[Issue 24169] Confusion between array literal and associative array literal

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24169

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
The fault appears to lie with init.ArrayInitializer.isAssociativeArray(), which
is way too eager to conclude it's an associative array.

I suggest that it be amended to require, for an associative array:

1. all keys are present

2. the key type is not integrably promotable to size_t

    -or-

the range of key values is more than twice the number of entries

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