--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/coarray_2.f90	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,47 @@
+! { dg-do run }
+! { dg-options "-fcoarray=single" }
+! { dg-shouldfail "error stop" }
+! 
+! Coarray support
+! PR fortran/18918
+
+implicit none
+integer :: n
+character(len=30) :: str
+critical
+end critical
+myCr: critical
+end critical myCr
+  sync all
+  sync all ( )
+  n = 5
+  sync all (stat=n)
+  if (n /= 0) call abort()
+  n = 5
+  sync all (stat=n,errmsg=str)
+  if (n /= 0) call abort()
+  sync all (errmsg=str)
+
+  sync memory
+  sync memory ( )
+  n = 5
+  sync memory (stat=n)
+  if (n /= 0) call abort()
+  n = 5
+  sync memory (errmsg=str,stat=n)
+  if (n /= 0) call abort()
+  sync memory (errmsg=str)
+
+sync images (*, stat=n)
+sync images (1, errmsg=str)
+sync images ([1],errmsg=str,stat=n)
+
+sync images (*)
+sync images (1)
+sync images ([1])
+
+if (num_images() /= 1) call abort()
+error stop 'stop'
+end
+
+! { dg-output "ERROR STOP stop" }