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...the -ast-print options for a file that uses long double. The Basic/Targets.cpp file defined the x86 (and x86_64) long double type as APFloat::x87DoubleExtended. Then, when the AST printer try to write a long double literal value (using VisitFloatingLiteral()), it call FloatingLiteral- >getValueAsDouble() and the later does not support long double, so it try to call convertToDouble() as a fallback and crash due to an invalid assertion. APFloat.cpp:2631: failed assertion `semantics == (const llvm::fltSemantics*)&IEEEdouble' This is a know issue as some there is some comments like &q...

...r a file that uses long double. > > The Basic/Targets.cpp file defined the x86 (and x86_64) long double > type as APFloat::x87DoubleExtended. > Then, when the AST printer try to write a long double literal value > (using VisitFloatingLiteral()), it call FloatingLiteral- > >getValueAsDouble() and the later does not support long double, so > it try to call convertToDouble() as a fallback and crash due to an > invalid assertion. APFloat.cpp:2631: failed assertion `semantics == > (const llvm::fltSemantics*)&IEEEdouble' > > This is a know issue as some there...