Error instead of crash when generating trees referring to skolems #24380
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odersky
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Nov 13, 2025
Previously, the valueOf inline call succeeded (because the ValueOf synthesizer calls `tpd.ref` which calls `tpd.singleton`), leading to an invalid tree which crashed in the backend with: "assertion failed: Cannot create ClassBType from NoSymbol". Fixed by throwing a TypeError from `tpd.singleton`, unfortunatley this means tests/neg/i8623.scala gets a worse error message because the implicit search fails early, but arguably this is more correct.
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Previously, the valueOf inline call succeeded (because the ValueOf synthesizer calls
refwhich callssingleton), leading to an invalid tree which crashed in the backend with: "assertion failed: Cannot create ClassBType from NoSymbol"