bedtools maskfasta with incomplete chromosomes

[r-poloni]

Hi! I was trying to mask a multi-fasta file with a bed file, and discovered that bedtools provides a program that does exactly this, but at the same time not exactly. The program masks a fasta file with complete chromosomes. So if I have

test.fa

chr1
AAATGTTTAT
chr2
ATTTTGG

and test.bed
chr1 0 1
chr2 2 3

The result of
bedtools maskfasta -fi test.fa -fo test_masked.fa -bed test.bed

Would be a file test_masked.fa

chr1
NAATGTTTAT
chr2
ATNTTGG

However, if I have a file like this
test.fa

chr1:1-5
AAATG
chr1:6-10
TTTAT
chr2:1-7
ATTTTGG

And I run the same line of code, I will obtain a file where the sequences are not changed, but at the same time no error is printed on the screen, saying that the program could not find a match between the fasta file and the bed file.

chr1:1-5
AAATG
chr1:6-10
TTTAT
chr2:1-7
ATTTTGG

I feel it would be very useful if bedtools would implement a masking also for non complete sequences, or at least print an error when no match is found