Changelog:
Bugfixes
* Fixed "dbQuote additional escape regression" (#15560)
* Fixed "[ARC] Finalizer with a do notation proc crashes the compiler" (#
15599)
* Fixed "./koch drnim: git checkout ... fails (invalid git hash)" (#15639)
* Fixed "Testament does not check memory leaks with Valgrind" (#15631)
* Fixed "Templates can't be made discardable" (#13609)
* Fixed "Taking a view of var openArray[T] generates broken C" (#15652)
* Fixed "Regression: parsecsv from newGZFileStream" (#12410)
* Fixed "NimVM generic procs that take anonymous tuples gives nil access
error." (#15662)
* Fixed "net.$ is not printing a zero group smaller than the compressed
group" (#15698)
* Fixed "map, mapIt, filter cause a segfault at compile time in a static
block when passed an inline function" (#15363)
* Fixed "const Table losing object variant data at runtime" (#8007)
* Fixed "regression(1.0.2 => 1.0.4) VM register messed up depending on
unrelated context" (#15704)
* Fixed "VM: nil procvar treated as not nil in VM, causing FieldDefect and
further errors" (#15595)
* Fixed "ICE with sequtils + algorithm (mapIt, sortedByIt) + json " (#10456
)
* Fixed "Size of packed enum of byte is 2 byte; if highest value is 0xFF but
should be 1" (#15752)
* Fixed "OrderedTable.== throws error on empty table: unhandled exception:
index out of bounds..." (#15750)
* Fixed "strictFunc: system & is considered to have side effects under arc
mode" (#15756)
* Fixed "JSON parsing fails for integer values greater than BiggestInt.max
" (#15413)
* Fixed "yet another cmpIgnoreStyle bug" (#7686)
* Fixed "1 mod 0 gives NaN with JS backend" (#7127)
* Fixed "Discarding a dom.Node raises a javascript error" (#15638)
* Fixed "Regression: overriding streams.write(T) does not work on 0.19
anymore" (#9091)
* Fixed "Converter is applied to the first parameter of operator instead of
last" (#9165)
* Fixed "Recursion using concepts crashes compiler" (#8012)
* Fixed "Union types in javascript" (#7658)
* Fixed "Ambiguous call error when it's not" (#7416)
* Fixed "Codegen does not like shadowed parameter" (#7374)
* Fixed "incomplete code generation when using a compile time variable at
run time (undeclared identifier)" (#6036)
* Fixed "Compiler doesn't warn when using {.global.} and {.threadvar.} on
JS backend despite it not working" (#11625)
* Fixed "Discarding output with nested for/if statements" (#14227)
* Fixed "regression: docgen drops enum doc comments" (#15702)
* Fixed "regression(1.0): codegen error with locals" (#12682)
* Fixed "[JS] $ on an enum in an if expression causes bad codegen" (#15651)
* Fixed "Error upon conditional declaration inside a template" (#3670)
* Fixed "Compiler crash when a value in enum is converted to the enum itself
" (#15145)
* Fixed "[AssertionDefect] json.to(type) on object with Option[ref object]
field" (#15815)
* Fixed "Crash with const tuple unpacking" (#15717)
* Fixed "JS codegen can produce extreme switch statements with case a of
range" (#8821)
* Fixed "cannot capture result, produces unhelpful eror" (#15594)
* Fixed "Code that work in 1.2.6, but not 1.4.0" (#15804)
* Fixed "C-backend link failure for let with {.global, compileTime.} pragma
" (#12640)
* Fixed "json.to crashes (SIGSEGV) when object attribute is a JsonNode and
the key is not there" (#15835)
* Fixed "Cannot use custom pragmas in ref object" (#8457)
* Fixed "GC_ref on empty string fails with [GCASSERT] incRef: interiorPtr"
(#10307)
* Fixed "VM segmentation faults with swap" (#15463)
* Fixed "$(s: WideCString) changes result to repr on -gc:arc" (#15663)
* Fixed "unittest.check rejects with a type error, code that Nim otherwise
accepts" (#15618)
* Fixed "Type mismatch on init of static[T] object with T being a static[U]
" (#11142)
* Fixed "sizeof array with static N crash in type section" (#12636)
* Fixed "-gc:arc segfaults when returning result from a proc" (#15609)
* Fixed "Error: 'newHttpHeaders' can have side effects" (#15851)
* Fixed "template that overloads [] accessor does not compile" (#8829)
* Fixed "Simple type definition crash" (#12897)
* Fixed "mapIt from sequtils not working in {.push compile_time.} context"
(#12558)
* Fixed "-gc:arc/orc Error: unhandled exception: 'sym' is not accessible
using discriminant 'kind' of type 'TNode' [FieldDefect]" (#15707)
* Fixed "incorrect type inference with static: Error: ordinal type expected
" (#15858)
* Fixed "constructor causes SIGBUS if a destroy is defined" (#14601)
* Fixed "internal error: getTypeDescAux(tyOr) on sink UnionType argument" (
#15825)
* Fixed "Console apps in Windows can rise OSError" (#15874)
* Fixed "nim doc cannot grok IOSelectorsException" (#12471)
* Fixed "Method dispatch silently breaks on non-ref objects" (#4318)
* Fixed "Cannot take the compile-time sizeof Atomic types" (#12726)
* Fixed "Setting subscript index of cstring is allowed and generates bad
code" (#14157)
* Fixed "Compiler crash using if as an expression with a noreturn branch" (
#15909)
* Fixed "docgen fatal: result[0].kind == nkSym [AssertionDefect]" (#15916)
* Fixed "Iterator for sharedlist won't iterate all items." (#15941)
* Fixed "Embedded templates with iterators fails to compile" (#2771)
* Fixed "C++ Atomics in union: ::::::field with constructor not allowed in
anonymous aggregate" ([#13062](https://github.com/nim-lang/Nim/issues/
13062))
* Fixed "memory corruption in tmarshall.nim" (#9754)
* Fixed "JS backend doesn't handle float->int type conversion " (#8404)
* Fixed "The "try except" not work when the "OSError: Too many open files
" error occurs!" (#15925)
* Fixed "lent gives wrong results with -d:release" (#14578)
* Fixed "backticks : Using reserved keywords as identifiers is not
documented" (#15806)
* Fixed "backticks : Using reserved keywords as identifiers is not
documented" (#15806)
* Fixed "backticks : Using reserved keywords as identifiers is not
documented" (#15806)
* Fixed "backticks : Using reserved keywords as identifiers is not
documented" (#15806)
* Fixed "Program SIGSEGV when using '-gc:orc'" (#15753)
* Fixed "Assignment to Option[T] doesn't call destructor on existing
contained value" (#15910)
* Fixed "In for loop _ is accessible" (#15972)
* Fixed "Pragma codegenDecl doesn't work inside iterators" (#6497)
* Fixed "nim js --gc:arc gives bad error: undeclared identifier: '+!'" (#
16033)
* Fixed "create a new function definitions got Internal error: environment
misses:" (#14847)
* Fixed "Nim emits #line 0 C preprocessor directives with -debugger:native,
with ICE in gcc-10" (#15942)
* Fixed "Serializing and deserializing a proc SIGSEV's" (#16022)
* Fixed "Small tutorial error" (#16047)
* Fixed "lent codegen error for c++ (works with c,js,vm)" (#15958)
* Fixed "sink var/var sink both accepted; sink var leads to bad codegen and
strange behavior" (#15671)
* Fixed "tfuturevar fails when activated" (#9695)
* Fixed "db_sqlite: Error: undeclared field: 'untypedLen'" (#16080)
* Fixed "xmlparser removes significant white space" (#14056)
* Fixed "nre.escapeRe is not gcsafe" (#16103)
* Fixed "macros.getImpl still return incorrect AST for Sym "XXX:ObjectType
"" (#16110)
* Fixed ""Error: internal error: genRecordFieldAux" - in the "version-1-4
" branch" (#16069)
* Fixed "Tracking memory leaks under ORC (mostly with async)" (#15076)
* Fixed "Const seq into sink arg: =copy operator not found" (#16120)
* Fixed "Copying of a sink parameter into a variable not allowed" (#16119)
* Fixed "Memleak in AsyncHttpServer with arc/orc" (#16154)
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