Don't eagerly remove all catches if try body is empty.
Fix Issue 8903 - Bad code for enum array members
remove dependence on MATCHnomatch == 0
fix Issue 11505 - Bad error message: "opAssign [...] is annotated with @disable"
Fix Issue 8365 - Static fixed size array of enums initialization fails
Fix Issue 7472 - Cast from class to basic type not rejected during semantic
Fix Issue 7175 - Zero-length static array .ptr is always null
fix Issue 11554 - `is(T == enum);` produces an error if T is an enum defined with no members
fix Issue 7966 - First template instantiation inside `with` results in `Error 42: Symbol Undefined`

Always use `WithScopeSymbol` to make correct chain of `scopesym->parent`.
More better fix for issue 11376
fix Issue 11525 - Error: 'a[] *= a[]' each element is not a scalar, it is a Complex!double
fix Issue 11596 - Internal error: backend/cgcs.c 351
fix Issue 8117 - Cannot initialize struct member without default constructor
fix Issue 11540 - [ICE] CTFE segfault with try-catch-finally and goto
fix Issue 11479 - template members ignore private attribute in ddoc
[Refactoring] Remove unnecessary DMDV1 ifdef

`Array` struct has `operator[]` in both D1 and D2 code.
Merge pull request #2822 from 9rnsr/fix11540

Issue 11540 - [ICE] CTFE segfault with try-catch-finally and goto
fix Issue 11618 - Internal Compiler Error
Merge pull request #2901 from 9rnsr/fix11618

Issue 11618 - Internal Compiler Error
vcbuild: make output of real nan/inf consistent with dmc compiled dmd