Description of the bug

When a run fails to generate a MultiQC report, the email template code throws a NullPointerException from Line 129 of NfcoreTemplate.nf

Specifically in:

if ( mqc_report.size() <= max_multiqc_email_size.toBytes() ) {

mqc_report is null so calling size() throws an exception.

Using the safe navigation operator doesn't fix it since null <= Number results in true.

Discovered this bug from the Nextflow log in nf-core/rnaseq#760

Command used and terminal output

No response

System information

No response