[Python-checkins] [2.7] bpo-38535: Fix positions for AST nodes for calls without arguments in decorators. (GH-16861). (GH-16931)

[Serhiy Storchaka]

https://github.com/python/cpython/commit/493fef60a7600f83fe6916ed89d0fb0c0aab484d
commit: 493fef60a7600f83fe6916ed89d0fb0c0aab484d
branch: 2.7
author: Serhiy Storchaka <storchaka at gmail.com>
committer: GitHub <noreply at github.com>
date: 2019-10-26T17:30:30+03:00
summary:

[2.7] bpo-38535: Fix positions for AST nodes for calls without arguments in decorators. (GH-16861). (GH-16931)

(cherry picked from commit 26ae9f6d3d755734c9f371b9356325afe5764813)

files:
A Misc/NEWS.d/next/Core and Builtins/2019-10-20-12-43-48.bpo-38535.ESMkVN.rst
M Lib/test/test_ast.py
M Python/ast.c

diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 0a1ca4168a590..3cfe6188ac134 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -103,6 +103,12 @@ def to_tuple(t):
     "{r for l in x if g}",
     # setcomp with naked tuple
     "{r for l,m in x}",
+    # Decorated FunctionDef
+    "@deco1\n at deco2()\n at deco3(1)\ndef f(): pass",
+    # Decorated ClassDef
+    "@deco1\n at deco2()\n at deco3(1)\nclass C: pass",
+    # Decorator with generator argument
+    "@deco(a for a in b)\ndef f(): pass",
 ]
 
 # These are compiled through "single"
@@ -546,6 +552,9 @@ def main():
 ('Module', [('Expr', (1, 0), ('DictComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'v', ('Store',)), ('Name', (1, 13), 'w', ('Store',))], ('Store',)), ('Name', (1, 18), 'x', ('Load',)), [])]))]),
 ('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 12), 'x', ('Load',)), [('Name', (1, 17), 'g', ('Load',))])]))]),
 ('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7), [('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 9), 'm', ('Store',))], ('Store',)), ('Name', (1, 14), 'x', ('Load',)), [])]))]),
+('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Pass', (4, 9))], [('Name', (1, 1), 'deco1', ('Load',)), ('Call', (2, 1), ('Name', (2, 1), 'deco2', ('Load',)), [], [], None, None), ('Call', (3, 1), ('Name', (3, 1), 'deco3', ('Load',)), [('Num', (3, 7), 1)], [], None, None)])]),
+('Module', [('ClassDef', (1, 0), 'C', [], [('Pass', (4, 9))], [('Name', (1, 1), 'deco1', ('Load',)), ('Call', (2, 1), ('Name', (2, 1), 'deco2', ('Load',)), [], [], None, None), ('Call', (3, 1), ('Name', (3, 1), 'deco3', ('Load',)), [('Num', (3, 7), 1)], [], None, None)])]),
+('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Pass', (2, 9))], [('Call', (1, 1), ('Name', (1, 1), 'deco', ('Load',)), [('GeneratorExp', (1, 6), ('Name', (1, 6), 'a', ('Load',)), [('comprehension', ('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 17), 'b', ('Load',)), [])])], [], None, None)])]),
 ]
 single_results = [
 ('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-10-20-12-43-48.bpo-38535.ESMkVN.rst b/Misc/NEWS.d/next/Core and Builtins/2019-10-20-12-43-48.bpo-38535.ESMkVN.rst
new file mode 100644
index 0000000000000..7671fd06474ba
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-10-20-12-43-48.bpo-38535.ESMkVN.rst	
@@ -0,0 +1,2 @@
+Fixed line numbers and column offsets for AST nodes for calls without
+arguments in decorators.
diff --git a/Python/ast.c b/Python/ast.c
index 946032589f4b0..10571a3ec2428 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -852,8 +852,9 @@ ast_for_decorator(struct compiling *c, const node *n)
         name_expr = NULL;
     }
     else if (NCH(n) == 5) { /* Call with no arguments */
-        d = Call(name_expr, NULL, NULL, NULL, NULL, LINENO(n),
-                 n->n_col_offset, c->c_arena);
+        d = Call(name_expr, NULL, NULL, NULL, NULL,
+                 name_expr->lineno, name_expr->col_offset,
+                 c->c_arena);
         if (!d)
             return NULL;
         name_expr = NULL;