Deprecate SomeFn.params.
• Improve error message when encountering recursively defined structs. #2146
• Limit vector max size, default is 4096 bits, but may be increased using --max-vector-size.
• Allow the use of has_tagof on builtin types.
• @jump now included in --list-attributes #2155.
• Add $$matrix_mul and $$matrix_transpose builtins.
• Add d as floating point suffix for double types.
• Deprecate f32, f64 and f128 suffixes.
• Allow recursive generic modules.
• Add deprecation for @param foo "abc".
• Add --header-output and header-output options for controlling header output folder.
• Generic faults is disallowed.

Fixes

• Assert triggered when casting from int[2] to uint[2] #2115
• Assert when a macro with compile time value is discarded, e.g. foo(); where foo() returns an untyped list. #2117
• Fix stringify for compound initializers #2120.
• Fix No index OOB check for [:^n] #2123.
• Fix regression in Time diff due to operator overloading #2124.
• attrdef with any invalid name causes compiler assert #2128.
• Correctly error on @attrdef Foo = ;.
• Contract on trying to use Object without initializing it.
• Variable aliases of aliases would not resolve correctly. #2131
• Variable aliases could not be assigned to.
• Some folding was missing in binary op compile time resolution #2135.
• Defining an enum like ABC = { 1 2 } was accidentally allowed.
• Using a non-const as the end range for a bitstruct would trigger an assert.
• Incorrect parsing of ad hoc generic types, like Foo{int}**** #2140.
• $define did not correctly handle generic types #2140.
• Incorrect parsing of call attributes #2144.
• Error when using named argument on trailing macro body expansion #2139.
• Designated const initializers with {} would overwrite the parent field.
• Empty default case in @jump switch does not fallthrough #2147.
• &&& was accidentally available as a valid prefix operator.
• Missing error on default values for body with default arguments #2148.
• --path does not interact correctly with relative path arguments #2149.
• Add missing @noreturn to os::exit.
• Implicit casting from struct to interface failure for inheriting interfaces #2151.
• Distinct types could not be used with tagof #2152.
• $$sat_mul was missing.
• for with incorrect var declaration caused crash #2154.
• Check pointer/slice/etc on [out] and & params. #2156.
• Compiler didn't check foreach over flexible array member, and folding a flexible array member was allowed #2164.
• Too strict project view #2163.
• Bug using #foo arguments with $defined #2173
• Incorrect ensure on String.split.
• Removed the naive check for compile time modification, which fixes #1997 but regresses in detection.

Stdlib changes

• Added String.quick_ztr and String.is_zstr
• std::ascii moved into std::core::ascii. Old _m variants are deprecated, as is uint methods.
• Add String.tokenize_all to replace the now deprecated String.splitter
• Add String.count to count the number of instances of a string.
• Add String.replace and String.treplace to replace substrings within a string.
• Add Duration * Int and Clock - Clock overload.
• Add DateTime + Duration overloads.
• Add Maybe.equals and respective == operator when the inner type is equatable.
• Add inherit_stdio option to SubProcessOptions to inherit parent's stdin, stdout, and stderr instead of creating pipes. #2012
• Remove superfluous cleanup parameter in os::exit and os::fastexit.
• Add extern fn ioctl(CInt fd, ulong request, ...) binding to libc;

Version 0.7.1

0.7.1 Change list

Changes / improvements

• Better errors on some common casting mistakes (pointer->slice, String->ZString, deref pointer->array) #2064.
• Better errors trying to convert an enum to an int and vice versa.
• Function @require checks are added to the caller in safe mode. #186
• Improved error message when narrowing isn't allowed.
• Operator overloading for + - * / % & | ^ << >> ~ == != += -= *= /= %= &= |= ^= <<= >>=
• Add @operator_r and @operator_s attributes.
• More stdlib tests: sincos, ArenaAllocator, Slice2d.
• Make aliases able to use @deprecated.
• Refactored stdlib file organization.
• Allow @if on locals.
• String str = "" is now guaranteed to be null terminated. #2083
• Improved error messages on Foo { 3, abc } #2099.
• Foo[1..2] = { .baz = 123 } inference now works. #2095
• Deprecated old inference with slice copy. Copying must now ensure a slicing operator at the end of the right hand side: foo[1..2] = bar[..] rather than the old foo[1..2] = bar. The old behaviour can be mostly retained with --use-old-slice-copy).
• Added Enum.lookup and Enum.lookup_field.
• c3c build picks first target rather than the first executable #2105.
• New Win32 Mutex, ConditionVariable and OnceFlag implementation

Fixes

• Trying to cast an enum to int and back caused the compiler to crash.
• Incorrect rounding at compile time going from double to int.
• Regression with invalid setup of the WASM temp allocator.
• Correctly detect multiple overloads of the same type.
• ABI bug on x64 Linux / MacOS when passing a union containing a struct of 3 floats. #2087
• Bug with slice acces as inline struct member #2088.
• @if now does implicit conversion to bool like $if. #2086
• Fix broken enum inline -> bool conversions #2094.
• @if was ignored on attrdef, regression 0.7 #2093.
• @ensure was not included when the function doesn't return a value #2098.
• Added missing @clone_aligned and add checks to @tclone
• Comparing a distinct type with an enum with an inline distinct type failed unexpectedly.
• The %s would not properly print function pointers.
• Compiler crash when passing an untyped list as an argument to assert #2108.
• @ensure should be allowed to read "out" variables. #2107
• Error message for casting generic to incompatible type does not work properly with nested generics #1953
• Fixed enum regression after 0.7.0 enum change.
• ConditionVariable now properly works on Win32

Stdlib changes

• Hash functions for integer vectors and arrays.
• Prefer math::I and math::I_F for math::IMAGINARY and math::IMAGINARYF the latter is deprecated.
• Add array::contains to check for a value in an array or slice.

Version 0.7.0

Changes / improvements

• Removed Foo { 1, 2 } initializer.
• Changed Foo(<int>) to Foo {int}.
• Removed {| |} expression blocks.
• Removed macro &ref and $varef parameters.
• Removed $vaexpr(0) syntax in favour of $vaexpr[0]
• Enum does not cast to/from an integer (its ordinal).
• Removed use of void! for main, test and benchmark functions.
• Removed $or, $and, $concat compile time functions.
• Removed @adhoc attribute.
• Disallow inline use of nested generics (e.g. List{List{int}}.
• Remove .allocator = allocator syntax for functions.
• Remove @operator(construct).
• Removal of "any-switch".
• Allow swizzling assign, eg. abc.xz += { 5, 10 };
• Added $$wstr16 and $$wstr32 builtins.
• $foreach "()" replaced by trailing ":" $foreach ($x, $y : $foo) -> $foreach $x, $y : $foo:
• $for "()" replaced by trailing ":" $for (var $x = 0; $x < FOO; $x++) -> $for var $x = 0; $x < FOO; $x++:
• $switch "()" replaced by trailing ":" $switch ($Type) -> $switch $Type:
• Empty $switch requires trailing ":" $switch -> $switch:
• Rename @return! to @return? and change syntax to require ":" after faults.
• Remove if (catch foo) { case ... } syntax.
• Remove [?] syntax.
• Change int! to int? syntax.
• New fault declaration using faultdef.
• Enum associated values can reference the calling enum.
• Improve error message on foo ?? io::EOF with missing '?' #2036
• Make @public import recursive. #2018
• Fault nameof prefixes the first last module path, for instance std::io::EOF is rendered as io::EOF.
• Rename def to alias.
• Change distinct -> typedef.
• Order of attribute declaration is changed for alias.
• Added LANGUAGE_DEV_VERSION env constant.
• Rename anyfault -> fault.
• !!foo now works same as as ! ! foo.
• Temp allocator now supports more than 2 in-flight stacks.
• Printing stacktrace uses its own temp allocator.
• Allow inferred type on body parameters. E.g. @stack_mem(1024; alloc) { ... };
• Use @pool_init() to set up a temp pool on a thread. Only the main thread has implicit temp pool setup.
• tmem is now a variable.
• Compile test and benchmark functions when invoking --lsp #2058.
• Added @format attribute for compile time printf validation #2057.
• Formatter no longer implicitly converts enums to ordinals.

Fixes

• Fix address sanitizer to work on MachO targets (e.g. MacOS).
• Post and pre-decrement operators switched places for vector elements #2010.
• Aliases were incorrectly considered compile time constants.
• FreeBSD libc stat definitions were incorrect.
• Atomic max was incorrect.
• "+".to_float() would panic.
• import can now both be @public and @norecurse.
• Crash when trying to convert a struct slice to a vector #2039.
• Crash resolving a method on Foo[2] when Foo is distinct #2042.
• Bug due to missing cast when doing $i[$x] = $z.
• Incorrectly allowed getting pointer to a macro #2049.
• &self not runtime null-checked in macro #1827.
• Bug when printing a boolean value as an integer using printf.
• Show error when a generic module contains a self-generic type.
• "Single module" was not enforced when creating a static library using as a project target.

Stdlib changes

• new_* functions in general moved to version without new_ prefix.
• string::new_from_* changed to string::from_*.
• String.to_utf16_copy and related changed to String.to_utf16.
• String.to_utf16_tcopy and related changed to String.to_temp_utf16
• mem::temp_new changed to mem::tnew.
• mem::temp_alloc and related changed to mem::talloc.
• mem::temp_new_array changed to mem::temp_array.
• Add ONHEAP variants for List/HashMap for initializing global maps on the heap.
• Remove Vec2 and other aliases from std::math. Replace .length_sq() with sq_magnitude()
• Change all hash functions to have a common hash function.
• @wstring, @wstring32, @char32 and @char16 compile time macros added.
• Updates to Atomic to handle distinct types and booleans.
• Added math::iota.
• @pool no longer takes an argument.
• Allocator interface removes mark and reset.
• DynamicArenaAllocator has changed init function.
• Added BackedArenaAllocator which is allocated to a fixed size, then allocates on the backing allocator and supports mark/reset.
• AnyList now also defaults to the temp allocator.
• os::getcwd and os::get_home_dir requires an explicit allocator.
• file::load_new and file::load_path_new removed.
• os::exit and os::fastexit added.

Version 0.6.8

Changes / improvements

• Increase precedence of (Foo) { 1, 2 }
• Add --enable-new-generics to enable Foo{int} generic syntax.
• {| |} expression blocks deprecated.
• c3c --test-leak-report flag for displaying full memory lead report if any
• Output into /.build/obj/ by default.
• Output llvm/asm into llvm/ and asm/ by default.
• Add flag --suppress-run. For commands which may run executable after building, skip the run step. #1931
• Add --build-env for build environment information.
• Deprecation of @operator(construct).

Fixes

• Bug appearing when ?? was combined with boolean in some cases.
• Test runner --test-disable-sort didn't work, c3c was expecting --test-nosort
• Test runner with tracking allocator assertion at failed test #1963
• Test runner with tracking allocator didn't properly handle teardown_fn
• Correctly give an error if a character literal contains a line break.
• Implicitly unwrapped optional value in defer incorrectly copied #1982.
• Crash when trying to define a method macro that isn't @construct but has no arguments.
• Regression, .gitkeep files were generated incorrectly.
• Aliases are now correctly handled as if they were variables/functions in regards to namespacing and accept @builtin.
• Correctly handle in/out when interacting with inout.
• Don't delete .o files not produced by the compiler.
• Fix optional jumps in expression lists, #1942.
• Several fixes for .o files and -o output, improving handling and naming.
• Fix bug casting bool to int to other int #1995.
• @if declarations were missing from -P output #1973.
• Check exe and lib output so -o works with directories.
• Swizzling an inline vector in a struct would cause a crash.
• Fixed error and poor error message when using an invalid target name.

Version 0.6.7

C3 version 0.6.7

Changes / improvements

• Contracts @require/@Ensure are no longer treated as conditionals, but must be explicitly bool.
• Add win-debug setting to be able to pick dwarf for output #1855.
• Error on switch case fallthough if there is more than one newline #1849.
• Added flags to c3c project view to filter displayed properties
• Compile time array assignment #1806.
• Allow +++ to work on all types of arrays.
• Allow (int[*]) { 1, 2 } cast style initialization.
• Experimental change from [*] to [?]
• Warn on if-catch with just a default case.
• Compile time array inc/dec.
• Improve error message when using ',' in struct declarations. #1920
• Compile time array assign ops, e.g. $c[1] += 3 #1890.
• Add inline to enums #1819.
• Cleaner error message when missing comma in struct initializer #1941.
• Distinct inline void causes unexpected error if used in slice #1946.
• Allow fn int test() => @pool() { return 1; } short function syntax usage #1906.
• Test runner will also check for leaks.
• Improve inference on ?? #1943.
• Detect unaligned loads #1951.

Fixes

• Fix issue requiring prefix on a generic interface declaration.
• Fix bug in SHA1 for longer blocks #1854.
• Fix lack of location for reporting lambdas with missing return statement #1857.
• Compiler allows a generic module to be declared with different parameters #1856.
• Fix issue with @const where the statement $foo = 1; was not considered constant.
• Const strings and bytes were not properly converted to compile time bools.
• Concatenating a const empty slice with another array caused a null pointer access.
• Fix linux-crt and linux-crtbegin not getting recognized as a project paramater
• Fix dues to crash when converting a const vector to another vector #1864.
• Filter $exec output from \r, which otherwise would cause a compiler assert #1867.
• Fixes to `"exec" use, including issue when compiling with MinGW.
• Correctly check jump table size and be generous when compiling it #1877.
• Fix bug where .min/.max would fail on a distinct int #1888.
• Fix issue where compile time declarations in expression list would not be handled properly.
• Issue where trailing body argument was allowed without type even though the definition specified it #1879.
• Fix issues with @jump on empty default or only default #1893 #1894
• Fixes miscompilation of nested @jump #1896.
• Fixed STB_WEAK errors when using consts in macros in the stdlib #1871.
• Missing error when placing a single statement for-body on a new row #1892.
• Fix bug where in dead code, only the first statement would be turned into a nop.
• Remove unused $inline argument to mem::copy.
• Defer is broken when placed before a $foreach #1912.
• Usage of @NoReturn macro is type-checked as if it returns #1913.
• Bug when indexing into a constant array at compile time.
• Fixing various issues around shifts, like z <<= { 1, 2 }.
• return (any)&foo would not be reported as an escaping variable if foo was a pointer or slice.
• Incorrect error message when providing too many associated values for enum #1934.
• Allow function types to have a calling convention. #1938
• Issue with defer copying when triggered by break or continue #1936.
• Assert when using optional as init or inc part in a for loop #1942.
• Fix bigint hex parsing #1945.
• bigint::from_int(0) throws assertion #1944.
• write of qoi would leak memory.
• Issue when having an empty Path or just "."
• set_env would leak memory.
• Fix issue where aligned bitstructs did not store/load with the given alignment.
• Fix issue in GrowableBitSet with sanitizers.
• Fix issue in List with sanitizers.
• Circumvent Aarch64 miscompilations of atomics.
• Fixes to ByteBuffer allocation/free.
• Fix issue where compiling both for asm and object file would corrupt the obj file output.
• Fix poll and POLL_FOREVER.
• Missing end padding when including a packed struct #1966.
• Issue when scalar expanding a boolean from a conditional to a bool vector #1954.
• Fix issue when parsing bitstructs, preventing them from implementing interfaces.
• Regression String! a; char* b = a.ptr; would incorrectly be allowed.
• Fix issue where target was ignored for projects.
• Fix issue when dereferencing a constant string.
• Fix problem where a line break in a literal was allowed.

Stdlib changes

• Added '%h' and '%H' for printing out binary data in hexadecimal using the formatter.
• Added weakly linked __powidf2
• Added channels for threads.
• New std::core::test module for unit testing machinery.
• New unit test default runner.
• Added weakly linked fmodf.
• Add @select to perform the equivalent of a ? x : y at compile time.
• HashMap is now Printable.
• Add allocator::wrap to create an arena allocator on the stack from bytes.