HiC track regression? ReferenceError buffer not defined in 2.15.3?

[fubar2]

Describe the bug 2.15.0 works, but a simple test with a HiC track fails in 2.15.3 with

To Reproduce

jbrowse create jb2.15.3 -t v2.15.3 
cd jb2.15.3/
jbrowse add-assembly --load symlink ../hg19.fa 
jbrowse add-track --load symlink ../GSE63525_HMEC_combined.hic 
cd ..
jbrowse create jb2.15.0 -t v2.15.0 
cd jb2.15.0/
jbrowse add-assembly --load symlink ../hg19.fa 
jbrowse add-track --load symlink ../GSE63525_HMEC_combined.hic 

Expected behavior With 2.15.0:

Screenshots

Version: 2.15.3 vs 2.15.0

[cmdcolin]

thanks so much for reporting this. I can confirm, there were some changes to the build to try to avoid the use of nodejs polyfills and this was a casualty....fix in #4584

[cmdcolin]

went ahead an cut a release to fix this in v2.15.4!

[fubar2]

Thanks @cmdcolin - that fixed it - thank you very much for the quick fix!