Bug#866845: libidw-java FTBFS: PropertyMapImpl.java:383: error: unmappable character for encoding ASCII

[Adrian Bunk]

Source: libidw-java
Version: 1.6.1-1
Severity: serious
Tags: buster sid

Some recent change in unstable makes libidw-java FTBFS:

https://tests.reproducible-builds.org/debian/history/libidw-java.html
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/libidw-java.html

...
dh_auto_build: Compatibility levels before 9 are deprecated (level 8 in use)
   jh_build
find src -name *.java -and -type f -print0 | xargs -s 512000 -0 /usr/lib/jvm/default-java/bin/javac -g -cp :debian/_jh_build.idw -d debian/_jh_build.idw -source 1.7 -target 1.7
warning: [options] bootstrap class path not set in conjunction with -source 1.7
src/net/infonode/properties/propertymap/PropertyMapImpl.java:383: error: unmappable character for encoding ASCII
      throw new RuntimeException("Property group '" + propertyObjectImpl.propertyGroup + "?' can't be assigned to group '" + propertyGroup + "'!");
                                                                                          ^
1 error
1 warning
debian/rules:9: recipe for target 'build' failed
make: *** [build] Error 123