Hi, I ran into some odd behavior when working on my cython-based project (h5py). The following cython code snippet is the culprit ("priv" is a function argument of type void**): cdef conv_size_t *sizes priv[0] = sizes = <conv_size_t*>malloc(sizeof(conv_size_t)) gets turned into this (with Cython 0.14.1): (__pyx_v_priv[0]) = ((__pyx_t_4h5py_5_conv_conv_size_t *)malloc((sizeof(__pyx_t_4h5py_5_conv_conv_size_t)))); __pyx_v_sizes = ((__pyx_t_4h5py_5_conv_conv_size_t *)malloc((sizeof(__pyx_t_4h5py_5_conv_conv_size_t)))); which leads to much head-scratching when one initializes "sizes", and then later tries to recover that value via "priv". Interestingly, Cython 0.13 correctly initializes both priv[0] and sizes to the same value: __pyx_t_5 = ((__pyx_t_4h5py_5_conv_conv_size_t *)malloc((sizeof(__pyx_t_4h5py_5_conv_conv_size_t)))); (__pyx_v_priv[0]) = __pyx_t_5; __pyx_v_sizes = __pyx_t_5; I wasn't able to find anything on this in the list archives or issue tracker. Right now I'm working around it by splitting the statement into multiple lines: sizes = <conv_size_t*>malloc(sizeof(conv_size_t)) priv[0] = sizes Andrew