Comment 11 for bug 1525682

The patch to fix this is at: http://patchwork.ozlabs.org/patch/556537/

Unfortunately it has just missed the cutoff to get into 2.5.0 (since it has been present since 2.4.0 and there is a workaround of running "/path/to/bash configure"). We'll put it into the next 2.5.x stable release, though.