From @masak

<lichtkind> rakudo​: my @​d= 1..5; say @​d.fmt( "jojo %d %d");
<p6eval> rakudo 1eadbb​: OUTPUT«Null PMC access in get_integer() [...]
<lichtkind> rakudo​: my @​d= 1..5; say @​d.fmt( "%d", ',');
<p6eval> rakudo 1eadbb​: OUTPUT«1,2,3,4,5␤»
<lichtkind> rakudo​: my @​d= 1..5; say @​d.fmt( "%d-%s");
<p6eval> rakudo 1eadbb​: OUTPUT«Null PMC access in get_string() [...]
<lichtkind> rakudo​: my @​d= 1..5; say @​d.fmt( "-%s");
<p6eval> rakudo 1eadbb​: OUTPUT«-1 -2 -3 -4 -5␤»
<lichtkind> got it :)
<jnthn> npmca ist crap, though.
* masak submits rakudobug
<masak> hello, #perl6 :)
<jnthn> masak. He submits bugs, THEN greets you.
<masak> rakudo​: say sprintf("%d-%s", 42)
<p6eval> rakudo 1eadbb​: OUTPUT«Null PMC access in get_string() [...]
<masak> sprintf is the real culprit.
<jnthn> ah
* moritz thought so

From @labster

Also this has a similar Null PMC error​:

1.1.fmt('%.*f')
Probably from not having the multiple argument form as in perl 5.

From @FROGGS

Fixed, tests are at Raku/roast@2647c16652

The RT System itself - Status changed from 'new' to 'open'

@FROGGS - Status changed from 'open' to 'resolved'