Better error handling in bugreport command when no command history (#1464)

pwndbg/commands/version.py

@@ -158,9 +158,16 @@ If it is somehow unavailable, use:
     except FileNotFoundError:
         pass
 
-    max_command_no = (
+    max_command_no = 0
-        int(gdb.execute("show commands", to_string=True).split("\n")[-2].split()[0]) - 1
+    history_commands = gdb.execute("show commands", to_string=True)
-    )
+    if history_commands:
+        history_commands = history_commands.split("\n")
+        if len(history_commands > 1):
+            # The last element of the list is the `show commands` command we
+            # just ran, so we need to get the second to last one
+            last_command = history_commands[-2]
+            max_command_no = int(last_command.split()[0]) - 1
+
     show_command_size = 10  # 'show command' returns 10 commands
     gdb_current_session_history = {}
     current_command_no = gdb_history_len + 1

tests/gdb-tests/pytests_launcher.py

@@ -24,9 +24,7 @@ return_code = pytest.main(args)
 
 if return_code != 0:
     print("-" * 80)
-    print(
+    print("If you want to debug tests locally, run ./tests.sh with the --pdb flag")
-        "If you want to debug tests locally, modify {} and add --pdb to its args".format(__file__)
-    )
     print("-" * 80)
 
 sys.exit(return_code)