fix: box string argument in compileSymbolLiteral before InvokeExternal#301
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compileSymbolLiteral was pushing a raw BuiltinValue string directly
as an argument, but InvokeExternal expects boxed $Value? arguments.
This caused a runtime type cast error ('String' is not a subtype of
'$Value?'). Added .boxIfNeeded(ctx) to wrap the string before
.pushArg(ctx).
Also adds symbol_test.dart covering simple, dotted, private, and
comparison symbol literal cases.
Zverik
approved these changes
Apr 28, 2026
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Fixes symbol compilation by boxing the string argument before InvokeExternal.