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Xmobar crashes with segmentation fault

OS: Arch Kernel version: 4.16.13-2-ARCH Xmobar version: 0.26 ghc version: 8.4.3

Xmobar crashes after some time (1 sec or 1 day - very different each time). And, as I see, reasons are different to:

1:

voronwe@sul ~> xmobar 
Fields missing from config defaulted: additionalFonts,wmClass,wmName,border,borderColor,textOffset,iconOffset,iconRoot,alpha
xmobar: internal error: evacuate: strange closure type 4689
    (GHC version 8.4.3 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
fish: 'xmobar' terminated by signal SIGABRT (Abort)

2:

voronwe@sul ~> xmobar 
Fields missing from config defaulted: additionalFonts,wmClass,wmName,border,borderColor,textOffset,iconOffset,iconRoot,alpha
fish: 'xmobar' terminated by signal SIGSEGV (Address boundary error)

See my issue on xmobar github for details: https://github.com/jaor/xmobar/issues/354

Trac metadata
Trac field Value
Version 8.4.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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