testsuite/synth: add test for #1265

1 files changed, 14 insertions, 0 deletions

diff --git a/testsuite/synth/issue1265/issue.vhdl b/testsuite/synth/issue1265/issue.vhdl
new file mode 100644
index 000000000..098305fa4
--- /dev/null
+++ b/testsuite/synth/issue1265/issue.vhdl
@@ -0,0 +1,14 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity issue is
+    port (sub_uns : out unsigned (8-1 downto 0);
+          sub_sgn : out   signed (8-1 downto 0));
+end issue;
+
+architecture beh of issue is
+begin
+    sub_uns <= unsigned'(b"0000_0000") - 1; -- works
+    sub_sgn <=   signed'(b"0000_0000") - 1; -- fails
+end architecture beh;