[Issue 10063] New: inout+pure results in ability to produce immutable reference to mutable data

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10063

           Summary: inout+pure results in ability to produce immutable
                    reference to mutable data
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: accepts-invalid
          Severity: critical
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: verylonglogin.reg at gmail.com


--- Comment #0 from Denis Shelomovskij <verylonglogin.reg at gmail.com> 2013-05-11 05:12:50 MSD ---
This code compiles but shouldn't:
---
inout(void)* f(inout void* p) pure
{ return p; }

immutable(void)* g(inout int* p) pure
{ return f(p); }
---

Explicit or implicit cast is required for this issue to appear. Change `g` to
accept `void*` instead of `int*` to see expected compilation error.

Another test-case:
---
struct S
{
    uint* p;

    inout(void)* f() pure inout
    { return p; }

    immutable(void)* g() pure inout
    { return f(); }
}
---

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