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Revision 14716

lib/sh/util.sh: debugging: added pst() (print_stack_trace)

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util.sh
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pf() { declare -f "$@" >&"$debug_fd"; } # usage: pf func... # prints func decls
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pst() { print_stack_trace; } # no skip_stack_frame so know where called from
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# *note*: don't call from logging functions b/c will cause infinite recursion
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#### caching
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## shell-variable-based caching

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