3 files changed, 54 insertions, 0 deletions
diff --git a/sem_assocs.adb b/sem_assocs.adb
index 87081f4cf..c4a9bce74 100644
--- a/sem_assocs.adb
+++ b/sem_assocs.adb
@@ -489,6 +489,7 @@ package body Sem_Assocs is
                Sub := Create_Iir (Iir_Kind_Association_Element_By_Individual);
                Location_Copy (Sub, Formal);
                Set_Formal (Sub, Iassoc);
+               Set_Associated (Iassoc, Sub);
                Iassoc := Sub;
             else
                case Get_Kind (Sub) is
diff --git a/testsuite/gna/bug17759/test.vhdl b/testsuite/gna/bug17759/test.vhdl
new file mode 100644
index 000000000..8f019b355
--- /dev/null
+++ b/testsuite/gna/bug17759/test.vhdl
@@ -0,0 +1,43 @@
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+package test is
+  type array_t is array (1 downto 0) of std_logic_vector(1 downto 0);
+end package test;
+
+
+use work.test.all;
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity b is
+  port (io_a : inout array_t);
+end entity b;
+
+architecture rtl of b is
+begin  -- architecture dummy
+  io_a <= ("HH", "LL");
+end architecture rtl;
+
+
+use work.test.all;
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity a is
+    port (io_v : inout std_logic_vector(1 downto 0);
+          io_1 : inout std_logic;
+          io_2 : inout std_logic);
+end entity a;
+
+architecture rtl of a is
+  component b is
+    port (io_a : inout array_t);
+  end component b;
+begin  -- architecture rtl
+  b1 : b port map (
+    io_a(0) => io_v,
+    io_a(1)(0) => io_1,
+    io_a(1)(1) => io_2);
+end architecture rtl;
diff --git a/testsuite/gna/bug17759/testsuite.sh b/testsuite/gna/bug17759/testsuite.sh
new file mode 100755
index 000000000..3de908b5c
--- /dev/null
+++ b/testsuite/gna/bug17759/testsuite.sh
@@ -0,0 +1,10 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+analyze test.vhdl
+elab_simulate a
+
+clean
+
+echo "Test successful"