http://bugs.gentoo.org/287725 fix from upstream --- netpbm/converter/other/pngx.c (revision 1021) +++ netpbm/converter/other/pngx.c (revision 1022) @@ -69,6 +69,7 @@ else *pngxPP = pngxP; } + pngxP->rw = rw; } } @@ -77,7 +78,14 @@ void pngx_destroy(struct pngx * const pngxP) { - png_destroy_write_struct(&pngxP->png_ptr, &pngxP->info_ptr); + switch(pngxP->rw) { + case PNGX_READ: + png_destroy_read_struct(&pngxP->png_ptr, &pngxP->info_ptr, NULL); + break; + case PNGX_WRITE: + png_destroy_write_struct(&pngxP->png_ptr, &pngxP->info_ptr); + break; + } free(pngxP); } --- netpbm/converter/other/pngx.h (revision 1021) +++ netpbm/converter/other/pngx.h (revision 1022) @@ -5,14 +5,14 @@ the PNG library easier and cleaner. */ +typedef enum {PNGX_READ, PNGX_WRITE} pngx_rw; + struct pngx { png_structp png_ptr; - png_infop info_ptr; + png_infop info_ptr; + pngx_rw rw; }; -typedef enum {PNGX_READ, PNGX_WRITE} pngx_rw; - - void pngx_create(struct pngx ** const pngxPP, pngx_rw const rw,