ar_table can be converted to st_table just after ar_do_hash()
function which calls #hash method. We need to check
the representation to detect this mutation.
[Bug #16676]
(cherry picked from commit 4c019f5a626523e99e2827ed917802e3097c380d)
Related issues
Bug #16676: `#hash` can change Hash object from ar_table to st_table
Added by ko1 (Koichi Sasada) about 5 years ago
check ar_table after
#hashcallar_table can be converted to st_table just after
ar_do_hash()function which calls
#hashmethod. We need to checkthe representation to detect this mutation.
[Bug #16676]
(cherry picked from commit 4c019f5a626523e99e2827ed917802e3097c380d)