id,summary,reporter,owner,description,type,status,priority,milestone,component,resolution,keywords,cc,work_issues,upstream,reviewer,author,merged,dependencies,stopgaps
2947,[with patch; positive review] block_matrix([]) fails,wjp,was,"While debugging #2946 on IRC, Jason found that {{{block_matrix()}}} doesn't properly handle an empty list.

The attached patch makes {{{block_matrix([])}}} return a 0x0 matrix over ZZ. If nrows and ncols are also specified, and subdivide isn't false, this 0x0 matrix will be further subdivided into nrows x ncols 0x0 matrices. This subdivision might be overkill, but it's probably the most consistent return value. Other opinions are welcome, of course.",defect,closed,minor,sage-3.0,linear algebra,fixed,,,,,,,,,