commit 047ce8c452087809f5ab10d7a2ea58c8709a8da3
author Henry Schreiner <henry.fredrick.schreiner@cern.ch> Tue Jun 11 16:17:50 2019 -0400
committer Wenzel Jakob <wenzel.jakob@epfl.ch> Tue Jun 11 23:28:58 2019 +0200
tree 821f146c3536e624a73ea0fea8fc67f2ca929341
parent 95f750a87d82ad6b996ceae27e68737472ff4809

Fix iostream when used with nogil (#1368)

include/pybind11/iostream.h

diff --git a/include/pybind11/iostream.h b/include/pybind11/iostream.h
index 9119270..72baef8 100644
--- a/include/pybind11/iostream.h
+++ b/include/pybind11/iostream.h
@@ -43,8 +43,11 @@
             // This subtraction cannot be negative, so dropping the sign
             str line(pbase(), static_cast<size_t>(pptr() - pbase()));
 
-            pywrite(line);
-            pyflush();
+            {
+                gil_scoped_acquire tmp;
+                pywrite(line);
+                pyflush();
+            }
 
             setp(pbase(), epptr());
         }