Use CyclicRef trace to pick sym in message [ci: last-only] #10680
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Dotty also has message about symbols involved in the cycle IIRC. This just uses IIRC here the lock/unlock are not symmetric? |
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I'm concerned about performance ( How about a single |
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it ought to be behind a diagnostic flag. is where I learned about |
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lrytz
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| val badsym = if (!sym.isSynthetic) sym else { | ||
| val organics = trace.filter(!_.isSynthetic) | ||
| if (organics.length == 0) sym |
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How about adding something to the error message here? $sym is synthetic; use -Vcyclic to find which definition needs an explicit type.
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-Vcyclicimproves reporting of "cyclic reference" errors.It enables "tracing" of symbol locking to show which symbols were involved in the cycle.
This is also helpful when a synthetic symbol name is reported, since that name is not meaningful.
Look for a non-synthetic symbol to blame.
Fixes scala/bug#7808