invalid flair quantify -r argument is detected but does not error exit

[diekhans]

make test-quantify-seg1                                                                   
rm -rf output/test-quantify-seg1.tmp                                                                          flair quantify -r input/seg1.cdna-ont.fastq -i expected/test-collapse-seg1.isoforms.fa --isoform_bed expected$
Starting quantify...                                                                                          Expected 4 columns in tab-delimited manifest.tsv, got 1. Exiting.                                             
Flair quantify took 0 minutes and 0 seconds                                                                                                                                                                                 
Flair took 0 minutes and 0 seconds and finished without issues.                                                                                                                                                             
FLAIR HAS FINISHED