flac seems to write malformed AIFF-C, both none and sowt

In the course of testing input file handling after this one - used: 1.4.3 and including https://github.com/xiph/flac/actions/runs/12089446877 which I think is the most recent?

Running the following on the attached .flac:

flac --force-aiff-c-none-format -dfo aiffcnone.aiff short.flac
flac --force-aiff-c-sowt-format -dfo aiffcsowt.aiff short.flac

... gets me the two .aiff files in the attachment.

Then try flac --no-padding aiffc*.aiff :

WARNING: FORM chunk size of file aiffcnone.aiff does not agree with filesize
aiffcnone.aiff: wrote 2222 bytes, ratio=0,135
WARNING: FORM chunk size of file aiffcsowt.aiff does not agree with filesize
aiffcsowt.aiff: wrote 2222 bytes, ratio=0,135

With --keep-foreign-metadata-if-present added:

WARNING: FORM chunk size of file aiffcnone.aiff does not agree with filesize
aiffcnone.aiff: WARNING reading foreign metadata: invalid AIFF file: unexpected EOF (012)
aiffcnone.aiff: wrote 2306 bytes, ratio=0,140
WARNING: FORM chunk size of file aiffcsowt.aiff does not agree with filesize
aiffcsowt.aiff: WARNING reading foreign metadata: invalid AIFF file: unexpected EOF (012)
aiffcsowt.aiff: wrote 2306 bytes, ratio=0,140

aiffc.zip

Reproduce the issue with the two flac commands and the attached aiffc.zip files, then inspect the AIFF-C encoding and foreign-metadata handling paths. Done means both --force-aiff-c-none-format and --force-aiff-c-sowt-format produce AIFF-C files whose FORM chunk sizes match the file size and that can be read without the reported warnings.