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-rw-r--r--src/if_py_both.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/src/if_py_both.h b/src/if_py_both.h
index c44fc93acb..4cd373402c 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -5619,6 +5619,7 @@ run_do(const char *cmd, void *arg UNUSED
int status;
PyObject *pyfunc, *pymain;
PyObject *run_ret;
+ buf_T *was_curbuf = curbuf;
if (u_save((linenr_T)RangeStart - 1, (linenr_T)RangeEnd + 1) != OK)
{
@@ -5671,7 +5672,9 @@ run_do(const char *cmd, void *arg UNUSED
#ifdef PY_CAN_RECURSE
*pygilstate = PyGILState_Ensure();
#endif
- if (!(line = GetBufferLine(curbuf, lnum)))
+ /* Check the line number, the command my have deleted lines. */
+ if (lnum > curbuf->b_ml.ml_line_count
+ || !(line = GetBufferLine(curbuf, lnum)))
goto err;
if (!(linenr = PyInt_FromLong((long) lnum)))
{
@@ -5684,9 +5687,19 @@ run_do(const char *cmd, void *arg UNUSED
if (!ret)
goto err;
+ /* Check that the command didn't switch to another buffer. */
+ if (curbuf != was_curbuf)
+ {
+ Py_XDECREF(ret);
+ goto err;
+ }
+
if (ret != Py_None)
if (SetBufferLine(curbuf, lnum, ret, NULL) == FAIL)
+ {
+ Py_XDECREF(ret);
goto err;
+ }
Py_XDECREF(ret);
PythonIO_Flush();