:stat() for index return empty array

:stat() for index return empty array

• OS: CentOS Linux release 7.9.2009 (Core)

Tarantool 2.7.3-0-gdddf926
Target: Linux-x86_64-RelWithDebInfo
Build options: cmake . -DCMAKE_INSTALL_PREFIX=/usr -DENABLE_BACKTRACE=ON
Compiler: /opt/rh/devtoolset-8/root/usr/bin/cc /opt/rh/devtoolset-8/root/usr/bin/c++
C_FLAGS:-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -fopenmp -msse2 -std=c11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-format-truncation -Wno-gnu-alignof-expression -fno-gnu89-inline -Wno-cast-function-type -Werror
CXX_FLAGS:-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -fopenmp -msse2 -std=c++11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-format-truncation -Wno-invalid-offsetof -Wno-gnu-alignof-expression -Wno-cast-function-type -Werror

At working instance wich used at api space with index call stat for this index.

localhost:3301> box.space.FreeMsisdns.index.FreeMsisdns_pht_id_branch_id_switch_id_phs_id_ttl_idx:len()
---
- 12037761
...

localhost:3301> box.space.FreeMsisdns.index.
box.space.FreeMsisdns.index.FreeMsisdns_message_id_idx                             box.space.FreeMsisdns.index.FreeMsisdns_pht_id_branch_id_switch_id_phs_id_ttl_idx
box.space.FreeMsisdns.index.FreeMsisdns_msisdn_idx                                 box.space.FreeMsisdns.index.FreeMsisdns_select_idx
box.space.FreeMsisdns.index.FreeMsisdns_phone_id_branch_id_idx                     box.space.FreeMsisdns.index.ttl
box.space.FreeMsisdns.index.FreeMsisdns_phs_id_idx
localhost:3301> box.space.FreeMsisdns.index.FreeMsisdns_message_id_idx:stat()
---
- []
...

localhost:3301> box.space.FreeMsisdns.index.FreeMsisdns_msisdn_idx:stat()
---
- []
...

localhost:3301> box.space.FreeMsisdns.index.FreeMsisdns_phone_id_branch_id_idx:stat()
---
- []
...

Start by reproducing the reported behavior at the box.space.FreeMsisdns.index.*:stat() entry points on the described Tarantool setup, comparing the empty statistics with the index's reported len(). Determine why populated indexes return empty arrays, then verify that stat() reports the expected data for the affected indexes.