** Summary changed: - tcsh corrupts its command history list after random number of commands executed + tcsh corrupts its command history list when history modifiers are used
** Description changed: tcsh maintains a history list of the most recent $history commands - executed. The history becomes corrupted after a number of commands have - been executed. When this happens, the history list is cut off at a - random position, showing only a subset of the oldest commands in the - history list, discarding the newer commands which were in the history - list, and the history list is no longer updated with any newly executed - commands. There is no clear trigger for when the history gets corrupted. - It can happen after executing only 8 commands or after more than a - hundred. It is possibly triggered by using history modifiers e.g. !$:r - and !$:t. + executed. The history becomes corrupted after a number of commands with + history modifiers have been executed. When this happens, the history + list is cut off at a random position, showing only a subset of the + oldest commands in the history list, discarding the newer commands which + were in the history list, and the history list is no longer updated with + any newly executed commands. The trigger is to keep using commands with + history modifiers e.g. !$:r and !$:t and eventually the history + corruption will happen. - The history list used to work fine in old versions of tcsh somewhere - around version 6.10/11/12, but all recent versions of tcsh have the bug. - This bug exists in, for example, 6.17.06-2 (amd64) from Ubuntu 12.04 - Precise and all previous versions back at least as far as 10.04 Lucid. + The history list and history modifiers used to work fine in old versions + of tcsh somewhere around version 6.10/11/12, but all recent versions of + tcsh have the bug. This bug exists in, for example, 6.17.06-2 (amd64) + from Ubuntu 12.04 Precise and all previous versions back at least as far + as 10.04 Lucid. Clearing and resetting the history using the history variable does not - solve the problem. The only solution is to restart tcsh, e.g. exec tcsh. + solve the problem. The only solution is to quit and restart tcsh, e.g. + exec tcsh. The history list is essential for proper use of an interactive shell. Without it, tcsh is almost completely useless as an interactive shell. This is a really serious bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1103237 Title: tcsh corrupts its command history list when history modifiers are used To manage notifications about this bug go to: https://bugs.launchpad.net/tcsh/+bug/1103237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
