[3.8] bpo-38239: Fix test_gdb for Link Time Optimization (LTO) (GH-16422)
diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py
index e07d3273a4552d..e1060330550e34 100644
--- a/Lib/test/test_gdb.py
+++ b/Lib/test/test_gdb.py
@@ -255,8 +255,15 @@ def get_gdb_repr(self, source,
         # gdb can insert additional '\n' and space characters in various places
         # in its output, depending on the width of the terminal it's connected
         # to (using its "wrap_here" function)
-        m = re.match(r'.*#0\s+builtin_id\s+\(self\=.*,\s+v=\s*(.*?)?\)\s+at\s+\S*Python/bltinmodule.c.*',
-                     gdb_output, re.DOTALL)
+        m = re.search(
+            # Match '#0 builtin_id(self=..., v=...)'
+            r'#0\s+builtin_id\s+\(self\=.*,\s+v=\s*(.*?)?\)'
+            # Match ' at Python/bltinmodule.c'.
+            # bpo-38239: builtin_id() is defined in Python/bltinmodule.c,
+            # but accept any "Directory\file.c" to support Link Time
+            # Optimization (LTO).
+            r'\s+at\s+\S*[A-Za-z]+/[A-Za-z0-9_-]+\.c',
+            gdb_output, re.DOTALL)
         if not m:
             self.fail('Unexpected gdb output: %r\n%s' % (gdb_output, gdb_output))
         return m.group(1), gdb_output
diff --git a/Misc/NEWS.d/next/Tests/2019-09-26-15-48-36.bpo-38239.MfoVzY.rst b/Misc/NEWS.d/next/Tests/2019-09-26-15-48-36.bpo-38239.MfoVzY.rst
new file mode 100644
index 00000000000000..f79da29fa18288
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2019-09-26-15-48-36.bpo-38239.MfoVzY.rst
@@ -0,0 +1 @@
+Fix test_gdb for Link Time Optimization (LTO) builds.

(cherry picked from commit 64b4a3a2deabcd4103fac2759a311fe94159b4d1)


Co-authored-by: Victor Stinner <vstinner@redhat.com>

<!-- issue-number: [bpo-38239](https://bugs.python.org/issue38239) -->
https://bugs.python.org/issue38239
<!-- /issue-number -->
