http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53982
--- Comment #2 from Daniel Schepler <dschepler at gmail dot com> 2012-07-16 15:53:41 UTC --- (In reply to comment #1) > Please show us how to reproduce it. I assume you mean the heap corruption issue in ecj1? To pick a Debian package at random which is running into this... download the source package from http://ftp.egr.msu.edu/debian/pool/main/libj/libjpedal-jbig2-java/libjpedal-jbig2-java_20100117.orig.tar.gz and unpack. Then run gcj -C -Wall `find org -name *.java | LC_COLLATE=C sort` Here, the output ends with org/jpedal/jbig2/decoders/MMRDecoder.java:189: warning: The declared exception IOException is not acecj1: arena.c:661: heap_trim: Assertion `p->size == (0|0x1)' failed. gcj: internal compiler error: Aborted (program ecj1) Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcj-4.7/README.Bugs> for instructions.