Fix iostream when used with nogil (#1368)

047ce8c4 · Henry Schreiner · Wenzel Jakob · 95f750a8 · 047ce8c4
Commit 047ce8c4 authored Jun 11, 2019 by Henry Schreiner Committed by Wenzel Jakob Jun 11, 2019
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include/pybind11/iostream.h include/pybind11/iostream.h +5 -2

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--- a/include/pybind11/iostream.h
+++ b/include/pybind11/iostream.h
@@ -43,8 +43,11 @@ private:
            // 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());
        }