Avoid returning a negative value from Field.get_linelen #638
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A sufficiently messed-up frame (e.g. a player skip) can cause the linelocs list to be non-monotonic. In PAL mode, ld-decode correctly reports the TBC failure, but then crashes because demod_pilot is empty. Fix this by returning the default line length if the length would otherwise be zero or negative.
happycube
approved these changes
May 1, 2021
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A sufficiently messed-up frame (e.g. a player skip) can cause the linelocs list to be non-monotonic. In PAL mode, ld-decode correctly reports the TBC failure, but then crashes because demod_pilot is empty. Fix this by returning the default line length if the length would otherwise be zero or negative.
Example (with -p) on SFTP: adamsampson/Faults/issue638/fawlty-skip.ldf