test_gdb: enhance regex used to parse the GDB version

Lib/test/test_gdb.py

@@ -10,21 +10,36 @@ import sys
 import unittest
 import sysconfig
 
+from test import test_support
 from test.test_support import run_unittest, findfile
 
-try:
-    gdb_version, _ = subprocess.Popen(["gdb", "-nx", "--version"],
-                                      stdout=subprocess.PIPE).communicate()
-except OSError:
-    # This is what "no gdb" looks like.  There may, however, be other
-    # errors that manifest this way too.
-    raise unittest.SkipTest("Couldn't find gdb on the path")
-gdb_version_number = re.search("^GNU gdb [^\d]*(\d+)\.(\d)", gdb_version)
-gdb_major_version = int(gdb_version_number.group(1))
-gdb_minor_version = int(gdb_version_number.group(2))
+def get_gdb_version():
+    try:
+        proc = subprocess.Popen(["gdb", "-nx", "--version"],
+                                stdout=subprocess.PIPE,
+                                universal_newlines=True)
+        version = proc.communicate()[0]
+    except OSError:
+        # This is what "no gdb" looks like.  There may, however, be other
+        # errors that manifest this way too.
+        raise unittest.SkipTest("Couldn't find gdb on the path")
+
+    # Regex to parse:
+    # 'GNU gdb (GDB; SUSE Linux Enterprise 12) 7.7\n' -> 7.7
+    # 'GNU gdb (GDB) Fedora 7.9.1-17.fc22\n' -> 7.9
+    # 'GNU gdb 6.1.1 [FreeBSD]\n'
+    match = re.search("^GNU gdb.*? (\d+)\.(\d)", version)
+    if match is None:
+        raise Exception("unable to parse GDB version: %r" % version)
+    return (version, int(match.group(1)), int(match.group(2)))
+
+gdb_version, gdb_major_version, gdb_minor_version = get_gdb_version()
 if gdb_major_version < 7:
-    raise unittest.SkipTest("gdb versions before 7.0 didn't support python embedding"
-                            " Saw:\n" + gdb_version)
+    raise unittest.SkipTest("gdb versions before 7.0 didn't support python "
+                            "embedding. Saw %s.%s:\n%s"
+                            % (gdb_major_version, gdb_minor_version,
+                               gdb_version))
+
 if sys.platform.startswith("sunos"):
     raise unittest.SkipTest("test doesn't work very well on Solaris")
 
@@ -781,6 +796,10 @@ class PyLocalsTests(DebuggerTests):
                                     r".*\na = 1\nb = 2\nc = 3\n.*")
 
 def test_main():
+    if test_support.verbose:
+        print("GDB version %s.%s:" % (gdb_major_version, gdb_minor_version))
+        for line in gdb_version.splitlines():
+            print(" " * 4 + line)
     run_unittest(PrettyPrintTests,
                  PyListTests,
                  StackNavigationTests,