busybox/shell/ash_test/ash-quoting/quote_in_varexp1.tests

x="''''"; echo "${x#"${x+''}"''}"
echo Ok:$?
ash: parser: Fix parameter expansion inside inner double quotes Upstream email: parser: Fix parameter expansion inside inner double quotes The parsing of parameter expansion inside inner double quotes breaks because we never look for ENDVAR while innerdq is true. echo "${x#"${x+''}"''} This patch fixes it by pushing the syntax stack if innerdq is true and we enter a new parameter expansion. This patch also fixes a corner case where a bad substitution error occurs within arithmetic expansion. Reported-by: Denys Vlasenko <vda.linux@googlemail.com> Fixes: ab1cecb40478 (" parser: Add syntax stack for recursive...") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta readtoken1 2880 2898 +18 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> 2018-04-03 00:30:59 +05:30			`x="''''"; echo "${x#"${x+''}"''}"`
			`echo Ok:$?`