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Subject: Re: "Invalid preceding regular expression" in <9d45jl$67c$1@akk3.akk.uni-karlsruhe.de>
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"Robin S. Socha" <robin@socha.net> writes:

> 
> Signaling: (invalid-regexp "Invalid preceding regular expression")
>   string-match("disco sucks f**k everything"

I believe your problem is that the regexp * operator can only apply to
constant-length subexpressions; In other words, the "f**" is invalid.
I'm not sure what your application is, but you might want to check out
`regexp-quote', or change the regexp to be like
"disco sucks f..k everything"...