id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
2563,"With -N4: ""internal error: RELEASE_LOCK: I do not own this lock: Task.c 269""",TomMD,,"The program crashes in various ways including double free (typical) and sigsegv (once when -N3).  The error in the subject was seen once (gdb output attached for that run).

compile: ghc -threaded -debug ex.hs --make -O2 -o ex

run: ./ex.hs +RTS -NX -RTS file1 file2 file3 file4
where X >= 3.

It might take 4 or 5 runs to crash.

For -N4 it typically complains about a double free error, but I saw the nicer error message once.",bug,closed,normal,6.10.1,Compiler,6.8.2,duplicate,,,Linux,x86_64 (amd64),,Unknown,,,,