1 files changed, 26 insertions, 1 deletions
diff --git a/Python/ast.c b/Python/ast.c
index 3719332..dcaa697 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -4018,7 +4018,7 @@ ast_for_stmt(struct compiling *c, const node *n)
 }
 
 static PyObject *
-parsenumber(struct compiling *c, const char *s)
+parsenumber_raw(struct compiling *c, const char *s)
 {
     const char *end;
     long x;
@@ -4061,6 +4061,31 @@ parsenumber(struct compiling *c, const char *s)
 }
 
 static PyObject *
+parsenumber(struct compiling *c, const char *s)
+{
+    char *dup, *end;
+    PyObject *res = NULL;
+
+    assert(s != NULL);
+
+    if (strchr(s, '_') == NULL) {
+        return parsenumber_raw(c, s);
+    }
+    /* Create a duplicate without underscores. */
+    dup = PyMem_Malloc(strlen(s) + 1);
+    end = dup;
+    for (; *s; s++) {
+        if (*s != '_') {
+            *end++ = *s;
+        }
+    }
+    *end = '\0';
+    res = parsenumber_raw(c, dup);
+    PyMem_Free(dup);
+    return res;
+}
+
+static PyObject *
 decode_utf8(struct compiling *c, const char **sPtr, const char *end)
 {
     const char *s, *t;