Resolving dependencies... Starting abstract-par-0.3.3 Starting cereal-0.5.8.1 Starting base-orphans-0.8.4 Starting base-compat-0.11.2 Building abstract-par-0.3.3 Building cereal-0.5.8.1 Building base-orphans-0.8.4 Building base-compat-0.11.2 Completed abstract-par-0.3.3 Starting data-default-class-0.1.2.0 Building data-default-class-0.1.2.0 Completed data-default-class-0.1.2.0 Starting dlist-1.0 Building dlist-1.0 Completed base-orphans-0.8.4 Starting hashable-1.3.2.0 Building hashable-1.3.2.0 Completed base-compat-0.11.2 Starting indexed-traversable-0.1.1 Building indexed-traversable-0.1.1 Completed cereal-0.5.8.1 Starting integer-logarithms-1.0.3.1 Building integer-logarithms-1.0.3.1 Completed dlist-1.0 Starting parallel-3.2.2.0 Building parallel-3.2.2.0 Completed integer-logarithms-1.0.3.1 Starting primitive-0.7.1.0 Completed hashable-1.3.2.0 Starting splitmix-0.1.0.3 Building primitive-0.7.1.0 Building splitmix-0.1.0.3 Completed parallel-3.2.2.0 Starting tagged-0.8.6.1 Completed indexed-traversable-0.1.1 Starting th-abstraction-0.4.2.0 Building tagged-0.8.6.1 Building th-abstraction-0.4.2.0 Completed splitmix-0.1.0.3 Starting transformers-compat-0.6.6 Building transformers-compat-0.6.6 Completed tagged-0.8.6.1 Starting base-compat-batteries-0.11.2 Building base-compat-batteries-0.11.2 Completed transformers-compat-0.6.6 Starting unordered-containers-0.2.14.0 Completed th-abstraction-0.4.2.0 Starting time-compat-1.9.6 Building unordered-containers-0.2.14.0 Building time-compat-1.9.6 Completed base-compat-batteries-0.11.2 Starting data-fix-0.3.1 Building data-fix-0.3.1 Completed time-compat-1.9.6 Starting async-2.2.3 Building async-2.2.3 Completed primitive-0.7.1.0 Starting random-1.2.0 Building random-1.2.0 Completed data-fix-0.3.1 Starting distributive-0.6.2.1 Building distributive-0.6.2.1 Completed async-2.2.3 Starting vector-0.12.3.0 Building vector-0.12.3.0 Completed distributive-0.6.2.1 Starting scientific-0.3.7.0 Building scientific-0.3.7.0 Completed unordered-containers-0.2.14.0 Starting comonad-5.0.8 Building comonad-5.0.8 Completed random-1.2.0 Starting uuid-types-1.0.5 Building uuid-types-1.0.5 Completed scientific-0.3.7.0 Starting monad-par-extras-0.3.3 Building monad-par-extras-0.3.3 Completed comonad-5.0.8 Starting abstract-deque-0.3 Building abstract-deque-0.3 Completed uuid-types-1.0.5 Starting attoparsec-0.14.1 Building attoparsec-0.14.1 Completed monad-par-extras-0.3.3 Starting bifunctors-5.5.11 Completed abstract-deque-0.3 Building bifunctors-5.5.11 Completed attoparsec-0.14.1 Completed bifunctors-5.5.11 Starting assoc-1.0.2 Building assoc-1.0.2 Completed assoc-1.0.2 Starting these-1.1.1.1 Building these-1.1.1.1 Completed these-1.1.1.1 Starting strict-0.4.0.1 Building strict-0.4.0.1 Completed strict-0.4.0.1 Completed vector-0.12.3.0 Starting vector-binary-instances-0.2.5.2 Starting vector-algorithms-0.8.0.4 Starting vector-th-unbox-0.2.1.9 Starting math-functions-0.3.4.2 Building vector-algorithms-0.8.0.4 Building vector-binary-instances-0.2.5.2 Building vector-th-unbox-0.2.1.9 Building math-functions-0.3.4.2 Completed vector-binary-instances-0.2.5.2 Starting aeson-1.5.6.0 Completed vector-th-unbox-0.2.1.9 Building aeson-1.5.6.0 Completed math-functions-0.3.4.2 Starting mwc-random-0.15.0.1 Building mwc-random-0.15.0.1 Completed vector-algorithms-0.8.0.4 Starting dense-linear-algebra-0.1.0.0 Building dense-linear-algebra-0.1.0.0 Completed dense-linear-algebra-0.1.0.0 Completed mwc-random-0.15.0.1 Starting monad-par-0.3.5 Building monad-par-0.3.5 Completed monad-par-0.3.5 Completed aeson-1.5.6.0 Starting statistics-0.15.2.0 Building statistics-0.15.2.0 Completed statistics-0.15.2.0 Starting multilinear-0.2.0 Building multilinear-0.2.0 Failed to install multilinear-0.2.0 Build log ( /home/builder/.cabal/logs/ghc-8.10.2/multilinear-0.2.0-JWu3Pu5HdUyDWWsjVFR5nB.log ): cabal: Entering directory '/tmp/cabal-tmp-30659/multilinear-0.2.0' Configuring multilinear-0.2.0... Preprocessing library for multilinear-0.2.0.. Building library for multilinear-0.2.0.. [ 1 of 13] Compiling Multilinear ( src/Multilinear.hs, dist/build/Multilinear.o, dist/build/Multilinear.dyn_o ) [ 2 of 13] Compiling Multilinear.Index ( src/Multilinear/Index.hs, dist/build/Multilinear/Index.o, dist/build/Multilinear/Index.dyn_o ) [ 3 of 13] Compiling Multilinear.Class ( src/Multilinear/Class.hs, dist/build/Multilinear/Class.o, dist/build/Multilinear/Class.dyn_o ) [ 4 of 13] Compiling Multilinear.Index.Finite ( src/Multilinear/Index/Finite.hs, dist/build/Multilinear/Index/Finite.o, dist/build/Multilinear/Index/Finite.dyn_o ) [ 5 of 13] Compiling Multilinear.Index.Infinite ( src/Multilinear/Index/Infinite.hs, dist/build/Multilinear/Index/Infinite.o, dist/build/Multilinear/Index/Infinite.dyn_o ) [ 6 of 13] Compiling Multilinear.Generic ( src/Multilinear/Generic.hs, dist/build/Multilinear/Generic.o, dist/build/Multilinear/Generic.dyn_o ) src/Multilinear/Generic.hs:274:10: error: " Could not deduce (Semigroup (Tensor a)) arising from the superclasses of an instance declaration from the context: Num a bound by the instance declaration at src/Multilinear/Generic.hs:(274,10)-(276,26) " In the instance declaration for Monoid (Tensor a) | 274 | instance ( | ^... src/Multilinear/Generic.hs:938:13: error: " Could not deduce (Semigroup (Tensor a)) arising from a use of <> from the context: Num a bound by the instance declaration at src/Multilinear/Generic.hs:778:10-38 " In the expression: t1' <> t2' In the expression: let t1' = t1 <<<| ind t2' = t2 <<<| ind in t1' <> t2' In an equation for augment: augment t1 t2 ind = let t1' = t1 <<<| ind t2' = t2 <<<| ind in t1' <> t2' | 938 | in t1' <> t2' | ^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-30659/multilinear-0.2.0' cabal: Error: some packages failed to install: multilinear-0.2.0-JWu3Pu5HdUyDWWsjVFR5nB failed during the building phase. The exception was: ExitFailure 1