dbgllvm: fix crash when generating debug info for procdef of imported struct

compiler/llvm/dbgllvm.pas

@@ -1249,31 +1249,29 @@ implementation
           exit;
         defnumberlist.Add(def);
 
+        def.dbg_state:=dbg_state_writing;
+        { difference compared to other kinds of defs: the DISubProgram gets
+          created directly in get_def_metatai because a typedef for a
+          DISubProgram does not make sense and is not supported by LLVM ->
+          don't set the implementation of the metadata def here and just use
+          the regular node }
+        dinode:=def_meta_node(def);
+
         { we have to attach the debug info to the definition instruction of the
           proc }
         prologfileinfo:=nil;
-        procdeftai:=def.procstarttai;
+        procdeftai:=nil;
         if in_currentunit then
           begin
-            if not assigned(procdeftai) or
-               (procdeftai.typ<>ait_llvmdecl) or
+            procdeftai:=def.procstarttai;
+            if (procdeftai.typ<>ait_llvmdecl) or
                (taillvmdecl(procdeftai).def<>def) then
               internalerror(2022022010);
+            taillvmdecl(procdeftai).addinsmetadata(tai_llvmmetadatareferenceoperand.createreferenceto('dbg',dinode));
           end;
 
-        def.dbg_state:=dbg_state_writing;
-
-        { difference compared to other kinds of defs: the DISubProgram gets
-          created directly in get_def_metatai because a typedef for a
-          DISubProgram does not make sense and is not supported by LLVM ->
-          don't set the implementation of the metadata def here and just use
-          the regular node }
-        dinode:=def_meta_node(def);
-        taillvmdecl(procdeftai).addinsmetadata(tai_llvmmetadatareferenceoperand.createreferenceto('dbg',dinode));
         dinode.addstring('name',symdebugname(def.procsym));
         try_add_file_metaref(dinode,def.fileinfo,true);
-        if assigned(prologfileinfo) then
-          dinode.addint64('scopeLine',prologfileinfo^.line);
         dispflags:=getdispflags(in_currentunit);
         if dispflags<>'' then
           dinode.addenum('spFlags',dispflags);