bcel version 5.2-7 failed to build with openjdk-7

During a rebuild test on precise with default-jdk switched to openjdk-7, a build failure was detected for bcel version 5.2-7.

See attached log for full build failure details.

This log snippet might also be of interest:

    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/util/Class2HTML.java:110: error: unmappable character for encoding ASCII
    [javac] if (argv[i].equals("-d")) { // Specify target directory, default `.?
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:38: error: unmappable character for encoding ASCII
    [javac] //Frames ?berpr?fen, die voreingestellte Gr??e haben
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:38: error: unmappable character for encoding ASCII
    [javac] //Frames ?berpr?fen, die voreingestellte Gr??e haben
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:38: error: unmappable character for encoding ASCII
    [javac] //Frames ?berpr?fen, die voreingestellte Gr??e haben
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:38: error: unmappable character for encoding ASCII
    [javac] //Frames ?berpr?fen, die voreingestellte Gr??e haben
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:39: error: unmappable character for encoding ASCII
    [javac] //Frames packen, die nutzbare bevorzugte Gr??eninformationen enthalten, z.B. aus ihrem Layout
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/GraphicalVerifier.java:39: error: unmappable character for encoding ASCII
    [javac] //Frames packen, die nutzbare bevorzugte Gr??eninformationen enthalten, z.B. aus ihrem Layout
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/statics/Pass2Verifier.java:1330: error: unmappable character for encoding ASCII
    [javac] * Conforming to: The Java Virtual Machine Specification, Second Edition, ?2.7, ?2.7.1, ?2.2.
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/statics/Pass2Verifier.java:1330: error: unmappable character for encoding ASCII
    [javac] * Conforming to: The Java Virtual Machine Specification, Second Edition, ?2.7, ?2.7.1, ?2.2.
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/statics/Pass2Verifier.java:1330: error: unmappable character for encoding ASCII
    [javac] * Conforming to: The Java Virtual Machine Specification, Second Edition, ?2.7, ?2.7.1, ?2.2.
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/structurals/InstConstraintVisitor.java:658: error: unmappable character for encoding ASCII
    [javac] // current class (?3.6), where the value of the index is (indexbyte1 << 8) | indexbyte2. The runtime constant
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/java/org/apache/bcel/verifier/structurals/InstConstraintVisitor.java:1641: error: unmappable character for encoding ASCII
    [javac] // current class (?3.6), where the value of the index is (indexbyte1 << 8) | indexbyte2. The runtime constant
    [javac] ^
    [javac] 25 errors

BUILD FAILED
/«PKGBUILDDIR»/build.xml:42: Compile failed; see the compiler error output for details.

Total time: 3 seconds
make: *** [debian/stamp-ant-build] Error 1
dpkg-buildpackage: error: debian/rules build gave error exit status 2
────────────────────────────────────────────────────────────────────────────────
Build finished at 20111109-1317

Finished
────────

E: Build failure (dpkg-buildpackage died)