https://issues.dlang.org/show_bug.cgi?id=20278

          Issue ID: 20278
           Summary: ICE: calling std.math.sqrt with int cast to double
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: hsteoh@quickfur.ath.cx

Code:
------
struct S {
        int x,y;
        double f() {
                import std.math : sqrt;
                return sqrt(cast(double)x*x + y);
        }
}
------

Compiler output:
------
dmd: /usr/src/d/dmd/src/dmd/backend/cgcod.d:2489: Assertion
`cast(int)(*e).Ecomsub <= cast(int)(*e).Ecount' failed.
Aborted
------

Expected behaviour: the compiler should either emit an error indicating why the code doesn't compile, or else compile the code successfully. It should not crash with an assertion.

Submitting this as critical because it's an ICE.

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