fix(runtest.py): Improve error handling and logging for operations

ci/coding_guidelines_check.py

@@ -145,7 +145,7 @@ def run_clang_format_diff(root: Path, commits: str) -> bool:
         found = False
         for summary in [x for x in diff_content if x.startswith("diff --git")]:
             # b/path/to/file -> path/to/file
-            with_invalid_format = re.split("\s+", summary)[-1][2:]
+            with_invalid_format = re.split(r"\s+", summary)[-1][2:]
             if not is_excluded(with_invalid_format):
                 print(f"--- {with_invalid_format} failed on code style checking.")
                 found = True

test-tools/addr2line/addr2line.py

@@ -206,7 +206,7 @@ def get_line_info_from_function_addr_sourcemapping(
         if not line:
             continue
 
-        m = re.match("(.*):(\d+):(\d+)", line)
+        m = re.match(r"(.*):(\d+):(\d+)", line)
         if m:
             function_file, function_line, function_column = m.groups()
             continue

tests/wamr-test-suites/spec-test-script/all.py

@@ -247,7 +247,7 @@ def test_case(
         CMD,
         bufsize=1,
         stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
         universal_newlines=True,
     ) as p:
         try:
@@ -285,7 +285,9 @@ def test_case(
         except subprocess.TimeoutExpired:
             print("failed with TimeoutExpired")
             raise Exception(case_name)
-
+        except Exception as e:
+            print(f"An unexpected error occurred: {e}")
+            raise e
 
 def test_suite(
     target,