fix Issue 13417 - segmentation fault when deduce template type
fix Issue 13424 - Initialization of delegate to do-nothing default causes segfault at runtime
Merge pull request #3950 from 9rnsr/fix13417

[REG2.066] Issue 13417 - segmentation fault when deduce template type
Merge pull request #3951 from 9rnsr/fix13424

[REG2.066] Issue 13424 - Initialization of delegate to do-nothing default causes segfault at runtime
Move error-related stuff into its own file and merge with color
Remove un-convertable comment
Do not use octal literals in dmd
Do not rely on implicit conversion of int to bool
Do not rely on implicit narrowing integral conversions
Merge pull request #3955 from yebblies/comment4

[DDMD] Remove un-convertable comment
Merge pull request #3954 from yebblies/impconv

[DDMD] Do not rely on implicit narrowing integral conversions
Merge pull request #3953 from yebblies/impbool

[DDMD] Do not rely on implicit conversion of int to bool
Merge pull request #3931 from yebblies/errors

[refactor] Move error-related stuff into its own file and merge with color
Get rid of Expression::toElem forwarding function
Merge pull request #3959 from yebblies/toElem

Get rid of Expression::toElem forwarding function
Fix Issue 13427 - [REG2.066] cannot inline default argument alloca(...)
Get rid of dt_t from the frontend
Remove all references to IRState from the frontend
Update gluestub
Merge pull request #3952 from yebblies/octal

[DDMD] Do not use octal literals in dmd