Fix Issue 11726 - ICE with ufcs on undefined identifier and opDispatch
use uname -m to determine default MODEL
Merge pull request #2954 from yebblies/issue11726

Issue 11726 - ICE with ufcs on undefined identifier and opDispatch
fix Issue 11727 - Repeated error message with using forward referenced enum as variable
Merge pull request #2844 from yebblies/issue10369

Issue 10369 - Deprecate unordered floating point comparisons
Merge pull request #2956 from 9rnsr/fix11727

[diag] Issue 11727 - Repeated error message with using forward referenced enum as variable
fix comment
Merge pull request #2957 from 9rnsr/refactor_immutable

fix confusing comment
Fixes #11735. Enable printing unicode using pragma msg
Merge pull request #2176 from ibuclaw/emptytry

Don't eagerly remove all catches if try body is empty.
Merge pull request #2873 from WaterBright/match-fix

remove dependence on MATCHnomatch == 0

Conflicts:
	src/expression.c
fix Issue 3903 - Traits compiles as true for an array sum with wrong syntax

Check invalid binary operations of arrays in front-end.
Remove "Array operation ... not implemented" errors from glue layer
Merge pull request #2960 from 9rnsr/fix3903

Issue 3903 - Traits compiles as true for an array sum with wrong syntax
Merge pull request #2959 from yazd/fix-11735

Issue 11735 - pragma(msg, ...) fails to print wstring, dstring
Fix 11745: Private unit tests can not be invoked.
Added unittests for issue 11745.
Merge pull request #2955 from MartinNowak/defaultMODEL

use uname -m to determine default MODEL
fix Issue 11730 - associative array with Nullable!SysTime values: Called `get' on null Nullable!SysTime

When I fixed bug 6178, I internally used `cast(void)exp)` to suppress unexpected "has no side effect" error.

But, `CastExp` always try to resolve alias this of its operand to find most matching type to `void` via `Expression::castTo`. It should be disabled.
Merge pull request #2961 from 9rnsr/fix11730

[REG2.064] Issue 11730 - associative array with Nullable!SysTime values: Called `get' on null Nullable!SysTime