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-rw-r--r--src/vhdl/vhdl-ieee-std_logic_arith.adb7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/vhdl/vhdl-ieee-std_logic_arith.adb b/src/vhdl/vhdl-ieee-std_logic_arith.adb
index ab6ba9646..abb7218d2 100644
--- a/src/vhdl/vhdl-ieee-std_logic_arith.adb
+++ b/src/vhdl/vhdl-ieee-std_logic_arith.adb
@@ -82,6 +82,13 @@ package body Vhdl.Ieee.Std_Logic_Arith is
begin
Decl := Get_Declaration_Chain (Pkg);
+ if Decl /= Null_Iir
+ and then Get_Kind (Decl) = Iir_Kind_Use_Clause
+ then
+ -- Mentor version. Don't extract and don't crash.
+ return;
+ end if;
+
-- The first declaration should be type Unsigned.
if not (Decl /= Null_Iir
and then Get_Kind (Decl) = Iir_Kind_Type_Declaration