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bpo-33132: Fix reference counting issues in the compiler. (GH-6209)

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(cherry picked from commit a95d98607e)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2018-03-24 14:27:06 -07:00 • committed by GitHub
parent 42bd62bc87
commit 471364b4d9
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 19 deletions
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31
Python/compile.c
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@ -2808,9 +2808,7 @@ static int
compiler_from_import(struct compiler *c, stmt_ty s)
{
Py_ssize_t i, n = asdl_seq_LEN(s->v.ImportFrom.names);
PyObject *names = PyTuple_New(n);
PyObject *level;
PyObject *level, *names;
static PyObject *empty_string;
if (!empty_string) {
@ -2819,14 +2817,15 @@ compiler_from_import(struct compiler *c, stmt_ty s)
return 0;
}
if (!names)
return 0;
level = PyLong_FromLong(s->v.ImportFrom.level);
if (!level) {
Py_DECREF(names);
return 0;
}
ADDOP_N(c, LOAD_CONST, level, consts);
names = PyTuple_New(n);
if (!names)
return 0;
/* build up the names */
for (i = 0; i < n; i++) {
@ -2837,16 +2836,12 @@ compiler_from_import(struct compiler *c, stmt_ty s)
if (s->lineno > c->c_future->ff_lineno && s->v.ImportFrom.module &&
_PyUnicode_EqualToASCIIString(s->v.ImportFrom.module, "__future__")) {
Py_DECREF(level);
Py_DECREF(names);
return compiler_error(c, "from __future__ imports must occur "
"at the beginning of the file");
}
ADDOP_N(c, LOAD_CONST, names, consts);
ADDOP_O(c, LOAD_CONST, level, consts);
Py_DECREF(level);
ADDOP_O(c, LOAD_CONST, names, consts);
Py_DECREF(names);
if (s->v.ImportFrom.module) {
ADDOP_NAME(c, IMPORT_NAME, s->v.ImportFrom.module, names);
}
@ -2869,7 +2864,6 @@ compiler_from_import(struct compiler *c, stmt_ty s)
store_name = alias->asname;
if (!compiler_nameop(c, store_name, Store)) {
Py_DECREF(names);
return 0;
}
}
@ -4687,10 +4681,6 @@ compiler_annassign(struct compiler *c, stmt_ty s)
if (s->v.AnnAssign.simple &&
(c->u->u_scope_type == COMPILER_SCOPE_MODULE ||
c->u->u_scope_type == COMPILER_SCOPE_CLASS)) {
mangled = _Py_Mangle(c->u->u_private, targ->v.Name.id);
if (!mangled) {
return 0;
}
if (c->c_future->ff_features & CO_FUTURE_ANNOTATIONS) {
VISIT(c, annexpr, s->v.AnnAssign.annotation)
}
@ -4698,8 +4688,11 @@ compiler_annassign(struct compiler *c, stmt_ty s)
VISIT(c, expr, s->v.AnnAssign.annotation);
}
ADDOP_NAME(c, LOAD_NAME, __annotations__, names);
ADDOP_O(c, LOAD_CONST, mangled, consts);
Py_DECREF(mangled);
mangled = _Py_Mangle(c->u->u_private, targ->v.Name.id);
if (!mangled) {
return 0;
}
ADDOP_N(c, LOAD_CONST, mangled, consts);
ADDOP(c, STORE_SUBSCR);
}
break;