## v0.18.0 - 01/03/2018
### Changes affecting backwards compatibility
#### Breaking changes in the standard library
- The ``[]`` proc for strings now raises an ``IndexError`` exception when
the specified slice is out of bounds. See issue
[#6223](https://github.com/nim-lang/Nim/issues/6223) for more details.
You can use ``substr(str, start, finish)`` to get the old behaviour back,
see [this commit](https://github.com/nim-lang/nimbot/commit/98cc031a27ea89947daa7f0bb536bcf86462941f) for an example.
- ``strutils.split`` and ``strutils.rsplit`` with an empty string and a
separator now returns that empty string.
See issue [#4377](https://github.com/nim-lang/Nim/issues/4377).
- Arrays of char cannot be converted to ``cstring`` anymore, pointers to
arrays of char can! This means ``$`` for arrays can finally exist
in ``system.nim`` and do the right thing. This means ``$myArrayOfChar`` changed
its behaviour! Compile with ``-d:nimNoArrayToString`` to see where to fix your
code.
- `reExtended` is no longer default for the `re` constructor in the `re`
module.
- The behavior of ``$`` has been changed for all standard library collections. The
collection-to-string implementations now perform proper quoting and escaping of
strings and chars.
- `newAsyncSocket` taking an `AsyncFD` now runs `setBlocking(false)` on the
fd.
- ``mod`` and bitwise ``and`` do not produce ``range`` subtypes anymore. This
turned out to be more harmful than helpful and the language is simpler
without this special typing rule.
- ``formatFloat``/``formatBiggestFloat`` now support formatting floats with zero
precision digits. The previous ``precision = 0`` behavior (default formatting)
is now available via ``precision = -1``.
- Moved from stdlib into Nimble packages:
- [``basic2d``](https://github.com/nim-lang/basic2d)
_deprecated: use ``glm``, ``arraymancer``, ``neo``, or another package instead_
- [``basic3d``](https://github.com/nim-lang/basic3d)
_deprecated: use ``glm``, ``arraymancer``, ``neo``, or another package instead_
- [``gentabs``](https://github.com/lcrees/gentabs)
- [``libuv``](https://github.com/lcrees/libuv)
- [``numeric``](https://github.com/lcrees/polynumeric)
- [``poly``](https://github.com/lcrees/polynumeric)
- [``pdcurses``](https://github.com/lcrees/pdcurses)
- [``romans``](https://github.com/lcrees/romans)
- [``libsvm``](https://github.com/nim-lang/libsvm_legacy)
- [``joyent_http_parser``](https://github.com/nim-lang/joyent_http_parser)
- Proc [toCountTable](https://nim-lang.org/docs/tables.html#toCountTable,openArray[A])
now produces a `CountTable` with values correspoding to the number of occurrences
of the key in the input. It used to produce a table with all values set to `1`.
Counting occurrences in a sequence used to be:
```nim
let mySeq = @[1, 2, 1, 3, 1, 4]
var myCounter = initCountTable[int]()
for item in mySeq:
myCounter.inc item
```
Now, you can simply do:
```nim
let
mySeq = @[1, 2, 1, 3, 1, 4]
myCounter = mySeq.toCountTable()
```
- If you use ``--dynlibOverride:ssl`` with OpenSSL 1.0.x, you now have to
define ``openssl10`` symbol (``-d:openssl10``). By default OpenSSL 1.1.x is
assumed.
- ``newNativeSocket`` is now named ``createNativeSocket``.
- ``newAsyncNativeSocket`` is now named ``createAsyncNativeSocket``
and it no longer raises an OS error but returns an ``osInvalidSocket`` when
creation fails.
- The ``securehash`` module is now deprecated. Instead import ``std / sha1``.
- The ``readPasswordFromStdin`` proc has been moved from the ``rdstdin``
to the ``terminal`` module, thus it does not depend on linenoise anymore.
#### Breaking changes in the compiler
- ``\n`` is now only the single line feed character like in most
other programming languages. The new platform specific newline escape sequence is
written as ``\p``. This change only affects the Windows platform.
- The overloading rules changed slightly so that constrained generics are
preferred over unconstrained generics. (Bug #6526)
- We changed how array accesses "from backwards" like ``a[^1]`` or ``a[0..^1]`` are
implemented. These are now implemented purely in ``system.nim`` without compiler
support. There is a new "heterogeneous" slice type ``system.HSlice`` that takes 2
generic parameters which can be ``BackwardsIndex`` indices. ``BackwardsIndex`` is
produced by ``system.^``.
This means if you overload ``[]`` or ``[]=`` you need to ensure they also work
with ``system.BackwardsIndex`` (if applicable for the accessors).
- The parsing rules of ``if`` expressions were changed so that multiple
statements are allowed in the branches. We found few code examples that
now fail because of this change, but here is one:
```nim
t[ti] = if exp_negative: '-' else: '+'; inc(ti)
```
This now needs to be written as:
```nim
t[ti] = (if exp_negative: '-' else: '+'); inc(ti)
```
- The experimental overloading of the dot ``.`` operators now take
an ``untyped``` parameter as the field name, it used to be
a ``static[string]``. You can use ``when defined(nimNewDot)`` to make
your code work with both old and new Nim versions.
See [special-operators](https://nim-lang.org/docs/manual.html#special-operators)
for more information.
- ``yield`` (or ``await`` which is mapped to ``yield``) never worked reliably
in an array, seq or object constructor and is now prevented at compile-time.
### Library additions
- **Added ``sequtils.mapLiterals`` for easier construction of array and tuple literals.**
- Added ``system.runnableExamples`` to make examples in Nim's documentation easier
to write and test. The examples are tested as the last step of
``nim doc``.
- Implemented ``getIoHandler`` proc in the ``asyncdispatch`` module that allows
you to retrieve the underlying IO Completion Port or ``Selector[AsyncData]``
object in the specified dispatcher.
- For string formatting / interpolation a new module
called [strformat](https://nim-lang.org/docs/strformat.html) has been added
to the stdlib.
- The `ReadyKey` type in the selectors module now contains an ``errorCode``
field to help distinguish between ``Event.Error`` events.
- Implemented an `accept` proc that works on a `SocketHandle` in
``nativesockets``.
- Added ``algorithm.rotateLeft``.
- Added ``typetraits.$`` as an alias for ``typetraits.name``.
- Added ``system.getStackTraceEntries`` that allows you to access the stack
trace in a structured manner without string parsing.
- Added ``parseutils.parseSaturatedNatural``.
- Added ``macros.unpackVarargs``.
- Added support for asynchronous programming for the JavaScript backend using
the `asyncjs` module.
- Added true color support for some terminals. Example:
```nim
import colors, terminal
const Nim = "Efficient and expressive programming."
var
fg = colYellow
bg = colBlue
int = 1.0
enableTrueColors()
for i in 1..15:
styledEcho bgColor, bg, fgColor, fg, Nim, resetStyle
int -= 0.01
fg = intensity(fg, int)
setForegroundColor colRed
setBackgroundColor colGreen
styledEcho "Red on Green.", resetStyle
```
### Library changes
- ``echo`` now works with strings that contain ``\0`` (the binary zero is not
shown) and ``nil`` strings are equal to empty strings.
- JSON: Deprecated `getBVal`, `getFNum`, and `getNum` in favour of
`getBool`, `getFloat`, `getBiggestInt`. A new `getInt` procedure was also
added.
- ``rationals.toRational`` now uses an algorithm based on continued fractions.
This means its results are more precise and it can't run into an infinite loop
anymore.
- ``os.getEnv`` now takes an optional ``default`` parameter that tells ``getEnv``
what to return if the environment variable does not exist.
- The ``random`` procs in ``random.nim`` have all been deprecated. Instead use
the new ``rand`` procs. The module now exports the state of the random
number generator as type ``Rand`` so multiple threads can easily use their
own random number generators that do not require locking. For more information
about this rename see issue [#6934](https://github.com/nim-lang/Nim/issues/6934)
- ``writeStackTrace`` is now proclaimed to have no IO effect (even though it does)
so that it is more useful for debugging purposes.
- ``db_mysql`` module: ``DbConn`` is now a ``distinct`` type that doesn't expose the
details of the underlying ``PMySQL`` type.
- ``parseopt2`` is now deprecated, use ``parseopt`` instead.
### Language additions
- It is now possible to forward declare object types so that mutually
recursive types can be created across module boundaries. See
[package level objects](https://nim-lang.org/docs/manual.html#package-level-objects)
for more information.
- Added support for casting between integers of same bitsize in VM (compile time and nimscript).
This allows to, among other things, reinterpret signed integers as unsigned.
- Custom pragmas are now supported using pragma ``pragma``, please see language
manual for details.
- Standard library modules can now also be imported via the ``std`` pseudo-directory.
This is useful in order to distinguish between standard library and nimble package
imports:
```nim
import std / [strutils, os, osproc]
import someNimblePackage / [strutils, os]
```
### Language changes
- The **unary** ``<`` is now deprecated, for ``.. <`` use ``..<`` for other usages
use the ``pred`` proc.
- Bodies of ``for`` loops now get their own scope:
```nim
# now compiles:
for i in 0..4:
let i = i + 1
echo i
```
- To make Nim even more robust the system iterators ``..`` and ``countup``
now only accept a single generic type ``T``. This means the following code
doesn't die with an "out of range" error anymore:
```nim
var b = 5.Natural
var a = -5
for i in a..b:
echo i
```
- ``atomic`` and ``generic`` are no longer keywords in Nim. ``generic`` used to be
an alias for ``concept``, ``atomic`` was not used for anything.
- The memory manager now uses a variant of the TLSF algorithm that has much
better memory fragmentation behaviour. According
to [http://www.gii.upv.es/tlsf/](http://www.gii.upv.es/tlsf/) the maximum
fragmentation measured is lower than 25%. As a nice bonus ``alloc`` and
``dealloc`` became O(1) operations.
- The compiler is now more consistent in its treatment of ambiguous symbols:
Types that shadow procs and vice versa are marked as ambiguous (bug #6693).
- codegenDecl pragma now works for the JavaScript backend. It returns an empty
string for function return type placeholders.
- Extra semantic checks for procs with noreturn pragma: return type is not allowed,
statements after call to noreturn procs are no longer allowed.
- Noreturn proc calls and raising exceptions branches are now skipped during common type
deduction in ``if`` and ``case`` expressions. The following code snippets now compile:
```nim
import strutils
let str = "Y"
let a = case str:
of "Y": true
of "N": false
else: raise newException(ValueError, "Invalid boolean")
let b = case str:
of nil, "": raise newException(ValueError, "Invalid boolean")
elif str.startsWith("Y"): true
elif str.startsWith("N"): false
else: false
let c = if str == "Y": true
elif str == "N": false
else:
echo "invalid bool"
quit("this is the end")
```
- Pragmas now support call syntax, for example: ``{.exportc"myname".}`` and
``{.exportc("myname").}``
- The ``deprecated`` pragma now supports a user-definable warning message for procs.
```nim
proc bar {.deprecated: "use foo instead".} =
return
bar()
```
### Tool changes
- The ``nim doc`` command is now an alias for ``nim doc2``, the second version of
the documentation generator. The old version 1 can still be accessed
via the new ``nim doc0`` command.
- Nim's ``rst2html`` command now supports the testing of code snippets via an RST
extension that we called ``:test:``::
```rst
.. code-block:: nim
:test:
# shows how the 'if' statement works
if true: echo "yes"
```
### Compiler changes
### Bugfixes
- Fixed "ReraiseError when using try/except within finally block"
([#5871](https://github.com/nim-lang/Nim/issues/5871))
- Fixed "Range type inference leads to counter-intuitive behvaiour"
([#5854](https://github.com/nim-lang/Nim/issues/5854))
- Fixed "JSON % operator can fail in extern procs with dynamic types"
([#6385](https://github.com/nim-lang/Nim/issues/6385))
- Fixed ""intVal is not accessible" in VM"
([#6083](https://github.com/nim-lang/Nim/issues/6083))
- Fixed "Add excl for OrderedSet"
([#2467](https://github.com/nim-lang/Nim/issues/2467))
- Fixed "newSeqOfCap actually doesn't reserve memory"
([#6403](https://github.com/nim-lang/Nim/issues/6403))
- Fixed "[Regression] Nim segfaults"
([#6435](https://github.com/nim-lang/Nim/issues/6435))
- Fixed "Seq assignment is slower than expected"
([#6433](https://github.com/nim-lang/Nim/issues/6433))
- Fixed "json module issues with empty dicts and lists"
([#6438](https://github.com/nim-lang/Nim/issues/6438))
- Fixed "mingw installed via finish.exe fails to link if Nim located in path with whitespace"
([#6452](https://github.com/nim-lang/Nim/issues/6452))
- Fixed "unittest.check does not perform short-circuit evaluation"
([#5784](https://github.com/nim-lang/Nim/issues/5784))
- Fixed "Error while concatenating an array of chars."
([#5861](https://github.com/nim-lang/Nim/issues/5861))
- Fixed "range initialization: [ProveInit] hint: Cannot prove that"
([#6474](https://github.com/nim-lang/Nim/issues/6474))
- Fixed "scanf can call procs with side-effects multiple times"
([#6487](https://github.com/nim-lang/Nim/issues/6487))
- Fixed "gcsafe detection problem"
([#5620](https://github.com/nim-lang/Nim/issues/5620))
- Fixed "C++ codegen: `mitems` generates invalid code."
([#4910](https://github.com/nim-lang/Nim/issues/4910))
- Fixed "strange runtime behavior on macOS"
([#6496](https://github.com/nim-lang/Nim/issues/6496))
- Fixed "stdtmpl: invalid indentation after a line ending in question mark"
([#5070](https://github.com/nim-lang/Nim/issues/5070))
- Fixed "Windows: NAN troubles on c backend"
([#6511](https://github.com/nim-lang/Nim/issues/6511))
- Fixed "lib/nim/system/cellsets.nim(33, 31) Error: type mismatch while attempting to compile for 16bit CPUs"
([#3558](https://github.com/nim-lang/Nim/issues/3558))
- Fixed "Can't compile dynlib with ``-d:useNimRtl`` and ``--threads:on``"
([#5143](https://github.com/nim-lang/Nim/issues/5143))
- Fixed "var s = @[0,1,2,...] can generate thousand of single assignments in C code"
([#5007](https://github.com/nim-lang/Nim/issues/5007))
- Fixed "`echo` discards everything after a null character"
([#1137](https://github.com/nim-lang/Nim/issues/1137))
- Fixed "Turn off reExtended by default"
([#5627](https://github.com/nim-lang/Nim/issues/5627))
- Fixed "Bad Links in docs/backends.html"
([#5914](https://github.com/nim-lang/Nim/issues/5914))
- Fixed "Index out of bounds error in db_postgres when executing non parameter-substituted queries containing "?""
([#6571](https://github.com/nim-lang/Nim/issues/6571))
- Fixed "Please add pipe2 support to posix stdlib"
([#6553](https://github.com/nim-lang/Nim/issues/6553))
- Fixed "Return semantics vary depending on return style"
([#6422](https://github.com/nim-lang/Nim/issues/6422))
- Fixed "parsecsv.open reports SIGSEGV when calling 'open' on missing file"
([#6148](https://github.com/nim-lang/Nim/issues/6148))
- Fixed "VCC: Nim generates non-compilable code for system.nim"
([#6606](https://github.com/nim-lang/Nim/issues/6606))
- Fixed "Generic subtype matches worse than a generic"
([#6526](https://github.com/nim-lang/Nim/issues/6526))
- Fixed "formatFloat inconsistent scientific notation"
([#6589](https://github.com/nim-lang/Nim/issues/6589))
- Fixed "Generated c code calls function twice"
([#6292](https://github.com/nim-lang/Nim/issues/6292))
- Fixed "Range type inference leads to counter-intuitive behvaiour"
([#5854](https://github.com/nim-lang/Nim/issues/5854))
- Fixed "New backward indexing is too limited"
([#6631](https://github.com/nim-lang/Nim/issues/6631))
- Fixed "Table usage in a macro (SIGSEGV: Illegal storage access.)"
([#1860](https://github.com/nim-lang/Nim/issues/1860))
- Fixed "Incorrect deprecation error"
([#6634](https://github.com/nim-lang/Nim/issues/6634))
- Fixed "Wrong indices in arrays not starting with 0"
([#6675](https://github.com/nim-lang/Nim/issues/6675))
- Fixed "if expressions"
([#6609](https://github.com/nim-lang/Nim/issues/6609))
- Fixed "BackwardsIndex: converter + `[]` + unrelated type[^1]: lib/system.nim(3536, 3) Error"
([#6692](https://github.com/nim-lang/Nim/issues/6692))
- Fixed "BackwardsIndex: converter + `[]` + unrelated type[^1]: lib/system.nim(3536, 3) Error"
([#6692](https://github.com/nim-lang/Nim/issues/6692))
- Fixed "js backend 0.17.3: array bounds check for non zero based arrays is buggy"
([#6532](https://github.com/nim-lang/Nim/issues/6532))
- Fixed "HttpClient's new API doesn't work through a proxy for https URLs"
([#6685](https://github.com/nim-lang/Nim/issues/6685))
- Fixed "isServing isn't declared and isn't compiling"
([#6707](https://github.com/nim-lang/Nim/issues/6707))
- Fixed "[Regression] value out of range"
([#6710](https://github.com/nim-lang/Nim/issues/6710))
- Fixed "Error when using `multisync` macro"
([#6708](https://github.com/nim-lang/Nim/issues/6708))
- Fixed "formatFloat inconsistent scientific notation"
([#6589](https://github.com/nim-lang/Nim/issues/6589))
- Fixed "Using : (constructor arguments) for passing values to functions with default arguments causes a compiler crash."
([#6765](https://github.com/nim-lang/Nim/issues/6765))
- Fixed "In-place object initialization leads to vcc incompatible code"
([#6757](https://github.com/nim-lang/Nim/issues/6757))
- Fixed "Improve parseCookies doc"
([#5721](https://github.com/nim-lang/Nim/issues/5721))
- Fixed "Parser regression with nested do notation inside conditional"
([#6166](https://github.com/nim-lang/Nim/issues/6166))
- Fixed "Request for better error message"
([#6776](https://github.com/nim-lang/Nim/issues/6776))
- Fixed "Testament tester does not execute test with `exitcode` only"
([#6775](https://github.com/nim-lang/Nim/issues/6775))
- Fixed "JS integer division off by one"
([#6753](https://github.com/nim-lang/Nim/issues/6753))
- Fixed "Regression: cannot prove not nil"
([#5781](https://github.com/nim-lang/Nim/issues/5781))
- Fixed "SIGSEGV: Illegal storage access. (Attempt to read from nil?) in generic proc"
([#6073](https://github.com/nim-lang/Nim/issues/6073))
- Fixed "Request for better error message"
([#6776](https://github.com/nim-lang/Nim/issues/6776))
- Fixed "Nim #head: sorting via reference hangs compiler"
([#6724](https://github.com/nim-lang/Nim/issues/6724))
- Fixed "Cannot cast pointer to char in cpp"
([#5979](https://github.com/nim-lang/Nim/issues/5979))
- Fixed "asynchttpserver replies with several errors on single request"
([#6386](https://github.com/nim-lang/Nim/issues/6386))
- Fixed "object variants superclass trigger bad codegen"
([#5521](https://github.com/nim-lang/Nim/issues/5521))
- Fixed "JS integer division off by one"
([#6753](https://github.com/nim-lang/Nim/issues/6753))
- Fixed "js backend compiler crash with tables indexed by certain types"
([#6568](https://github.com/nim-lang/Nim/issues/6568))
- Fixed "Jsgen bug with is"
([#6445](https://github.com/nim-lang/Nim/issues/6445))
- Fixed "Subrange definition with ..<"
([#6788](https://github.com/nim-lang/Nim/issues/6788))
- Fixed "fields not initialized: array with enum index type as object field."
([#6682](https://github.com/nim-lang/Nim/issues/6682))
- Fixed "Can not delete data in table when table's data type is kind of "not nil""
([#6555](https://github.com/nim-lang/Nim/issues/6555))
- Fixed "tables.nim: Cannot prove that 'n' is initialized"
([#6121](https://github.com/nim-lang/Nim/issues/6121))
- Fixed "issues with 'not nil' applied to a closure proc"
([#6489](https://github.com/nim-lang/Nim/issues/6489))
- Fixed "`not nil` not working in some cases"
([#4686](https://github.com/nim-lang/Nim/issues/4686))
- Fixed "Cannot prove '@[v]' is not nil"
([#3993](https://github.com/nim-lang/Nim/issues/3993))
- Fixed "Feature: support TCP_NODELAY in net.sockets"
([#6795](https://github.com/nim-lang/Nim/issues/6795))
- Fixed "Code that makes the compiler throw an error message and then hangs"
([#6820](https://github.com/nim-lang/Nim/issues/6820))
- Fixed "Code that makes the compiler throw an error message and then hangs"
([#6820](https://github.com/nim-lang/Nim/issues/6820))
- Fixed "Inconsistent behavior with sequence and string slicing"
([#6223](https://github.com/nim-lang/Nim/issues/6223))
- Fixed "Wrong behavior of "split" (proc and iterator)"
([#4377](https://github.com/nim-lang/Nim/issues/4377))
- Fixed "[Documentation] Invalid module name: [foo, bar]"
([#6831](https://github.com/nim-lang/Nim/issues/6831))
- Fixed "The destructor is not called for temporary objects"
([#4214](https://github.com/nim-lang/Nim/issues/4214))
- Fixed "Destructors does not work with implicit items iterator in for loop"
([#985](https://github.com/nim-lang/Nim/issues/985))
- Fixed "Error in template when using the type of the parameter inside it"
([#6756](https://github.com/nim-lang/Nim/issues/6756))
- Fixed "should json.to() respect parent attributes?"
([#5856](https://github.com/nim-lang/Nim/issues/5856))
- Fixed "json 'to' macro can not marshalize into tuples"
([#6095](https://github.com/nim-lang/Nim/issues/6095))
- Fixed "json.to fails with seq[T]"
([#6604](https://github.com/nim-lang/Nim/issues/6604))
- Fixed "json.to() is not worth using compared to marshal.to[T]"
([#5848](https://github.com/nim-lang/Nim/issues/5848))
- Fixed "Memory not being released in time, running out of memory"
([#6031](https://github.com/nim-lang/Nim/issues/6031))
- Fixed "[Regression] Bad C codegen for generic code"
([#6889](https://github.com/nim-lang/Nim/issues/6889))
- Fixed "rollingFileLogger deletes file on every start."
([#6264](https://github.com/nim-lang/Nim/issues/6264))
- Fixed "Remove/deprecate securehash module."
([#6033](https://github.com/nim-lang/Nim/issues/6033))
- Fixed "[bug or not] object construction for seq[T] failed without space after colon"
([#5999](https://github.com/nim-lang/Nim/issues/5999))
- Fixed "issues with the random module"
([#4726](https://github.com/nim-lang/Nim/issues/4726))
- Fixed "Reassigning local var to seq of objects results in nil element in Object's seq field"
([#668](https://github.com/nim-lang/Nim/issues/668))
- Fixed "Compilation error with "newseq[string]""
([#6726](https://github.com/nim-lang/Nim/issues/6726))
- Fixed "await inside array/dict literal produces invalid code - Part 2"
([#6626](https://github.com/nim-lang/Nim/issues/6626))
- Fixed "terminal.eraseline() gives OverflowError on Windows"
([#6931](https://github.com/nim-lang/Nim/issues/6931))
- Fixed "[Regression] `sequtils.any` conflicts with `system.any`"
([#6932](https://github.com/nim-lang/Nim/issues/6932))
- Fixed "C++ codegen: `mitems` generates invalid code."
([#4910](https://github.com/nim-lang/Nim/issues/4910))
- Fixed "seq.mitems produces invalid cpp codegen"
([#6892](https://github.com/nim-lang/Nim/issues/6892))
- Fixed "Concepts regression"
([#6108](https://github.com/nim-lang/Nim/issues/6108))
- Fixed "Generic iterable concept with array crashes compiler"
([#6277](https://github.com/nim-lang/Nim/issues/6277))
- Fixed "C code generation "‘a’ is a pointer; did you mean to use ‘->’?""
([#6462](https://github.com/nim-lang/Nim/issues/6462))
- Fixed "`--NimblePath` fails if a `-` in path which is not followed by a number"
([#6949](https://github.com/nim-lang/Nim/issues/6949))
- Fixed ""not registered in the selector" in asyncfile.close() for something that clearly was registered"
([#6906](https://github.com/nim-lang/Nim/issues/6906))
- Fixed "strange frexp behavior"
([#6353](https://github.com/nim-lang/Nim/issues/6353))
- Fixed "noreturn branches of case statements shouldn't contribute to type"
([#6885](https://github.com/nim-lang/Nim/issues/6885))
- Fixed "Type inference for 'if' statements changed"
([#6980](https://github.com/nim-lang/Nim/issues/6980))
- Fixed "newest asyncdispatch recursion"
([#6100](https://github.com/nim-lang/Nim/issues/6100))
- Fixed "Ambiguous identifier between set type and proc"
([#6965](https://github.com/nim-lang/Nim/issues/6965))
- Fixed "Inconsistent behavior with sequence and string slicing"
([#6223](https://github.com/nim-lang/Nim/issues/6223))
- Fixed "Unsupported OpenSSL library imported dynamically"
([#5000](https://github.com/nim-lang/Nim/issues/5000))
- Fixed "`nim check` segfaults"
([#6972](https://github.com/nim-lang/Nim/issues/6972))
- Fixed "GC deadlock"
([#6988](https://github.com/nim-lang/Nim/issues/6988))
- Fixed "Create a seq without memory initialization"
([#6401](https://github.com/nim-lang/Nim/issues/6401))
- Fixed "Fix bug for getch on Windows while using the arrow keys"
([#6966](https://github.com/nim-lang/Nim/issues/6966))
- Fixed "runnableExamples doesn't work in templates"
([#7018](https://github.com/nim-lang/Nim/issues/7018))
- Fixed "runnableExamples doesn't work with untyped statement blocks"
([#7019](https://github.com/nim-lang/Nim/issues/7019))
- Fixed "Critical bug in parseBiggestFloat"
([#7060](https://github.com/nim-lang/Nim/issues/7060))
- Fixed "[RFC] strformat.% should be gone"
([#7078](https://github.com/nim-lang/Nim/issues/7078))
- Fixed "compiler crash on simple macro"
([#7093](https://github.com/nim-lang/Nim/issues/7093))
- Fixed "Make newlines sane again"
([#7089](https://github.com/nim-lang/Nim/issues/7089))
- Fixed "JS - Unicode enum string representation issue"
([#6741](https://github.com/nim-lang/Nim/issues/6741))
- Fixed "Strange behaviour of 0.17.3 (working ok in 0.17.2)"
([#6989](https://github.com/nim-lang/Nim/issues/6989))
- Fixed "Strange behaviour of 0.17.3 (working ok in 0.17.2)"
([#6989](https://github.com/nim-lang/Nim/issues/6989))
- Fixed "Compiler crash: try expression with infix as"
([#7116](https://github.com/nim-lang/Nim/issues/7116))
- Fixed "nimsuggest crash"
([#7140](https://github.com/nim-lang/Nim/issues/7140))
- Fixed "[RFC] Reintroduce readChar"
([#7072](https://github.com/nim-lang/Nim/issues/7072))
- Fixed "Copyright line needs updating"
([#7129](https://github.com/nim-lang/Nim/issues/7129))
- Fixed "-0.0 doesn't result in negative zero in VM"
([#7079](https://github.com/nim-lang/Nim/issues/7079))
- Fixed "Windows large filesize"
([#7121](https://github.com/nim-lang/Nim/issues/7121))
- Fixed "Securehash is not parsimonious with MD5 and other hash modules"
([#6961](https://github.com/nim-lang/Nim/issues/6961))
- Fixed "os.findExe() shouldn't look in current directory on posix, unless exe has a /"
([#6939](https://github.com/nim-lang/Nim/issues/6939))
- Fixed "`compiles(...)` with `fatal` pragma causes compiler to exit early"
([#7080](https://github.com/nim-lang/Nim/issues/7080))
- Fixed "NPE when compile macro that returns concrete value"
([#5450](https://github.com/nim-lang/Nim/issues/5450))
- Fixed "Using a variable of type `int | float` causes internal compiler error"
([#6946](https://github.com/nim-lang/Nim/issues/6946))
- Fixed "Unsigned integers could not be used as array indexes."
([#7153](https://github.com/nim-lang/Nim/issues/7153))
- Fixed "countdown with uint causes underflow"
([#4220](https://github.com/nim-lang/Nim/issues/4220))
- Fixed "Inconsistent method call syntax"
([#7200](https://github.com/nim-lang/Nim/issues/7200))
- Fixed "Impossible to create an empty const array"
([#6853](https://github.com/nim-lang/Nim/issues/6853))
- Fixed "Strange UINT handling"
([#3985](https://github.com/nim-lang/Nim/issues/3985))
- Fixed "Bad codegen when passing arg that is part of return value destination"
([#6960](https://github.com/nim-lang/Nim/issues/6960))
- Fixed "No info about gcsafety in error message when global var is accessed in async proc"
([#6186](https://github.com/nim-lang/Nim/issues/6186))
- Fixed "Resolving package vs. local import ambiguities"
([#2819](https://github.com/nim-lang/Nim/issues/2819))
- Fixed "Internal error with type() operator"
([#3711](https://github.com/nim-lang/Nim/issues/3711))
- Fixed "newAsyncSocket should raise an OS error plus other inconsistencies"
([#4995](https://github.com/nim-lang/Nim/issues/4995))
- Fixed "mapLiterals fails with negative values"
([#7215](https://github.com/nim-lang/Nim/issues/7215))
- Fixed "fmWrite doesn't truncate file with openAsync, unlike open()"
([#5531](https://github.com/nim-lang/Nim/issues/5531))
- Fixed "Move libsvm to an external nimble module"
([#5786](https://github.com/nim-lang/Nim/issues/5786))
- Fixed "Prevent acceptAddr gotcha with newSocket"
([#7227](https://github.com/nim-lang/Nim/issues/7227))
- Fixed "strtabs.getOrDefault is inconsistent with tables.getOrDefault"
([#4265](https://github.com/nim-lang/Nim/issues/4265))
- Fixed "Code falling through into exception handler when no exception thrown."
([#7232](https://github.com/nim-lang/Nim/issues/7232))
- Fixed "the new generic inference rules are broken"
([#7247](https://github.com/nim-lang/Nim/issues/7247))
- Fixed "Odd `..<` regression"
([#6992](https://github.com/nim-lang/Nim/issues/6992))
- Fixed "Different proc type inferred from default parameter"
([#4659](https://github.com/nim-lang/Nim/issues/4659))
- Fixed "Different proc type inferred from default parameter"
([#4659](https://github.com/nim-lang/Nim/issues/4659))
- Fixed "Testament sometimes ignores test failures"
([#7236](https://github.com/nim-lang/Nim/issues/7236))
- Fixed "New Allocator Fails On >=4GB Requests"
([#7120](https://github.com/nim-lang/Nim/issues/7120))
- Fixed "User pragmas hide effect specifications from sempass2"
([#7216](https://github.com/nim-lang/Nim/issues/7216))
- Fixed "C++: SIGABRT instead of IndexError for out-of-bounds"
([#6512](https://github.com/nim-lang/Nim/issues/6512))
- Fixed "An uncaught exception in cpp mode doesn't show the exception name/msg"
([#6431](https://github.com/nim-lang/Nim/issues/6431))