A possible readf int bug

[jfondren]

On Sunday, 27 June 2021 at 19:50:09 UTC, Matilda wrote:
> I'm trying to read from stdin and then print an integer value. 
> This is how my code looks like:
> ```d
> import std.stdio;
> import std.conv;
> import std.string;
>
> void main()
> {
>     writeln("Input your variant (1 - 10):");
>     int key;
>     //readf(" %d", &key);
>     //readf!" %d"(key);
>
>     key = readln.strip.to!int;
>
>     writefln("Your variant is: %d", key);
> }
> ```
> The problem is that the programme doesn't work if I try to use 
> one of the commented readf functions. It doesn't print the last 
> phrase. There is no error message. It just waits for nothing 
> apparently. It works with the stip.to!int line, so the problem 
> must be with readf.
> I'm kind of new to this language and I don't have much 
> experience with programming in general, so I have no way to 
> know if it's just me being dumb or I've accidently found a bug.
>
> I use DMD32 D Compiler v2.097.0-dirty

This works with either readf line for me on v2.097.0.
Try stracing your program.