Error if byte-compiling a form hasn't wrapped byte-compile-inbuffer. lisp/ChangeLog addition: 2011-09-09 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el (byte-compile-from-buffer): If compiling a form has changed the current buffer (that is, some eval-when-compile form hasn't done save-excursion when appropriate), error and exit; we can't guarantee we'll give useful code in that context. See http://mid.gmane.org/20110909110831.GD2875@acm.acm and related discussion.

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