The issue was detected with Valgrind.

Found by Valgrind.

Found by Valgrind.

Found by Valgrind.

Found by Valgrind.

Now we only allocate enough memory to exactly match the size of the
constructed string. Before, we were leaving some memory uninitialized
and overwriting the allocated memory in certain circum.

This allows us to free said view in the case of a syntax error. This
also allows us to get rid of a few places where we tried to clean up
the view ourselves in the parsing code.