featureCounts process fails when setting --fc_count_type to gene

[pcantalupo]

I'm trying to run pipeline with a BK virus GTF file (contents of the GTF file are here) which does not contain exon as a count-type. Therefore, I set --fc_count_type to gene.

When I run:
nextflow run nf-core/rnaseq -profile docker --aligner hisat2 -r 1.4.2 --reads 'data/SRR11074360_{1,2}_10k.fastq' --reverseStranded --max_cpus 3 --max_memory 12GB -c config_bkv.txt --fc_count_type gene --fc_group_features gene_id --fc_group_features_type gbkey

The first featureCounts command executes properly:
featureCounts -a GCF_000837865.1_ViralProj14074_genomic.gtf -g gene_id -t gene -o SRR11074360_1_10k.sorted_gene.featureCounts.txt --extraAttributes gene_name -p -s 2 SRR11074360_1_10k.sorted.bam

But the second one featureCounts -a GCF_000837865.1_ViralProj14074_genomic.gtf -g gbkey -o SRR11074360_1_10k.sorted_biotype.featureCounts.txt -p -s 2 SRR11074360_1_10k.sorted.bam fails with the error: ERROR: no features were loaded in format GTF. The annotation format can be specified by the '-F' option, and the required feature type can be specified by the '-t' option... I think this is because the -t gene option is not added to the FC command line on this line: https://github.com/nf-core/rnaseq/blob/master/main.nf#L1401. Therefore FC rightly declares that it cannot find any "features".