Move Issue 7504 test case to runnable/casting.d
fix Issue 10842 - Some integer casts wrongly remove side-effect of the operand
fix Issue 6799 - ICE(type.c) involving AAs and pointers to structs
fix Issue 7254 - ICE(cod3.c) returning strings as static arrays
fix Issue 6107 - ICE(expression.c) when a non-template member named '__ctor' exists in a struct, and the constructor is attempted to be invoked.
fix Issue 8179 - ICE(e2ir.c) with failed fixed size array cast
fix Issue 11197 - Struct with postblit cannot be appended to an AA of arrays
Merge pull request #2643 from 9rnsr/fix11197

[REG2.064a] Issue 11197 - Struct with postblit cannot be appended to an AA of arrays
Merge pull request #2597 from 9rnsr/fix10842

Issue 10842 - Some integer casts wrongly remove side-effect of the operand.
Merge pull request #2638 from WalterBright/fix8179

fix Issue 8179 - ICE(e2ir.c) with failed fixed size array cast
Merge pull request #2636 from WalterBright/fix7254

fix Issue 7254 - ICE(cod3.c) returning strings as static arrays
Merge pull request #2633 from WalterBright/fix6799

fix Issue 6799 - ICE(type.c) involving AAs and pointers to structs
Merge pull request #2631 from WalterBright/fix6107

fix Issue 6107 - ICE(expression.c) when a non-template member named '__c...