ghc's dwarf (-g) output does not like Unicode (Char.intToDigit: not a digit 136)

Easy to reproduce as:

inplace/bin/ghc-stage2 -w -g -c testsuite/tests/parser/unicode/utf8_024.hs
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 7.9.20141219 for x86_64-unknown-linux):
        Char.intToDigit: not a digit 136

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

petermw> Yes, Unicode doesn't work with DWARF yet

Trac metadata

Trac field	Value
Version	7.9
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 5

added Tbug Trac import labels

closed

changed milestone to %8.0.1

I believe this is fixed in master,

$ inplace/bin/ghc-stage2  -fforce-recomp -g2 testsuite/tests/parser/unicode/utf8_024.hs
[1 of 1] Compiling Main             ( testsuite/tests/parser/unicode/utf8_024.hs, testsuite/tests/parser/unicode/utf8_024.o )

testsuite/tests/parser/unicode/utf8_024.hs:174:6: warning:
    Tab character found here, and in 15 further locations.
    Please use spaces instead.
Linking testsuite/tests/parser/unicode/utf8_024 ...
$ testsuite/tests/parser/unicode/utf8_024
29

Trac metadata

Trac field	Value
TypeOfFailure	OtherFailure → CompileTimeCrash
Resolution	Unresolved → ResolvedFixed

added compiler crash label

added debug information label

added Pnormal label