Package: libnetpbm10-dev
Version: 2:10.0-11
In lines 68--70 of libpnm3.c, obviously some parentheses are missing;
e.g., line 68 is:
PPM_GETR(ul) + PPM_GETR(ur) + PPM_GETR(ll) + PPM_GETR(lr) / 4,
but should be:
( PPM_GETR(ul) + PPM_GETR(ur) + PPM_GETR(ll) + PPM_GETR(lr) ) / 4,
otherwise, the value calculated is not a proper average.
This bug manifests shows up in pnmcrop -sides reporting a nonsensical
background colour value.
The same error is in lines 123--124.
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