test: flaky box/tree_pk_multipart.test.lua test

[avtikhon]

Tarantool version:
Tarantool 2.7.0-48-gbdd5d5e9e
Target: Darwin-x86_64-RelWithDebInfo
Build options: cmake . -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_BACKTRACE=ON
Compiler: /Library/Developer/CommandLineTools/usr/bin/cc /Library/Developer/CommandLineTools/usr/bin/c++
C_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -std=c11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-gnu-alignof-expression -Werror
CXX_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -std=c++11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-invalid-offsetof -Wno-gnu-alignof-expression -Werror

OS version:
OSX 15

Bug description:

1. https://gitlab.com/tarantool/tarantool/-/jobs/851997007#L3842

artifacts.zip

results file checksum: e8c7465cac97fab9157025694c1eabea

[038] --- box/tree_pk_multipart.result	Fri Nov 13 02:14:56 2020
[038] +++ /tmp/tnt/rejects/box/tree_pk_multipart.reject	Mon Nov 16 20:33:44 2020
[038] @@ -620,7 +620,7 @@
[038]  ...
[038]  good
[038]  ---
[038] -- true
[038] +- false
[038]  ...
[038]  s1:drop()
[038]  ---
[038] @@ -687,7 +687,7 @@
[038]  ...
[038]  good
[038]  ---
[038] -- true
[038] +- false
[038]  ...
[038]  s1:drop()
[038]  ---
[038] 

2. https://gitlab.com/tarantool/tarantool/-/jobs/852252006#L4936

artifacts.zip

results file checksum: ceb912a9c88a35bd1622f30989eaca95

[001] --- box/tree_pk_multipart.result	Thu Nov 12 16:52:28 2020
[001] +++ /tmp/tnt/rejects/box/tree_pk_multipart.reject	Mon Nov 16 20:40:05 2020
[001] @@ -652,17 +652,18 @@
[001]  ...
[001]  s1:create_index('test', {type = 'tree', parts = {{1, 'str'}, {2, 'num'}}, hint = false}).hint
[001]  ---
[001] -- false
[001] +- error: 'Supplied key type of part 1 does not match index part type: expected string'
[001]  ...
[001]  s2 = box.schema.space.create('test2')
[001]  ---
[001]  ...
[001]  s2:create_index('test', {type = 'tree', parts = {{1, 'str'}, {2, 'num'}}, hint = true}).hint
[001]  ---
[001] -- true
[001] +- error: 'Supplied key type of part 1 does not match index part type: expected string'
[001]  ...
[001]  for j = 1,N2 do for i = 1,N1 do s1:replace{t1[i], t2[j]} s2:replace{t1[i], t2[j]} end end
[001]  ---
[001] +- error: 'No index #0 is defined in space ''test1'''
[001]  ...
[001]  s1:count() == s2:count()
[001]  ---
[001] @@ -670,13 +671,14 @@
[001]  ...
[001]  equal(s1:select{}, s2:select{})
[001]  ---
[001] -- true
[001] +- error: 'No index #0 is defined in space ''test1'''
[001]  ...
[001]  good = true
[001]  ---
[001]  ...
[001]  for i = 1,N1*2 do good = good and equal(s1:select{t1[i]}, s2:select{t1[i]}) end
[001]  ---
[001] +- error: 'No index #0 is defined in space ''test1'''
[001]  ...
[001]  good
[001]  ---
[001] @@ -684,6 +686,7 @@
[001]  ...
[001]  for i = 1,N1*2 do for j=1,N2*2 do good = good and equal(s1:select{t1[i], t2[j]}, s2:select{t1[i], t2[j]}) end end
[001]  ---
[001] +- error: 'No index #0 is defined in space ''test1'''
[001]  ...
[001]  good
[001]  ---
[001] 

Steps to reproduce:

Optional (but very desirable):

• coredump
• backtrace
• netstat