Index: flang/test/Semantics/synchronization02.f90
===================================================================
--- /dev/null
+++ flang/test/Semantics/synchronization02.f90
@@ -0,0 +1,106 @@
+! RUN: %python %S/test_errors.py %s %flang_fc1
+! XFAIL: *
+! Check for semantic errors in sync images statements
+
+program test_sync_images
+  implicit none
+
+  integer, parameter :: invalid_rank(*,*) = reshape([1], [1,1])
+  integer sync_status, non_scalar(2), superfluous_stat, coindexed_integer[*], me
+  character(len=128) error_message, superfluous_errmsg, coindexed_character[*]
+  logical invalid_type
+  
+  !___ standard-conforming statement ___
+
+  sync images(*, stat=sync_status, errmsg=error_message)
+  sync images(*, stat=sync_status                      )
+  sync images(*,                   errmsg=error_message)
+  sync images(*                                        )
+
+  sync images(me,   stat=sync_status, errmsg=error_message)
+  sync images(me+1, stat=sync_status, errmsg=error_message)
+  sync images(1,    stat=sync_status, errmsg=error_message)
+  sync images(1,    stat=sync_status                      )
+  sync images(1,                      errmsg=error_message)
+  sync images(1                                           )
+
+  sync images([1],  stat=sync_status, errmsg=error_message)
+  sync images([1],  stat=sync_status                      )
+  sync images([1],                    errmsg=error_message)
+  sync images([1]                                         )
+
+  !___ non-standard-conforming statement ___
+
+  !______ invalid image sets ______
+
+  ! Image set shall not depend on the value of stat-variable
+  !ERROR: TBD
+  sync images(sync_status, stat=sync_status)
+
+  ! Image set shall not depend on the value of errmsg-variable
+  !ERROR: TBD
+  sync images(len(error_message), errmsg=error_message)
+
+  ! Image set shall be a scalar or rank-1 array
+  !ERROR: TBD
+  sync images(invalid_rank)
+ 
+  !______ invalid sync-stat-lists: invalid stat= ____________
+
+  ! Invalid sync-stat-list keyword
+  !ERROR: expected ')'
+  sync images(1, status=sync_status)
+
+  !ERROR: TBD
+  sync images([1], stat=invalid_type)
+
+  ! Stat-variable must an integer scalar
+  !ERROR: TBD
+  sync images(*, stat=non_scalar)
+ 
+  ! Invalid sync-stat-list: missing stat-variable
+  !ERROR: expected ')'
+  sync images(1, stat)
+
+  ! Invalid sync-stat-list: missing 'stat='
+  !ERROR: expected ')'
+  sync images([1], sync_status)
+
+  !______ invalid sync-stat-lists: invalid errmsg= ____________
+
+  ! Invalid errmsg-variable keyword
+  !ERROR: expected ')'
+  sync images(*, errormsg=error_message)
+
+  !ERROR: TBD
+  sync images(1, errmsg=invalid_type)
+
+  ! Invalid sync-stat-list: missing 'errmsg='
+  !ERROR: expected ')'
+  sync images([1], error_message)
+
+  ! Invalid sync-stat-list: missing errmsg-variable
+  !ERROR: expected ')'
+  sync images(*, errmsg)
+
+  !______ invalid sync-stat-lists: redundant sync-stat-list ____________
+
+  ! No specifier shall appear more than once in a given sync-stat-list
+  !ERROR: to be determined
+  sync images(1, stat=sync_status, stat=superfluous_stat)
+
+  ! No specifier shall appear more than once in a given sync-stat-list
+  !ERROR: to be determined
+  sync images([1], errmsg=error_message, errmsg=superfluous_errmsg)
+ 
+  !______ invalid sync-stat-lists: coindexed stat-variable ____________
+
+  ! Check constraint C1173 from the Fortran 2018 standard
+  !ERROR: to be determined
+  sync images(*, stat=coindexed_integer[1])
+ 
+  ! Check constraint C1173 from the Fortran 2018 standard
+  !ERROR: to be determined
+  sync images(1, errmsg=coindexed_character[1])
+
+end program test_sync_images