Raku crashes, "left argument in overloaded package Perl6::Object"

Question

I'm writing an excel xlsx spreadsheet with Raku and inline::Perl5.

When I write a line like

$file-location-ws.write($row, 2, $csv);

Raku crashes with the cryptic error message

Operation "eq": no method found, left argument in overloaded package Perl6::Object, right argument has no overloaded magic at /usr/local/share/perl/5.26.0/Excel/Writer/XLSX/Worksheet.pm line 2020.

in method invoke-parent at /home/con/.perl6/sources/130449F27E85303EEC9A19017246A5ED249F99E4 (Inline::Perl5) line 674 in sub many-args at /usr/lib/perl6/site/sources/D38010D24322CE1B1E6FFD8A463F23ED864152E9 (Inline::Perl5::ClassHOW) line 195 in block at 8.make_xlsx.p6 line 100

but if I replace $csv with a literal string of the filename 'Pumbaa Validation Plate 1 samplesheet.csv' thus

$file-location-ws.write($row, 2, 'Pumbaa Validation Plate 1 samplesheet.csv');

it works just fine. Obviously, this isn't a solution, since $csv will change.

Why is this error happening? How can I fix it?

Answer 1

The problem here is that the write function expects a variable/container of type Str but is getting an IO::Path.

This is easily solved by assigning the variable to be written as a Str type.

The issue was that the error message gave no hint whatsoever of this.