id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
4164	stm-2.1.2.0 build failure on GHC < 6.10	j3h		"{{{
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.10.4
$ cabal install stm-2.1.2.0
Resolving dependencies...
Configuring stm-2.1.2.0...
Preprocessing library stm-2.1.2.0...
Building stm-2.1.2.0...
[1 of 7] Compiling Control.Sequential.STM ( Control/Sequential/STM.hs, dist/build/Control/Sequential/STM.o )
[2 of 7] Compiling Control.Monad.STM ( Control/Monad/STM.hs, dist/build/Control/Monad/STM.o )
[3 of 7] Compiling Control.Concurrent.STM.TMVar ( Control/Concurrent/STM/TMVar.hs, dist/build/Control/Concurrent/STM/TMVar.o )
[4 of 7] Compiling Control.Concurrent.STM.TChan ( Control/Concurrent/STM/TChan.hs, dist/build/Control/Concurrent/STM/TChan.o )
[5 of 7] Compiling Control.Concurrent.STM.TVar ( Control/Concurrent/STM/TVar.hs, dist/build/Control/Concurrent/STM/TVar.o )

Control/Concurrent/STM/TVar.hs:22:8: Not in scope: `readTVarIO'
cabal: Error: some packages failed to install:
stm-2.1.2.0 failed during the building phase. The exception was:
ExitFailure 1
}}}

The same build failure occurs on GHC 6.8

stm-2.1.1.2 or earlier installs successfully with GHC < 6.12.

This build failure results from the addition of readTVarIO from GHC.Conc to the API, with no compatibility API or constraint on the version of base.

Is this the right place to report STM bugs?"	bug	closed	normal		libraries (other)		fixed	stm GHC.Conc readTVarIO	atte.hinkka@… karel.piwko@…	Unknown/Multiple	Unknown/Multiple	None/Unknown