From a326c24f6949a96e63b5f7912d892f0e7c8fbbe6 Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Wed, 29 Mar 2023 23:32:41 -0700
Subject: [PATCH 1/4] Draft for pdb multiline support

---
 Lib/pdb.py           | 26 +++++++++++++++++++++++++-
 Lib/test/test_pdb.py |  2 +-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Lib/pdb.py b/Lib/pdb.py
index 3a06cd00ad2bf1..932173dff18ba8 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -76,6 +76,7 @@
 import dis
 import code
 import glob
+import codeop
 import pprint
 import signal
 import inspect
@@ -438,7 +439,30 @@ def default(self, line):
         locals = self.curframe_locals
         globals = self.curframe.f_globals
         try:
-            code = compile(line + '\n', '<stdin>', 'single')
+            if (code := codeop.compile_command(line + '\n', '<stdin>', 'single')) is None:
+                # Multi-line mode
+                buffer = line
+                continue_prompt = "...   "
+                while (code := codeop.compile_command(buffer, '<stdin>', 'single')) is None:
+                    if self.use_rawinput:
+                        try:
+                            line = input(continue_prompt)
+                        except (EOFError, KeyboardInterrupt):
+                            self.lastcmd = ""
+                            print('\n')
+                            return
+                    else:
+                        self.stdout.write(continue_prompt)
+                        self.stdout.flush()
+                        line = self.stdin.readline()
+                        if not len(line):
+                            self.lastcmd = ""
+                            self.stdout.write('\n')
+                            self.stdout.flush()
+                            return
+                        else:
+                            line = line.rstrip('\r\n')
+                    buffer += '\n' + line
             save_stdout = sys.stdout
             save_stdin = sys.stdin
             save_displayhook = sys.displayhook
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index de2bab46495729..6edfe76edb86fb 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -387,7 +387,7 @@ def test_pdb_breakpoints_preserved_across_interactive_sessions():
     1   breakpoint   keep yes   at ...test_pdb.py:...
     2   breakpoint   keep yes   at ...test_pdb.py:...
     (Pdb) break pdb.find_function
-    Breakpoint 3 at ...pdb.py:97
+    Breakpoint 3 at ...pdb.py:98
     (Pdb) break
     Num Type         Disp Enb   Where
     1   breakpoint   keep yes   at ...test_pdb.py:...

From 3684e3ab2c94d86f340f5a4cd3b5bf8a6df3861c Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Wed, 29 Mar 2023 23:41:14 -0700
Subject: [PATCH 2/4] Do not use actual line number for the test

---
 Lib/test/test_pdb.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 6edfe76edb86fb..8f112050da5462 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -387,7 +387,7 @@ def test_pdb_breakpoints_preserved_across_interactive_sessions():
     1   breakpoint   keep yes   at ...test_pdb.py:...
     2   breakpoint   keep yes   at ...test_pdb.py:...
     (Pdb) break pdb.find_function
-    Breakpoint 3 at ...pdb.py:98
+    Breakpoint 3 at ...pdb.py:...
     (Pdb) break
     Num Type         Disp Enb   Where
     1   breakpoint   keep yes   at ...test_pdb.py:...

From 2dcfce79a8fd12068be830011dfdaf99bdd2bf7b Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Sat, 8 Apr 2023 20:52:04 -0700
Subject: [PATCH 3/4] Add test for multiline statement

---
 Lib/test/test_pdb.py | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 8f112050da5462..bf9df505b41e90 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -1481,6 +1481,32 @@ def test_pdb_next_command_subiterator():
     (Pdb) continue
     """
 
+def test_pdb_multiline_statement():
+    """Test for multiline statement
+
+    >>> def test_function():
+    ...     import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+    ...     pass
+
+    >>> with PdbTestInput([  # doctest: +NORMALIZE_WHITESPACE
+    ...     'def f(x):',
+    ...     '  return x * 2',
+    ...     '',
+    ...     'f(2)',
+    ...     'c'
+    ... ]):
+    ...     test_function()
+    > <doctest test.test_pdb.test_pdb_multiline_statement[0]>(3)test_function()
+    -> pass
+    (Pdb) def f(x):
+    ...     return x * 2
+    ...
+    (Pdb) f(2)
+    4
+    (Pdb) c
+    """
+
+
 def test_pdb_issue_20766():
     """Test for reference leaks when the SIGINT handler is set.
 
@@ -2185,7 +2211,7 @@ def test_relative_imports_on_plain_module(self):
 
     def test_errors_in_command(self):
         commands = "\n".join([
-            'print(',
+            'print(]',
             'debug print(',
             'debug doesnotexist',
             'c',
@@ -2194,7 +2220,8 @@ def test_errors_in_command(self):
 
         self.assertEqual(stdout.splitlines()[1:], [
             '-> pass',
-            '(Pdb) *** SyntaxError: \'(\' was never closed',
+            "(Pdb) *** SyntaxError: closing parenthesis ']' does not match opening "
+            "parenthesis '('",
 
             '(Pdb) ENTERING RECURSIVE DEBUGGER',
             '*** SyntaxError: \'(\' was never closed',

From 5aeb19da8ebb9970f7abbdb581c1233244564c13 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Sun, 9 Apr 2023 03:53:03 +0000
Subject: [PATCH 4/4] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Library/2023-04-09-03-53-02.gh-issue-103124.JspiNN.rst  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2023-04-09-03-53-02.gh-issue-103124.JspiNN.rst

diff --git a/Misc/NEWS.d/next/Library/2023-04-09-03-53-02.gh-issue-103124.JspiNN.rst b/Misc/NEWS.d/next/Library/2023-04-09-03-53-02.gh-issue-103124.JspiNN.rst
new file mode 100644
index 00000000000000..022524b369aa10
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-04-09-03-53-02.gh-issue-103124.JspiNN.rst
@@ -0,0 +1 @@
+Added multiline statement support for :mod:`pdb`

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