Document the new fuel limit#3299
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SolalPirelli
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Apr 30, 2026
mbovel
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Apr 30, 2026
| For **Scala 3.9 and newer**: | ||
| - If you get a `StackOverflowError`, and you did **not** set `-Xmax-fuel`, nor any JVM option related to stack space (when running on the JVM), | ||
| yes, that's a compiler bug, because the compiler should run out of fuel before hitting a stack overflow. | ||
| Please [report it](https://github.com/scala/scala3/issues/new/choose). |
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I am still not convinced we can nor should make that promise.
Co-authored-by: Matt Bovel <matthieu@bovel.net>
SolalPirelli
commented
Apr 30, 2026
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Maybe "Compiling Deeply Nested Code" (the goal) would be a better title than "Fuel and Stack Overflows" (the means)? |
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@SethTisue good idea, done |
bishabosha
reviewed
May 12, 2026
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| For **Scala 3.9 and newer**: | ||
| - If you get a `StackOverflowError`, and you did **not** set `-Xmax-fuel`, nor any JVM option related to stack space (when running on the JVM), | ||
| yes, that's a compiler bug, because the compiler should run out of fuel before hitting a stack overflow. |
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everything that currently uses handleRecursive on main to catch stack overflow is being migrated to use the fuel, doesn't look like this includes parser files though? https://github.com/scala/scala3/pull/25937/changes
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