Re: [Patch] trap: exit: invalid signal specification

As an example bash (v. 3.1.17) permits lowercase signal names but it converts 
this lowercase signal names into uppercase ones while interpreting the 
script. But for our "Turkish has 4 letter "I"s" problem this convert to 
uppercase one process fails but for bash invalid signal names not be 
considered a syntax error and do not cause the shell to abort. 

It is ``trap <action> <signal>'' so for the signal part this may be
right that this is made uppercase. But action is not modified I guess.
So it should be exit because there is no built-in named EXIT in
bash:

$ type exit
exit is a shell builtin
$ type EXIT
bash: type: EXIT: not found

So for me it does not seem to work:

$ trap 'err=$?; echo trap; EXIT $?' 0
$ exit 5
exit
trap
bash: EXIT: command not found
[1]    12906 exit 5     bash