[Issue 20830] dmd 2.092.0 crashes during compilation.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20830

moonlightsentinel at disroot.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |moonlightsentinel at disroot.o
                   |                            |rg
           Hardware|x86_64                      |All
           Severity|major                       |regression

--- Comment #1 from moonlightsentinel at disroot.org ---
Reduced test case:

=================================
interface T { }
class D : T, T, T { }
=================================

This is a regression from 2.066.0

Up to      2.065.0: Failure with output:
-----
onlineapp.d(2): Error: class onlineapp.D inherits from duplicate interface T
onlineapp.d(2): Error: class onlineapp.D inherits from duplicate interface T
onlineapp.d(2): Error: class onlineapp.D inherits from duplicate interface T
-----

2.066.0 to 2.078.1: Segfault with output: onlineapp.d(2): Error: class
onlineapp.D inherits from duplicate interface T
Since      2.079.1: Segfault with output: onlineapp.d(2): Error: class
`onlineapp.D` inherits from duplicate interface `T`

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