Bug 6420 – [CTFE] ICE on dereference-assigning to a pointer casted from a literal

Test case: -------------- static assert( { *cast(int*)45 = 1; return true; }() ); -------------- CTFE internal error: unsupported assignment *45 = 1 Assertion failed: (e1->op == TOKarraylength || e1->op == TOKvar || e1->op == TOKdotvar || e1->op == TOKindex || e1->op == TOKslice), function interpretAssignCommon, file interpret.c, line 3072. Abort trap: 6 -------------- The compiler should just fail to compile instead of ICE-ing. The number literal 45 can be replaced by a string literal and it still ICE. Test case 2: ----------------------- static assert( { auto k = cast(int*)45; *k = 1; return true; }() ); ----------------------- x.d(2): Error: CTFE internal error: illegal pointer value cast(int*)45u Assertion failed: (isStackValueValid(newval)), function createStackValue, file interpret.c, line 5165. ----------------------- Test case 3: ----------------------- static assert( { *cast(float*)"a" = 4.0; return true; }() ); ----------------------- CTFE internal error: unsupported assignment *cast(float*)"a" = 4F Assertion failed: (e1->op == TOKarraylength || e1->op == TOKvar || e1->op == TOKdotvar || e1->op == TOKindex || e1->op == TOKslice), function interpretAssignCommon, file interpret.c, line 3072. Abort trap: 6 ----------------------- (All test cases should *fail* to compile.)