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digitalmars.D.bugs - [Issue 6420] New: [CTFE] ICE on dereference-assigning to a pointer casted from a literal

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6420

           Summary: [CTFE] ICE on dereference-assigning to a pointer
                    casted from a literal
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: kennytm gmail.com


--- Comment #0 from kennytm gmail.com 2011-07-31 16:10:10 PDT ---
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.)

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parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6420


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


--- Comment #1 from Walter Bright <bugzilla digitalmars.com> 2011-08-22
22:47:51 PDT ---
https://github.com/D-Programming-Language/dmd/commit/563a291a5c7757fca87685909afa37100e3b44f6

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