[Issue 4751] Regression(1.062, 2.047) ICE(constfold.c) >> after error

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4751


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch
            Summary|fail_compilation/fail37.d   |Regression(1.062, 2.047)
                   |hits an assert in constfold |ICE(constfold.c) >> after
                   |                            |error


--- Comment #1 from Don <clugdbug at yahoo.com.au> 2010-08-31 00:41:06 PDT ---
Reduced test case:

ulong [undefined>>1]   hexarray;
ulong [undefined>>>1]   hexarray2;

It doesn't fail with [undefined<<1]

This is caused by the error propagation introduced in 2.047. 

PATCH constfold.c, Shr(), line 589

        case Tuns64:
                value = (d_uns64)(value) >> count;
                break;

+        case Terror:
+            return e1;

        default:
                assert(0);
    }

And exactly the same for UShr() line 630.

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