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hush: fix handling of '' in ${var:+ARG}

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This wasn't an ash bug in dollar_altvalue9, it was hush bug (and bash!)

function                                             old     new   delta
expand_one_var                                      2236    2254     +18
expand_vars_to_list                                 1097    1103      +6
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 24/0)               Total: 24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-07-20 17:36:06 +02:00
parent 294eb4612c
commit 83e434d5b5
7 changed files with 217 additions and 3 deletions
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2
shell/ash_test/ash-quoting/dollar_altvalue9.right
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@@ -3,6 +3,7 @@ Unquoted 1:
|x y|
|1|
|2|
||
|1 2|
|A|
|B|
@@ -14,6 +15,7 @@ Unquoted 2:
|ax y|
|1|
|2|
||
|1 2|
|A|
|B|