Build Failure #2
Description
$ cabal v2-build
src/Language/VintageBasic/Interpreter.hs:354:17: error:
• No instance for (Control.Monad.Fail.MonadFail
(Control.Monad.CPST.CPST (Excep Result BasicRT ()) BasicRT))
arising from a do statement
with the failable pattern ‘(FloatVal index)’
• In a stmt of a 'do' block:
(FloatVal index) <- getScalarVar control
In the expression:
do (FloatVal index) <- getScalarVar control
let index' = index + step
setScalarVar control (FloatVal index')
if (step >= 0 && index' <= lim) || (step < 0 && index' >= lim) then
continue True
else
resume False
In the expression:
if isNext x || isNextVar control x then
do (FloatVal index) <- getScalarVar control
let index' = ...
setScalarVar control (FloatVal index')
....
else
passOn True
|
354 | (FloatVal index) <- getScalarVar control
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[16 of 18] Compiling Language.VintageBasic.Parser ( src/Language/VintageBasic/Parser.hs, dist/build/vintbas/vintbas-tmp/Language/VintageBasic/Parser.o )
$ cabal --version
cabal-install version 2.4.0.0
compiled using version 2.4.0.1 of the Cabal library