Bug #1588287: fix invalid assertion for `1,2` in debug builds.
Will backport
diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py
index 69e1980..14ce7e4 100644
--- a/Lib/test/test_grammar.py
+++ b/Lib/test/test_grammar.py
@@ -747,6 +747,8 @@
x = `x`
x = `1 or 2 or 3`
+ self.assertEqual(`1,2`, '(1, 2)')
+
x = x
x = 'x'
x = 123
diff --git a/Misc/NEWS b/Misc/NEWS
index 2ed9371..0527d83 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
Core and builtins
-----------------
+- Bug #1588287: fix invalid assertion for `1,2` in debug builds.
+
- Bug #1576657: when setting a KeyError for a tuple key, make sure that
the tuple isn't used as the "exception arguments tuple".
diff --git a/Python/ast.c b/Python/ast.c
index f490268..dcf7f2b 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -532,6 +532,7 @@
|| TYPE(n) == listmaker
|| TYPE(n) == testlist_gexp
|| TYPE(n) == testlist_safe
+ || TYPE(n) == testlist1
);
seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena);