Open
Description
Concurrent calls to AddVertex, AddEdge, and AdjacencyMap redundantly panic.
panic: assignment to entry in nil map
goroutine 1996 [running]:
github.com/dominikbraun/graph.(*undirected[...]).AdjacencyMap(0xc0009542c0?)
github.com/dominikbraun/[email protected]/undirected.go:167 +0x225
ListVertices and ListEdges directly occur AddVertex and AddEdge will cause this problem