work around more zsh bugs w.r.t. local traps

internal/p10k.zsh

@@ -6428,7 +6428,7 @@ _p9k_precmd() {
   __p9k_new_status=$?
   __p9k_new_pipestatus=($pipestatus)
 
-  trap "" INT
+  trap ":" INT
 
   [[ -o ksh_arrays ]] && __p9k_ksh_arrays=1 || __p9k_ksh_arrays=0
   [[ -o sh_glob ]] && __p9k_sh_glob=1 || __p9k_sh_glob=0

powerlevel10k.zsh-theme

@@ -19,9 +19,11 @@
 
 (( $+__p9k_root_dir )) || typeset -gr __p9k_root_dir=${POWERLEVEL9K_INSTALLATION_DIR:-${${(%):-%x}:A:h}}
 (( $+__p9k_intro )) || {
-  # Note: leading spaces before `local` are important. Otherwise Antigen will remove `local` (!!!).
+  # Leading spaces before `local` are important. Otherwise Antigen will remove `local` (!!!).
+  # __p9k_trapint is to work around bugs in zsh: https://www.zsh.org/mla/workers/2020/msg00612.html.
+  # Likewise for `trap ":"` instead of the plain `trap ""`.
   typeset -gr __p9k_intro_base='emulate -L zsh -o no_hist_expand -o extended_glob -o no_prompt_bang -o prompt_percent -o no_prompt_subst -o no_aliases -o no_bg_nice -o typeset_silent
-  trap "" INT
+  trap ":" INT
   trap "trap ${(q)__p9k_trapint:--} INT" EXIT
   local -a match mbegin mend
   local -i MBEGIN MEND OPTIND