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This repository was archived by the owner on May 15, 2026. It is now read-only.
Command validation fails with 'Bad substitution' error on shell array indexing #3529
Description
When using shell array indexing expressions like ${array[var]}, command validation fails with error:
Bad substitution: levels[31224
This occurs when trying to validate shell commands that use array indexing with variables, such as:
level=${levels[30232 % ${#levels[@]}]}The error is thrown by the shell-quote library when parsing these expressions.
Reacted by dosubot
Activity
dosubot commentedon May 13, 2025
I couldn't find specific information on how Roo Code's command validation handles shell array indexing or the "Bad substitution" error in the documentation. However, it seems that the issue might be related to how the
shell-quotelibrary parses these expressions. You might want to check if there are any open issues or discussions related to this in the repository. Additionally, consider looking into alternative ways to handle array indexing or variable substitution that might be compatible with the current parsing logic.To continue talking to Dosu, mention @dosu.
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KJ7LNW commentedon May 13, 2025
Created upstream issue in shell-quote repository: ljharb/shell-quote#19
The issue appears to be in the shell-quote library's handling of nested parameter expansion inside array indexing expressions. Added a minimal reproducer showing the specific parsing failure.