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Unknown launch mode: a dash word with a quoted variable reports the raw variable text as an exact value #245
Description
Problem
In the Unknown initial state mode, Parse reports an exact value that contains raw variable text, for a dash word that holds a quoted variable.
| Source | SST value (Unknown mode) | bash argv |
|---|---|---|
for n in a x; do tool -o"$n"; done |
Exact { -o$n } |
-oa, -ox |
for n in a; do git -C"$n" status; done |
Exact { -C$n } |
-Ca |
The same happens with -xo"$n", -o"${n}", and -o"$n"x. The Fresh and Isolated modes give the correct values. The base commit d197ba3 (0.4.0-beta.21) has the bug too.
Impact
- A consumer gets a wrong exact value. A path check or a value check can see
-o$nand not the real value. - PR Add literal twins of Bash loop values #242 (literal twins) gives no twins in
Unknownmode for this reason.
Expected
- In
Unknownmode, the value of such a word isUnknown, or it is the correct value set. - Add tests that compare the value with real bash.
Found by the verification of PR #242 (scratchpad probe twinprobe3).
Activity
Give no exact value to an option word with an unproved expansion
Give no exact value to an option word with an unproved expansion