add debug

Author: Massimiliano Pippi

test/test_core.py

@@ -114,7 +114,9 @@ def test_core_install_esp32(run_command, data_dir):
     # create a sketch and compile to double check the core was successfully installed
     sketch_path = os.path.join(data_dir, "test_core_install_esp32")
     assert run_command("sketch new {}".format(sketch_path))
-    assert run_command("compile -b esp32:esp32:esp32 {}".format(sketch_path))
+    out = run_command("compile -b esp32:esp32:esp32 {}".format(sketch_path))
+    print(out.stderr)
+    assert out.ok
     # prevent regressions for https://github.com/arduino/arduino-cli/issues/163
     assert os.path.exists(
         os.path.join(