0.25.0

New features and breaking changes

• (breaking-change) Time zones has been added to Time. (#5324, #5819, thanks @straight-shoota)
• (breaking-change) Drop HTTP.rfc1123_date in favor of HTTP.format_time and add time format implementations for ISO-8601, RFC-3339, and RFC-2822. (#5123, thanks @straight-shoota)
• (breaking-change) crystal deps is removed, use shards. (#5544, thanks @asterite)
• (breaking-change) Hash#key was renamed as Hash#key_for. (#5444, thanks @marksiemers)
• (breaking-change) JSON::Any and YAML::Any have been re-implemented solving some inconsistencies and avoiding the usage of recursive aliases (JSON::Type and YAML::Type have been removed). (#5183, thanks @asterite)
• (breaking-change) Multiple heredocs can be used as arguments and methods can be invoked writing them in the initial delimiter, also empty heredocs are now supported. (#5578, #5602, #6048, thanks @asterite and @makenowjust)
• (breaking-change) Refactor signal handlers and avoid closing pipe at exit. (#5730, thanks @ysbaddaden)
• (breaking-change) Improve behaviour of File.join with empty path component. (#5915, thanks @straight-shoota)
• (breaking-change) Drop Colorize#push in favor of Colorize#surround and allow nested calls across the stack. (#4196, thanks @makenowjust)
• (breaking-change) File.stat was renamed to File.info and a more portable API was implemented. (#5584, #6161, thanks @RX14 and @bcardiff)
• (breaking-change) Refactor HTTP::Server to bind to multiple addresses. (#5776, #5959, thanks @straight-shoota)
• (breaking-change) Remove block argument from loop. (#6026, thanks @asterite)
• (breaking-change) Do not collapse unions for sibling types. (#6024, thanks @asterite)
• (breaking-change) Disallow typeof in type restrictions. (#5192, thanks @asterite)
• (breaking-change) Perform unbuffered read when IO::Buffered#sync = true. (#5849, thanks @RX14)
• (breaking-change) Drop when _ support. (#6150, thanks @makenowjust)
• (breaking-change) The DivisionByZero exception was renamed to DivisionByZeroError. (#5395, thanks @sdogruyol)
• A bootstrap windows port has been added to the standard library. It's not usable for real programs yet. (#5339, #5484, #5448, thanks @RX14)
• Add automatic casts on literals arguments for numbers and enums. (#6074, thanks @asterite)
• Add user defined annotations. (#6063, #6084, #6106, thanks @asterite)
• Add macro verbatim blocks to avoid nested macros. (#6108, thanks @asterite)
• Allow namespaced expressions to define constants eg: Foo::Bar = 1. (#5883, thanks @bew)
• Allow trailing = in symbol literals. (#5969, thanks @straight-shoota)
• Allow redefining None to 0 for @[Flags] enum. (#6160, thanks @bew)
• Suggest possible solutions to failing requires. (#5487, thanks @RX14)
• Allow pointers of external C library global variables. (#4845, thanks @larubujo)
• Decouple pretty-printing (pp) and showing the expression (!): p, pp, p!, pp!. (#6044, thanks @asterite)
• Add ivars default value reflection in macros. (#5974, thanks @asterite)
• Add argless overload to Number#round to rounds to the nearest whole number. (#5397, thanks @Sija)
• Add Int#bits_set? to easily check that certain bits are set. (#5619, thanks @RX14)
• Add Float32 and Float64 constants. (#4787, thanks @konovod)
• Add allocated bytes per operation in Benchmark.ips. (#5522, thanks @asterite)
• Add String#to_utf16 and String.from_utf16. (#5541, #5579, #5583 thanks @asterite, @RX14 and @straight-shoota)
• Add String#starts_with?(re: Regex). (#5485, thanks @makenowjust)
• Add Regex.needs_escape?. (#5962, thanks @Sija)
• Add Hash#last_key and Hash#last_value. (#5760, thanks @j8r)
• Add no-copy iteration to Indexable. (#4584, thanks @cjgajard)
• Add Time#at_{beginning,end}_of_second (#6167, thanks @straight-shoota)
• Add IO::Stapled to combine two unidirectional IOs into a single bidirectional one. (#6017, thanks @straight-shoota)
• Add context to errors in JSON.mapping generated code. (#5932, thanks @straight-shoota)
• Add JSON::Serializable and YAML::Serializable attribute powered mappings. (#6082, thanks @kostya)
• Add mode param to File.write. (#5754, thanks @woodruffw)
• Add Punycode/IDNA support and integrate with DNS lookup. (#2543, thanks @makenowjust)
• Add HTTP::Client#options method. (#5824, thanks @mamantoha)
• Add support for Last-Modified and other cache improvements to HTTP::StaticFileHandler. (#2470, #5607, thanks @bebac and @straight-shoota)
• Add operations and improvements related to BigDecimal and BigFloat. (#5437, #5390, #5589, #5582, #5638, #5675, thanks @Sija and @mjago)
• Add BigDecimal and UUID JSON support. (#5525, #5551, thanks @lukeasrodgers and @lachlan)
• Add missing UUID#inspect. (#5574, thanks @ngsankha)
• Add Logger configuration in initializer. (#5618, thanks @Sija)
• Add custom separators in CSV.build. (#5998, #6008 thanks @Sija)
• Add INI.build to emit INI files. (#5298, thanks @j8r)
• Add Process.chroot. (#5577, thanks @chris-huxtable)
• Add Tempfile.tempname to create likely nonexisting filenames. (#5360, thanks @woodruffw)
• Add FileUtils#ln, ln_s, and ln_sf. (#5421, thanks @woodruffw)
• Add support 8bit and true color to Colorize. (#5902, thanks @makenowjust)
• Add comparison operators between classes. (#5645, thanks @asterite)
• Add exception cause in backtrace. (#5833, thanks @RX14)
• Add unhandled exception as argument in at_exit. (#5906, thanks @makenowjust)
• Add support to target aarch64-linux-musl. (#5861, thanks @jirutka)
• Add #clear method to ArrayLiteral/HashLiteral for macros. (#5265, thanks @Sija)
• Add Bool#to_unsafe for C bindings. (#5465, thanks @woodruffw)
• Spec: Add expectations starts_with, ends_with. (#5881, thanks @kostya)
• Formatter: Add --include and --exclude options to restrict directories. (#4635, thanks @straight-shoota)
• Documentation generator: improved navigation, searching, rendering and SEO. (#5229, #5795, #5990, #5657, #6073, thanks @straight-shoota, @Sija and @j8r)
• Playground: Add button in playground to run formatter. (#3652, thanks @samueleaton)

Standard library bugs fixed

• Fixed String#sub handling of negative indexes. (#5491, thanks @makenowjust)
• Fixed String#gsub in non-ascii strings. (#5350, thanks @straight-shoota)
• Fixed String#dump for UTF-8 characters higher than \uFFFF. (#5668, thanks @straight-shoota)
• Fixed String#tr edge case optimization bug. (#5913, thanks @makenowjust)
• Fixed String#rindex when called with Regex. (#5594, thanks @straight-shoota)
• Fixed Time::Span precision loss and boundary check. (#5563, #5786, thanks @petoem and @straight-shoota)
• Array#sample was fixed to use the provided random number generator (instead of the default) in all cases. (#5419, thanks @c910335)
• Add short-circuit logic in Deque#rotate! for singleton and empty queues. (#5399, thanks @willcosgrove)
• Slice#reverse! was optimised to be up to 43% faster. (#5401, thanks @larubujo)
• Fixed Regex#inspect when escaping was needed. (#5841, thanks @makenowjust)
• Fixed JSON.mapping now generates type restriction on getters. (#5935, thanks @Daniel-Worrall)
• Fixed JSON.mapping documentation regarding unions. (#5483, thanks @RX14)
• Fixed JSON.mapping and YAML.mapping to allow properties property. (#5180, #5352, thanks @maxpowa and @Sija)
• Fixed YAML int and float parsing. (#5699, #5774, thanks @straight-shoota)
• Fixed WebSocket handshake validation. (#5327, #6027 thanks @straight-shoota)
• Fixed HTTP::Client is able to use ipv6 addresses. (#6147, thanks @bcardiff)
• Fixed handling some invalid responses in HTTP::Client. (#5630, thanks @straight-shoota)
• Fixed HTTP::ChunkedContent will raise on unterminated content. (#5928, #5943, thanks @straight-shoota)
• URI#to_s now handles default ports for lots of schemes. (#5233, thanks @lachlan)
• HTTP::Cookies is able to deal with spaces in cookies. (#5408, thanks @bararchy)
• Fixed MIME type of SVG images in HTTP::StaticFileHandler. (#5605, thanks @damianham)
• Fixed URI encoding in StaticFileHandler#redirect_to. (#5628, thanks @straight-shoota)
• Fixed before_request callbacks to be executed right before writing the request in HTTP::Client. (#5626, thanks @asterite)
• Dir.glob was re-implemented with performance improvements and edge cases fixed. (#5179, thanks @straight-shoota)
• Fixed File.extname edge case for '.' in path with no extension. (#5790, thanks @codyjb)
• Some ECDHE curves were incorrectly disabled in OpenSSL clients, this has been fixed. (#5494, thanks @jhass)
• Fixed allow bcrypt passwords up to 71 bytes. (#5356, thanks @ysbaddaden)
• Unhandled exceptions occurring inside Process.fork now print their backtrace correctly. (#5431, thanks @RX14)
• Fixed Zip no longer modifies deflate signature. (#5376, thanks @luislavena)
• Fixed INI parser edge cases and performance improvements. (#5442, #5718 thanks @woodruffw, @j8r)
• Fixed initialization of LibXML. (#5587, thanks @lbguilherme)
• Some finalizers were missing for example when the object where cloned. (#5367, thanks @alexbatalov)
• Fixed sigfault handler initialization regarding sa_mask. (#5677 thanks @ysbaddaden)
• Fixed missing reference symbol in ARM. (#5640, thanks @blankoworld)
• Fixed detect llvm 5.0 by llvm-config-5.0 command. (#5531, thanks @Vexatos)
• Restore STDIN|OUT|ERR blocking state on exit. (#5802, thanks @bew)
• Fixed multiple at_exit handlers chaining. (#5413, thanks @bew)
• Fixed senders were not notified when channels were closed. (#5880, thanks @carlhoerberg)
• Fixed forward unhandled exception to caller in parallel macro. (#5726, thanks @lipanski)
• Fixed Markdown parsing of code fences appearing on the same line. (#5606, thanks @oprypin)
• Fixed OpenSSL bindings to recognize LibreSSL. (#5676, #6062, #5949, #5973 thanks @LVMBDV and @RX14)
• Fixed path value in to UNIXSocket created by UNIXServer. (#5869, thanks @straight-shoota)
• Fixed Object.delegate over setters. (#5964, thanks @straight-shoota)
• Fixed pp will now use the same width on every line. (#5978, thanks @makenowjust)
• Fixes missing stdarg.cr for i686-linux-musl. (#6120, thanks @bcardiff)
• Spec: Fixed junit spec formatter to emit the correct XML. (#5463, thanks @hanneskaeufler)

Compiler bugs fixed

• Fixed enum generated values when a member has value 0. (#5954, thanks @bew)
• Fixed compiler issue when previous compilation was interrupted. (#5585, thanks @asterite)
• Fixed compiler error with an empty ensure block. (#5396, thanks @makenowjust)
• Fixed parsing regex in default arguments. (#5481, thanks @makenowjust)
• Fixed parsing error of regex literal after open parenthesis. (#5453, thanks @makenowjust)
• Fixed parsing of empty array with blank. (#6107, thanks @asterite)
• Static libraries are now found correctly when using the --static compiler flag. (#5385, thanks @jreinert)
• Improve error messages for unterminated literals. (#5409, thanks @straight-shoota)
• Fixed ProcNotation and ProcLiteral introspection in macros. (#5206, thanks @javanut13)
• Cross compilation honors --emit and avoid generating bc_flags in current directory. (#5521, thanks @asterite)
• Fixed compiler error with integer constants as generic arguments. (#5532, thanks @asterite)
• Fixed compiler error with self as base class. (#5534, thanks @asterite)
• Fixed macro expansion when mutating the argument. (#5247, thanks @makenowjust)
• Fixed macro expansion edge cases. (#5680, #5842, #6163, thanks @asterite, @makenowjust and @splattael)
• Fixed macro overload on named args. (#5808, thanks @bew)
• Fixed macro numeric types used in interpreter. (#5972, thanks @straight-shoota)
• Fixed missing debug locations in several places. (#5597, thanks @asterite)
• Fixed missing information in AST nodes needed for macro expansion. (#5454, thanks @makenowjust)
• Fixed multiline error messages in emitted by ASTNode#raise macro method. (#5670, thanks @asterite)
• Fixed nested delimiters and escaped whitespace in string/symbol array literals. (#5667, thanks @straight-shoota)
• Fixed custom array/hash-like literals in nested modules. (#5685, thanks @asterite)
• Fixed usage of static array in C externs. (#5690, thanks @asterite)
• Fixed spawn over expression with receivers. (#5781, thanks @straight-shoota)
• Fixed prevent heredoc inside interpolation. (#5648, thanks @makenowjust)
• Fixed parsing error when a newline follows block arg. (#5737, thanks @bew)
• Fixed parsing error when macro argument is followed by a newline. (#6046, thanks @asterite)
• Fixed compiler error messages wording. (#5887, thanks @r00ster91)
• Fixed recursion issues in method_added macro hook. (#5159, thanks @makenowjust)
• Fixed avoid using type of updated argument for type inference. (#5166, thanks @makenowjust)
• Fixed parsing error message on unbalanced end brace in macros. (#5420, thanks @makenowjust)
• Fixed parsing error message on keywords are used as arguments. (#5930, #6052, thanks @makenowjust and @esse)
• Fixed parsing error message on missing comma for named tuples. (#5981, thanks @makenowjust)
• Fixed missing handling of cond node in visitor. (#6032, thanks @veelenga)
• Fixed cli when --threads has invalid value. (#6039, thanks @r00ster91)
• Fixed private methods can now be called with explicit self receiver. (#6075, thanks @makenowjust)
• Fixed missing some missing rules of initializer in initializers macro methods. (#6077, thanks @asterite)
• Fixed regression bug related to unreachable code. (#6045, thanks @asterite)

Tools bugs fixed

• Several crystal init and template improvements. (#5475, #5355, #4691, #5788, #5644, #6031 thanks @woodruffw, @faustinoaq, @bew, @kostya and @makenowjust)
• Formatter: improve formatting of method call arguments with trailing comments. (#5492, thanks @makenowjust)
• Formatter: fix formatting of multiline statements. (#5234, #5901, #6013 thanks @makenowjust)
• Formatter: fix formatting of multi assignment. (#5452, thanks @makenowjust)
• Formatter: fix formatting of backslash ending statements. (#5194, thanks @asterite)
• Formatter: fix formatting of .[] methods. (#5424, thanks @makenowjust)
• Formatter: fix formatting of statements with comments. (#5655, #5893, #5909, thanks @makenowjust)
• Formatter: fix formatting of nested begin/end. (#5922, thanks @makenowjust)
• Formatter: fix formatting of trailing comma with block calls. (#5855, thanks @makenowjust)
• Formatter: fix formatting of ending expression after heredoc. (#6127, thanks @asterite)
• Documentation generator: references to nested types in markdown are now correctly parsed. (#5308, thanks @straight-shoota)
• Documentation generator: fix leftovers regarding default old doc directory. (#5406, thanks @gloverdonovan)
• Documentation generator: avoid failing on non git directory. (#3700, thanks @makenowjust)
• Crystal::Doc::Highlighter has specs now (#5368, thanks @makenowjust)
• Playground: can now be run with HTTPS. (#5527, thanks @opiation)
• Playground: Pretty-print objects in inspector. (#4601, thanks @jgaskins)

Misc

• The platform-specific parts of File and IO::FileDescriptor were moved to Crystal::System, as part of preparation for the windows port. (#5333, #5553, #5622 thanks @RX14)
• The platform-specific parts of Dir were moved to Crystal::System, as part of preparation for the windows port. (#5447, thanks @RX14)
• Incremental contributions regaring windows support. (#5422, #5524, #5533, #5538, #5539, #5580, #5947 thanks @RX14 and @straight-shoota)
• The build on OpenBSD was fixed. (#5387, thanks @wmoxam)
• Add support for FreeBSD 12 (64-bit inodes). (#5199, thanks @myfreeweb)
• Scripts and makefiles now depend on sh instead of bash for greater portability. (#5468, thanks @j8r)
• Honor LDFLAGS and EXTRA_FLAGS in Makefile. (#5423, #5860, thanks @trofi, @jirutka)
• Improve message on link failure. (#5486, #5603, thanks @RX14 and @waj)
• Improve String#to_json when chars don't need escaping. (#5456, thanks @larubujo)
• Improve Time#add_span when arguments are zero. (#5787, thanks @straight-shoota)
• Improve String#pretty_print to output by splitting newline. (#5750, thanks @makenowjust)
• Add \a escape sequence. (#5864, thanks @r00ster91)
• Several miscellaneous minor code cleanups and refactors. (#5499, #5502, #5507, #5516, #4915, #5526, #5529, #5535, #5537, #5540, #5435, #5520, #5530, #5547, #5543, #5561, #5599, #5493, #5546, #5624, #5701, #5733, #5646, #5729, #5791, #5859, #5882, #5899, #5918, #5896, #5810, #5575, #5785, #5866, #5816, #5945, #5963, #5968, #5977, #6004, #5794, #5858, #6033, #6036, #6079, #6111, #6118, #6141, #6142, #5380, #6071, thanks @chastell, @lachlan, @bew, @RX14, @sdogruyol, @makenowjust, @Sija, @noriyotcp, @asterite, @splattael, @straight-shoota, @r00ster91, @jirutka, @paulcsmith, @rab, @esse, @carlhoerberg, @chris-huxtable, @luislavena)
• Several documentation fixes and additions. (#5425, #5682, #5779, #5576, #5806, #5817, #5873, #5878, #5637, #5885, #5884, #5728, #5917, #5912, #5894, #5933, #5809, #5936, #5908, #5851, #5378, #5914, #5967, #5993, #3482, #5946, #6095, #6117, #6131, #6162, thanks @makenowjust, @straight-shoota, @vendethiel, @bew, @Heaven31415, @marksiemers, @Willamin, @r00ster91, @maiha, @Givralix, @docelic, @CaDs, @esse, @igneus, @masukomi)
• CI housekeeping and including 32 bits automated builds. (#5796, #5804, #5837, #6015, #6165, thanks @bcardiff, @bew and @Sija)
• Sync docs in master to https://crystal-lang.org/api/master. (#5941, thanks @bcardiff)
• Enable the large heap configuration for libgc. (#5839, thanks @RX14)
• Improve Ctrl-C handling of spec. (#5719, thanks @makenowjust)
• Playground: Update to codemirror 5.38.0. (#6166, thanks @bcardiff)

Note: crystal-0.25.0-2.pkg & crystal-0.25.0-2-darwin-x86_64.tar.gz Darwin packages fix a bug with a missing clock_gettime on older MacOS X versions (ie, El Capitan & previous).