Chi-squared statistic
Degrees of freedom: (number of groups with a positive expected count) - 1, or the rank of the variance matrix of those groups (all but the first) when it is singular
Weighted expected number of events per group
R's names of the groups, "group=<label>", in the order of the sorted labels
Number of observations per group
Weighted observed number of events per group
Upper chi-squared tail on df degrees of freedom (NaN for df = 0: the data carry no information on the groups)
Alias of pvalue: the same value.
Variance matrix of obs - exp (array of rows)
R's warnings, each once, in R's order (an empty array when there are none).
Result of survdiff.