cannot call impure function

[Michael]

On Sunday, 4 October 2020 at 17:05:33 UTC, Michael wrote:
> On Sunday, 4 October 2020 at 17:01:44 UTC, Paul Backus wrote:
>> On Sunday, 4 October 2020 at 16:48:24 UTC, Michael wrote:
>>> Dear all,
>>>
>>> Sorry for the potentially stupid question, but I'm a complete 
>>> newbie to D. Why does compiling the following trivial code 
>>> fail?
>>>
>>> import std.stdio;
>>>
>>> void main()
>>> {
>>>     writeln(3.14);
>>> }
>>
>> Works fine for me using DMD 2.094.0 on Linux. What OS and 
>> compiler version are you using, and how did you install DMD?
>
> DMD64 D Compiler v2.094.0
> on macOS 10.15.6

I did not use any compiler flags, but just:
dmd test1.d