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Backport "Add debugger tip to section "Trace a Tree Creation Site" of the contributing guide" to LTS #19050

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Dec 8, 2023
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Backport "Add debugger tip to section "Trace a Tree Creation Site" of the contributing guide" to LTS #19050

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Add debugger tip to section "Trace a Tree Creation Site" of the contr…
Sporarum Jun 29, 2023
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Fix cause.md
Sporarum Jun 29, 2023
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3 changes: 3 additions & 0 deletions docs/_docs/contributing/issues/cause.md
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Expand Up @@ -38,6 +38,9 @@ the tree was generated by looking for its unique ID, and then generating a stack
3. Run the compiler with `-Ydebug-tree-with-id <tree-id>` flag. The compiler will print a stack trace
pointing to the creation site of the tree with the provided ID.

If you are using a debugger, you can add a breakpoint after `if ownId == debugId then` in method `allocateId` of `Positioned.scala` (you will still need the flag), this will allow you to navigate the stack with more ease.
Do not use a conditional breakpoint, the time overhead is very significant for a method called as often as this one.

### Enhanced Tree Printing

As seen above `-Xprint:<phase>` can be enhanced with further configuration flags, found in
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