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Escape square brackets in #2618

merged 1 commit into from Jan 9, 2019
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Just for now

@@ -275,7 +275,7 @@ test "$prefix" = NONE && prefix=$ac_default_prefix
test "$exec_prefix" = NONE && exec_prefix='${prefix}'
for name in $ac_subst_vars; do
for _ in 1 2 3; do
if printf '%s' "${name}" | egrep '^[_[:alpha:]][_[:alnum:]]*$'
if printf '%s' "${name}" | egrep '^[[_[[:alpha:]]]][[_[[:alnum:]]]]*$'
eval "${name}"="$(eval echo "\${${name}}")"
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