Minor fixes in address resolving.

src/internal/address/resolve.cc

@@ -18,23 +18,29 @@ uint64_t Address::resolve(BEd &ctx) {
       } else if constexpr (std::is_same_v<T, Number>) {
         line = addr.i;
       } else if constexpr (std::is_same_v<T, Block>) {
+        uint64_t current_line = ctx.active->line;
+        if (ctx.active->vase.lines() > 0 && current_line == 0)
+          current_line = 1;
         if (addr.dir == Direction::Forward) {
           if (ctx.active->parser) {
-            if (ctx.active->line == 0)
+            uint64_t closing = ctx.active->parser->next_closing(current_line - 1);
-              ctx.active->line = 1;
+            if (closing == UINT64_MAX)
-            line = ctx.active->parser->next_closing(ctx.active->line - 1) + 1;
+              line = ctx.active->vase.lines();
+            else
+              line = closing + 1;
+          } else {
+            line = current_line + 10;
             if (line > ctx.active->vase.lines())
               line = ctx.active->vase.lines();
-          } else {
-            line = ctx.active->line + 10;
           }
         } else {
           if (ctx.active->parser) {
-            if (ctx.active->line == 0)
+            line = ctx.active->parser->prev_opening(current_line - 1) + 1;
-              ctx.active->line = 1;
-            line = ctx.active->parser->prev_opening(ctx.active->line - 1) + 1;
           } else {
-            line = ctx.active->line - 10;
+            if (current_line > 10)
+              line = current_line - 10;
+            else
+              line = 0;
           }
         }
       } else {

src/internal/commands/commands.cc

@@ -107,7 +107,7 @@ void Command::register_posix(BEd &ctx) {
       .address_mode = Command::AddressMode::Single,
       .suffix = Command::SuffixKind::Suffix,
       .desc = "Print line number",
-      .accept_zero = false,
+      .accept_zero = true,
       .handle = [](BEd &ctx, std::span<const uint64_t> addresses, std::string_view) {
         if (!addresses.size())
           std::cout << ctx.active->vase.lines() << std::endl;