I'm training tesseract for a project. To make sure I understood the
training process, I ran it on a small training image. Generating
the .tr file went fine, with no errors beyond some "Unlabelled word"
warnings. From there I ran the rest of the training system and got a
small but working (i.e. I tested it with -l lang and it OCR'd stuff)
set of language files.

Fortified with confidence, I started over with a larger training
image. Same training results: nothing worse than "Unlabelled word"
warnings. But when I run mftraining on the resulting .tr file, it
crashes with:

Reading training-image.tr ...


Error: Illegal malloc request size!

Fatal error: No error trap defined!
Signal_termination_handler called with signal 2001
Writing Merged Microfeat ...

Can anyone fathom this issue? It makes no sense to me.
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