ADDITIONAL SYSTEM INFORMATION :
Issue seen on Windows 10, MacOs 15.* and Ubuntu.
Issue started with Java 22 and has persisted in Java 23 + Java 24. All distributions (OpenJDK, Oracle, Temurin)
Building with maven 3.9.9 and maven-compiler-plugin 3.14.0


A DESCRIPTION OF THE PROBLEM :
Building with maven 3.9.9 and maven-compiler-plugin 3.14.0 with sourceEncoding UTF-8.
Non-ascii class names builds OK, but non-ascii package names (Norwegian letters æøå) results in
* Error message: "import requires canonical name"
* Error message: "cannot find symbol" with garbled symbol and location (missing characters)

The code has built OK with Java 11 - Java 21, errors started only with Java 22 and continues in Java 24

Sample error messages
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/grensesnitt/Stønadsdager.java:[8,61] import requires canonical name for no.nav.foreldrepenger.stønadskon.o.regelmode.l.konfig.Parametertype
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/regelmodell/StønadskontoKontotype.java:[1,1] package no.nav.foreldrepenger.stønadskon.o.regelmodell clashes with class of same name
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/regelmodell/StønadskontoKontotype.java:[5,8] cannot find symbol
  symbol: class o.regelmodell
  location: package no.nav.foreldrepenger.stønadskon

 

REGRESSION : Last worked in version 21.0.7

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Clone public repository https://github.com/navikt/fp-stonadskonto and build using JDK 22, JDK 24
Altering java.version in pom will not change the situation

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Build OK (JDK 11 .. 21)
ACTUAL -
Many errors of type
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/grensesnitt/Stønadsdager.java:[8,61] import requires canonical name for no.nav.foreldrepenger.stønadskon.o.regelmode.l.konfig.Parametertype
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/regelmodell/StønadskontoKontotype.java:[1,1] package no.nav.foreldrepenger.stønadskon.o.regelmodell clashes with class of same name
[ERROR] /git/fp-stonadskonto/src/main/java/no/nav/foreldrepenger/stønadskonto/regelmodell/StønadskontoKontotype.java:[5,8] cannot find symbol
  symbol: class o.regelmodell
  location: package no.nav.foreldrepenger.stønadskon

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See code in https://github.com/navikt/fp-stonadskonto
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