The search algorithm should inform the AI via debug logs if a case sensitivity issue occurs and the modification fails.

[maskelihileci]

App Version

3.20.3

API Provider

Human Relay Provider

Model Used

Gemini 2.5 Pro

🔁 Steps to Reproduce

<<<<<<< SEARCH
        DWORD originalStructRVA = pOriginalDataSection->VirtualAddress + offset;
        if (PatchedRva.count(originalStructRVA) || PatchedRva.count(originalStructRVA + 4) || PatchedRva.count(originalStructRVA + 8)) {
             continue;
        }
=======
        DWORD originalStructRVA = pOriginalDataSection->VirtualAddress + offset;
        if (PatchedRva.count(originalStructRVA) || PatchedRva.count(originalStructRVA + 4) || PatchedRva.count(originalStructRVA + 8)) {
             continue;
        }
>>>>>>> REPLACE

<error_details>
Diff 1 failed for file: 
Error: Search and replace content are identical - no changes would be made

Debug Info:
- Search and replace must be different to make changes
- Use read_file to verify the content you want to change

Suggested fixes:
1. Verify the search content exactly matches the file content (including whitespace)
2. Check for correct indentation and line endings
3. Use <read_file> to see the current file content
4. Consider breaking complex changes into smaller diffs
5. Ensure start_line parameter matches the actual content location

</error_details>

As shown in the example scenario, the variable "originalStructRva" was originally created in lowercase. The compiler throws an error here, and when the AI tries to fix it using its capabilities, it uses the SEARCH algorithm with uppercase.

The ROO CODE confirms this and finds the section it’s looking for, but when it attempts to modify it, it says the values are the same.

This happens because the AI knows that it needs to fix the case sensitivity issue to resolve the error, but it's not aware of this case difference when performing the search.

💥 Outcome Summary

💥 Outcome Summary
The AI attempted a search-and-replace fix for a variable name but failed because it didn’t detect a case-sensitive difference—the search and replacement content were identical except for case, which was not accounted for in the diff logic.

📄 Relevant Logs or Errors (Optional)

<error_details>
Diff 1 failed for file: PE-SECEXTD/pe_modifier.cpp
Error: Search and replace content are identical - no changes would be made

Debug Info:
- Search and replace must be different to make changes
- Use read_file to verify the content you want to change

Suggested fixes:
1. Verify the search content exactly matches the file content (including whitespace)
2. Check for correct indentation and line endings
3. Use <read_file> to see the current file content
4. Consider breaking complex changes into smaller diffs
5. Ensure start_line parameter matches the actual content location

</error_details>

[dosubot]

The Roo Code search-and-replace tool supports case sensitivity control, so you can configure it to ignore case when searching, which helps prevent issues where only the case differs between the search and replacement content. Regex patterns are case-sensitive by default, so make sure to set the appropriate option if you want case-insensitive matching. If a modification fails due to a case sensitivity mismatch, you can enable verbose diff debugging output in the settings to capture detailed logs about why the change was not applied—this can help the AI detect and report case sensitivity issues in the debug logs. For more, see the docs on case sensitivity in search and debug logging for diffs.

I didn’t find any documentation on how the Human Relay Provider or Gemini 2.5 Pro specifically interact with case sensitivity in search, but the above steps should address the core issue. If you need to verify the file content before and after, use the read_file tool as suggested in the error output.

To reply, just mention @dosu.

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[maskelihileci]

<error_details>
Diff 1 failed for file:
Error: Search and replace content are identical - no changes would be made

Debug Info:

• Search and replace must be different to make changes
• Use read_file to verify the content you want to change
• 🔍 Potential case mismatch: The variable or code fragment may differ only by uppercase/lowercase letters (e.g., originalStructRVA vs originalStructRva), which is not considered different in this search.
• Ensure exact case is used in search strings to locate the right section.

Suggested fixes:

1. Verify the search content exactly matches the file content (including whitespace and case)
2. Check for correct indentation and line endings
3. Use <read_file> to see the current file content
4. Consider breaking complex changes into smaller diffs
5. Ensure start_line parameter matches the actual content location

</error_details>

[vivekfyi]

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