Strange OSX make check-world failure

============== creating temporary instance            ==============

============== initializing database system           ==============

============== starting postmaster                    ==============

running on port 50853 with PID 20314

============== creating database "ecpg1_regression"   ==============

CREATE DATABASE

ALTER DATABASE

============== creating database "ecpg2_regression"   ==============

CREATE DATABASE

ALTER DATABASE

============== creating role "regress_ecpg_user1"     ==============

CREATE ROLE

GRANT

GRANT

============== creating role "regress_ecpg_user2"     ==============

CREATE ROLE

GRANT

GRANT

============== running regression test queries        ==============

test compat_informix/dec_test ... ok

test compat_informix/charfuncs ... ok

test compat_informix/rfmtdate ... ok

test compat_informix/rfmtlong ... ok

test compat_informix/rnull    ... ok

test compat_informix/sqlda    ... ok

test compat_informix/describe ... ok

test compat_informix/test_informix ... ok

test compat_informix/test_informix2 ... ok

test connect/test2            ... ok

test connect/test3            ... ok

test connect/test4            ... ok

test connect/test5            ... ok

test pgtypeslib/dt_test       ... stdout stderr FAILED (test process was terminated by signal 6: Abort trap)

test pgtypeslib/dt_test2      ... stdout stderr FAILED (test process was terminated by signal 6: Abort trap)

test pgtypeslib/num_test      ... stdout stderr FAILED (test process was terminated by signal 6: Abort trap)

test pgtypeslib/num_test2     ... stdout stderr FAILED (test process was terminated by signal 6: Abort trap)

test pgtypeslib/nan_test      ... ok

test preproc/array_of_struct  ... ok

test preproc/pointer_to_struct ... ok

test preproc/autoprep         ... ok

test preproc/comment          ... ok

test preproc/cursor           ... ok

test preproc/define           ... ok

test preproc/init             ... ok

test preproc/strings          ... ok

test preproc/type             ... ok

test preproc/variable         ... ok

test preproc/outofscope       ... ok

test preproc/whenever         ... ok

test sql/array                ... ok

test sql/binary               ... ok

test sql/code100              ... ok

test sql/copystdout           ... ok

test sql/define               ... ok

test sql/desc                 ... ok

test sql/sqlda                ... stdout stderr FAILED (test process was terminated by signal 6: Abort trap)

test sql/describe             ... ok

test sql/dynalloc             ... ok

test sql/dynalloc2            ... ok

test sql/dyntest              ... ok

test sql/execute              ... ok

test sql/fetch                ... ok

test sql/func                 ... ok

test sql/indicators           ... ok

test sql/oldexec              ... ok

test sql/quote                ... ok

test sql/show                 ... ok

test sql/insupd               ... ok

test sql/parser               ... ok

test thread/thread            ... ok

test thread/thread_implicit   ... ok

test thread/prep              ... ok

test thread/alloc             ... ok

test thread/descriptor        ... ok

test sql/twophase             ... stderr FAILED

============== shutting down postmaster               ==============

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 6 of 56 tests failed. 

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