https://issues.dlang.org/show_bug.cgi?id=12581

          Issue ID: 12581
           Summary: [ICE](statement.c, line 713) with invalid assignment +
                    alias this
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: DMD
          Assignee: nobody@puremagic.com
          Reporter: k.hara.pg@gmail.com

The root cause of the ICE is same with bug 12501 and bug 12574, but the fixing way is a bit different.

struct S
{
    int[3] a;
    alias a this;
}
struct T
{
    S s;
    alias s this;
}
void main()
{
    T x;
    x[] = (undef = 1);
}

---
assert statement.c(713) global.gaggedErrors || global.errors

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