Problem with IronJacamar .jar's

When I use various tools to manipulate AS jars, this happens with IronJacamar jars:

Caused by: java.util.zip.ZipException: invalid entry compressed size (expected 576 but got 577 bytes)
at java.util.zip.ZipOutputStream.closeEntry(ZipOutputStream.java:206)
at com.vladium.emma.instr.InstrProcessorST.writeZipEntry(InstrProcessorST.java:838)
at com.vladium.emma.instr.InstrProcessorST$EntryWriteJob.run(InstrProcessorST.java:905)
at com.vladium.emma.instr.InstrProcessorST.drainJobQueue(InstrProcessorST.java:943)
at com.vladium.emma.instr.InstrProcessorST.handleArchiveEnd(InstrProcessorST.java:353)
... 5 more

How are they packaged? Some special buggy tool?
It prevents me from preparing coverage reports, both Emma and JaCoco are affected.

STR:

1) Checkout and build AS7 master
2) wget --no-check-certificate https://repository.jboss.org/nexus/content/groups/developer/emma/emma/2.1.5320/emma-2.1.5320.jar -O emma.jar
3)

for i in `find $AS_DIR/modules/org/jboss/ -name '*.jar'`; do
  echo "============  $i"
  java -cp emma.jar emma instr -outmode overwrite -merge yes -instrpath $i;
done

Only IronJacamar jars cause problems, others are fine.