Cross platform repeatable RTS
This bug seems to be reproducible on Linux, Windows, and OpenBSD, at least.
In the included package, run ./build.sh, which will build and run a program as follows:
ghc -lz -threaded --make unstuff.hs -o unstuff ./unstuff trace.dat
The program forks a lot of OS threads. After several seconds of running, it dies with:
unstuff: user error (ORANGE ALERT: 0s, 4s, SrvServerInfo, ix1: 6, size: 49722) unstuff: internal error: scavenge_stack: weird activation record found on stack: 64384 Please report this as a bug to email@example.com, or http://www.sourceforge.net/projects/ghc/
The first message is simply an error printed by the program reporting that it took too long to compute a result.