On Fri, Nov 7, 2008 at 3:13 AM, Philip K.F. Hölzenspies
Dear Ian, all,
After the announcement, I downloaded and installed the final release of 6.10.1. At some prior stage, I used the RC1 release, which had the same bug, but I had generally assumed it to be an RC-phenomenon. Which bug? Well...
It seems editline has some incompatibility with my terminal. Maybe, I should configure something differently, but any and all of the control characters I type and work for all readline based (and all custom line-readers I have come across), but not for the new ghci. Most annoying is the fact that backspace doesn't work (instead, the control sequence ^? is printed and pressing enter results in "lexical error at character '\DEL'"). However, arrow keys (left ^[[D, up ^[[A, right ^[[C and down ^[[B) and common Ctrl+_ combinations (^d, ^e, ^a) also give similar errors. It is striking that the lexer does recognize them as the correct characters (printed error messages doe say \DEL, \EOT, \ENQ, etc).
I'm using xterm (X.Org 6.8.99.903(229)) on an OpenSuSE 10.3 system and the default termcap settings. Any clues? Is this bug known?
If the arrow keys don't work, it's a good sign that ghc just wasn't built with editline support. To build againt editline, you will probably need to install the libedit-devel package. Hope that helps, -Judah