Javacpp-presets: "Error: Illegal Parameter specification!" in a Linux process invoking tesseract

[McAviti]

When calling the "api.GetUTF8Text()" I receive a SIGSEV, after the log:

Warning. Invalid resolution 0 dpi. Using 70 instead.

Error: Illegal Parameter specification!
A fatal error has been detected by the Java Runtime Environment:
"Fatal error encountered!" == nullptr:Error:Assert failed:in file globaloc.cpp, line 75

So it seems tesseract is invoked but then seems to have a problem with a parameter. (which one?)

• tried on two Linux machines, identical result
• tried with different languages
• tried with different LC_NUMERIC settings (some info in the internet suggest a problem with locales)
• works on Windows
• tesseract works fine using its binaries on the command line
• also tried with tess4J - there i receive SIGSEV as well, but without different log ("Tesseract couldn't load any languages!")

My config:

        <dependency>
            <groupId>org.bytedeco.javacpp-presets</groupId>
            <artifactId>tesseract-platform</artifactId>
            <version>4.0.0-beta.3-1.4.2</version>
        </dependency>

bash/:~$ tesseract -v
tesseract 4.0.0-beta.1
 leptonica-1.75.3
  libgif 5.1.4 : libjpeg 8d (libjpeg-turbo 1.5.2) : libpng 1.6.34 : libtiff 4.0.9 : zlib 1.2.11 : libwebp 0.6.1 : libopenjp2 2.3.0

 Found AVX
 Found SSE

OS: Ubuntu 18.04

Any help highly apprceiated - thanx!

[saudet]

Does the sample code in the README.file work?
https://github.com/bytedeco/javacpp-presets/tree/master/tesseract#sample-usage

[saudet]

Yeah, that's a known issue:
https://github.com/tesseract-ocr/tesseract/issues/1010#issuecomment-320521746
You'll need to set your locale to something else to make Tesseract happy.

[McAviti]

Thanks for directing me to the example, that was helpful.

It turned out that the example is runnable indeed, and then I could boil it down to that line:
api.SetPageSegMode(1);
mode 0 and 1 lead to a core dump, 2 or higher works.

I am not sure if this has something to do with the locale (tesseract internally), since I tried out a few variants, with no change to the problems. Additonally, the problem exists both on my workstation (locale de_AT) and the server (locale en_US).