[Issue 15490] [REG 2.069] Error variable __nrvoretval cannot be modified at compile time when using -inline

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15490

ag0aep6g at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ag0aep6g at gmail.com

--- Comment #2 from ag0aep6g at gmail.com ---
Reduced:

main.d:
----
module main;

import imp1;
import imp2;

void main()
{
    regex();
    listenTCP();
}
----

imp1.d:
----
module imp1;

import imp2;

void listenTCP()
{
    enum r = regex();
}
----

imp2.d:
----
module imp2;

int regex()
{
    return regexImpl();
}

auto regexImpl()
{
    int r = 0;
    return r;
}
----

`dmd -c main.d` works. `dmd -c -inline main.d` gives:
----
Error: variable __nrvoretval51 cannot be modified at compile time
imp1.d(7):        called from here: regex()
----

This reduction fails with 2.068 and 2.067, too. But it compiles with 2.066.

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