Custom Query (361 matches)

When using ProofGeneral with XEmacs 21.4 and the CVS version of Isabelle, the following problem occurs: when stepping through a theory file using the "Next" button, ProofGeneral sometimes accidentaly resets itself when the cursor hits the bottom of the window in which the theory file is displayed, and XEmacs tries to scroll the text in the window. The effect of this bug is that the part of the theory file that was already processed is no longer coloured blue, and ProofGeneral's internal pointer indicating the next command to be processed is reset to the beginning of the theory file, causing the Isabelle process and ProofGeneral to get completely out of sync. In addition, the error message "(1) (error/warning) Error in 'post-command-hook' (setting hook to nil): (error Lisp nesting exceeds 'max-lisp-eval-depth')" is displayed. This problem does not occur with XEmacs 21.5, though.

ProofGeneral crashes while trying to display tracing messages produced by the prover. The problem occurs with both XEmacs 21.4 and 21.5. To reproduce the bug, try

lemma "True"

apply (tactic {* print_tac "test" *})

When trying to undo a diagnostic command (such as thm) occurring inside a proof, as in

lemma "True"
  apply (rule TrueI)
  thm TrueI

ProofGeneral crashes with the error message "wrong-type-argument char-or-string-p nil". The error occurs with both XEmacs 21.4 and 21.5.