BUG: linalg: do not assume that GIL is enabled in xerbla_

With the new ufunc-based linalg, GIL is released in ufuncs, and needs to
be reacquired when raising errors in xerbla_.

1 files changed, 4 insertions, 0 deletions

diff --git a/numpy/linalg/lapack_lite/python_xerbla.c b/numpy/linalg/lapack_lite/python_xerbla.c
index 4e5a68413..8bd069842 100644
--- a/numpy/linalg/lapack_lite/python_xerbla.c
+++ b/numpy/linalg/lapack_lite/python_xerbla.c
@@ -26,12 +26,16 @@ int xerbla_(char *srname, integer *info)
                                  6 for name, 4 for param. num. */
 
         int len = 0; /* length of subroutine name*/
+        PyGILState_STATE save;
+
         while( len<6 && srname[len]!='\0' )
                 len++;
         while( len && srname[len-1]==' ' )
                 len--;
 
         snprintf(buf, sizeof(buf), format, len, srname, *info);
+        save = PyGILState_Ensure();
         PyErr_SetString(PyExc_ValueError, buf);
+        PyGILState_Release(save);
         return 0;
 }