Summary: [CTFE] Problem with opAssign call in foreach(ref)
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD

--- Comment #0 from 2011-08-17 11:14:58 PDT ---
Reduced code (Foo originally was BigInt):

struct Foo {
    bool b = false;
    void opAssign(int x) {
        this.b = true;
int foo() {
    Foo[1] array;
    foreach (ref item; array)
        item = 1;
    return 0;
enum r = foo(); // error
void main() {
//    const r = foo(); // OK

DMD 2.055beta gives:

test.d(9): Error: variable __key4 is used before initialization
test.d(10): Error: cannot evaluate item.opAssign(1) at compile time
test.d(13): Error: cannot evaluate foo() at compile time

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