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1 files changed, 61 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/char_length_5.f90 b/gcc/testsuite/gfortran.dg/char_length_5.f90
new file mode 100644
index 000000000..03a4d8560
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/char_length_5.f90
@@ -0,0 +1,61 @@
+! { dg-do run }
+! Tests the fix for PR31867, in which the interface evaluation
+! of the character length of 'join' (ie. the length available in
+! the caller) was wrong.
+!
+! Contributed by <beliavsky@aol.com> 
+!
+module util_mod
+  implicit none
+contains
+  function join (words, sep) result(str)
+    character (len=*), intent(in)        :: words(:),sep
+    character (len = (size (words) - 1) * len_trim (sep) + & 
+               sum (len_trim (words)))   :: str
+    integer                              :: i,nw
+    nw  = size (words)
+    str = ""
+    if (nw < 1) then
+      return
+    else
+      str = words(1)
+    end if
+    do i=2,nw
+      str = trim (str) // trim (sep) // words(i)
+    end do
+  end function join
+end module util_mod
+!
+program xjoin
+  use util_mod, only: join
+  implicit none
+  integer yy
+  character (len=5) :: words(5:8) = (/"two  ","three","four ","five "/), sep = "^#^"
+  character (len=5) :: words2(4) = (/"bat  ","ball ","goal ","stump"/), sep2 = "&"
+
+  if (join (words, sep) .ne. "two^#^three^#^four^#^five") call abort ()
+  if (len (join (words, sep)) .ne. 25) call abort ()
+
+  if (join (words(5:6), sep) .ne. "two^#^three") call abort ()
+  if (len (join (words(5:6), sep)) .ne. 11) call abort ()
+
+  if (join (words(7:8), sep) .ne. "four^#^five") call abort ()
+  if (len (join (words(7:8), sep)) .ne. 11) call abort ()
+
+  if (join (words(5:7:2), sep) .ne. "two^#^four") call abort ()
+  if (len (join (words(5:7:2), sep)) .ne. 10) call abort ()
+
+  if (join (words(6:8:2), sep) .ne. "three^#^five") call abort ()
+  if (len (join (words(6:8:2), sep)) .ne. 12) call abort ()
+
+  if (join (words2, sep2) .ne. "bat&ball&goal&stump") call abort ()
+  if (len (join (words2, sep2)) .ne. 19) call abort ()
+
+  if (join (words2(1:2), sep2) .ne. "bat&ball") call abort ()
+  if (len (join (words2(1:2), sep2)) .ne. 8) call abort ()
+
+  if (join (words2(2:4:2), sep2) .ne. "ball&stump") call abort ()
+  if (len (join (words2(2:4:2), sep2)) .ne. 10) call abort ()
+
+end program xjoin
+! { dg-final { cleanup-modules "util_mod" } }