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Wed, 13 Apr 2022 14:34:40 -0700 (PDT) MIME-Version: 1.0 From: Bart Schaefer Date: Wed, 13 Apr 2022 14:34:28 -0700 Message-ID: Subject: Boundary error in VCS_INFO_set --nvcs To: Zsh hackers list Content-Type: text/plain; charset="UTF-8" X-Seq: 50059 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: This output is from an older version of VCS_INFO but I don't see a diff that would have changed anything but line numbers: +vcs_info:52> VCS_INFO_set --nvcs +VCS_INFO_set:5> setopt localoptions noksharrays NO_shwordsplit +VCS_INFO_set:6> local -i i j +VCS_INFO_set:8> [[ --nvcs == --nvcs ]] +VCS_INFO_set:9> [[ '' == -preinit- ]] +VCS_INFO_set:10> i=0 +VCS_INFO_set:11> typeset -gx 'vcs_info_msg_0_=' +VCS_INFO_set:10> i=-1 +VCS_INFO_set:11> typeset -gx 'vcs_info_msg_-1_=' VCS_INFO_set:typeset:11: not valid in this context: vcs_info_msg_-1_ The problem is that when disable-patterns matches the current directory, vcs_info invokes VCS_INFO_set --nvcs, which hits this loop: if [[ $1 == '--nvcs' ]] ; then [[ $2 == '-preinit-' ]] && (( maxexports == 0 )) && (( maxexports = 1 )) for i in {0..$((maxexports - 1))} ; do Because $2 is not "-preeinit-", when maxexports is zero it is never reset to 1 and the "for" loop runs backwards to -1. I don't otherwise know how to reproduce the situation where VCS_INFO_maxexports is never called.