ParallelListComp leads to syntactically invalid result
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StefanFehrenbach commented
This Haskell file compiles just fine with ghc 8.10.
{-# LANGUAGE ParallelListComp #-}
main = undefined
b = undefined
c = undefined
d = undefined
e = undefined
a = [ b
| c
| d <- e
]
But running brittany 0.13.1.1 on it causes it to print an error: ERROR: brittany pretty printer returned syntactically invalid result.
Running with --output-on-errors
produces this output
{-# LANGUAGE ParallelListComp #-}
main = undefined
b = undefined
c = undefined
d = undefined
e = undefined
a = [ b | c d <- e ]
brittany.yaml
conf_debug:
dconf_roundtrip_exactprint_only: false
dconf_dump_bridoc_simpl_par: false
dconf_dump_ast_unknown: false
dconf_dump_bridoc_simpl_floating: false
dconf_dump_config: false
dconf_dump_bridoc_raw: false
dconf_dump_bridoc_final: false
dconf_dump_bridoc_simpl_alt: false
dconf_dump_bridoc_simpl_indent: false
dconf_dump_annotations: false
dconf_dump_bridoc_simpl_columns: false
dconf_dump_ast_full: false
conf_forward:
options_ghc:
- -XBangPatterns
- -XBlockArguments
- -XExplicitForAll
- -XExplicitNamespaces
- -XGADTs
- -XImplicitParams
- -XLambdaCase
- -XMultiWayIf
- -XNumericUnderscores
- -XParallelListComp
- -XPatternGuards
- -XQuasiQuotes
- -XRecursiveDo
- -XTemplateHaskell
- -XTupleSections
- -XTypeApplications
- -XViewPatterns
conf_errorHandling:
econf_ExactPrintFallback: ExactPrintFallbackModeInline
econf_Werror: false
econf_omit_output_valid_check: false
econf_produceOutputOnErrors: false
conf_preprocessor:
ppconf_CPPMode: CPPModeAbort
ppconf_hackAroundIncludes: false
conf_version: 1
conf_layout:
lconfig_altChooser:
tag: AltChooserBoundedSearch
contents: 3
lconfig_importColumn: 50
lconfig_alignmentLimit: 30
lconfig_indentListSpecial: true
lconfig_indentAmount: 2
lconfig_alignmentBreakOnMultiline: true
lconfig_cols: 80
lconfig_indentPolicy: IndentPolicyFree
lconfig_indentWhereSpecial: true
lconfig_columnAlignMode:
tag: ColumnAlignModeMajority
contents: 0.7