Facing same kind of issue in using d3-hierarchy for pack layout. Please check the data i am using,
["a",5.473061352023348e+21], ["b", 1.1729457180068344e+21], ["c", 1023]

Checkout the error stack messages

at extendBasis (d3-hierarchy.v1.js:353)
at enclose (d3-hierarchy.v1.js:321)
at packEnclose (d3-hierarchy.v1.js:536)
at d3-hierarchy.v1.js:626
at Node.node_eachAfter [as eachAfter] (d3-hierarchy.v1.js:140)
at pack (d3-hierarchy.v1.js:586)

Need a fix for this issue @mbostock

Originally posted by @aarthi0808 in #100 (comment)