xapian-core 1.4.21: 20 tests fail on i686

Hi,

(Unable to register on bug tracker, so writing here.)
While building package for ALT Linux I found that when tests are run on
i686 (32-bit x86 flavour) with 'make check' for 1.4.21 release, they
fail with:

  1 of 4 tests failed

this is

  ./apitest backend inmemory: 326 tests passed, 4 failed, 8 skipped.
  ./apitest backend glass: 423 tests passed, 4 failed, 3 skipped.
  ./apitest backend singlefile_glass: 261 tests passed, 4 failed, 1 skipped.
  ./apitest backend multi_glass: 351 tests passed, 2 failed, 4 skipped.
  ./apitest backend chert: 419 tests passed, 4 failed, 1 expected failures, 3 skipped.
  ./apitest backend multi_chert: 303 tests passed, 2 failed, 1 expected failures, 4 skipped.
  ./apitest total: 4036 tests passed, 20 failed, 9 expected failures, 47 skipped.
  FAIL: apitest

Detailed failure list:

  builder@i586:~/RPM/BUILD/xapian-core-1.4.21$ grep FAILED log -A3
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight3... FAILED
  Query(WILDCARD SYNONYM a)
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight4... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight3... FAILED
  Query(WILDCARD SYNONYM a)
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight4... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight3... FAILED
  Query(WILDCARD SYNONYM a)
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight4... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight3... FAILED
  Query(WILDCARD SYNONYM a)
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight4... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight1... FAILED
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333
  --
  Running test: checkstatsweight2... FAILED
  Query((a SYNONYM absolut))
  api_weight.cc:1013: ((get_average_length()) == (db.get_avlength()))
  Expected 'get_average_length()' and 'db.get_avlength()' to be equal: were 30.8333 and 30.8333

(Empty lines removed.) On other architectures we build tests succeed (aarch64,
arm7hf, ppc64le, x86_64). Would appreciate help resolving this.

Thanks,