Is DMD breaking BigInt?

[Russel Winder via Digitalmars-d-learn]

Simple Dub build of a Factorial example using Unit-Threaded for
testing. Works fine with ldc2 breaks with dmd. This is on Debian Sid
fully up to date. 

|> ldc2 --version
LDC - the LLVM D compiler (1.1.1):
  based on DMD v2.071.2 and LLVM 3.9.1
  built with LDC - the LLVM D compiler (1.1.0)
  Default target: x86_64-pc-linux-gnu
  Host CPU: broadwell
  http://dlang.org - http://wiki.dlang.org/LDC

|> dmd --version
DMD64 D Compiler v2.073.2

|> dub test --compiler=ldc2
Package factorial (configuration "unittest") defines no import paths, use {"importPaths": [...]} or the default package directory structure to fix this.
Running custom 'unittest' configuration.
Performing "unittest" build using ldc2 for x86_64.
unit-threaded 0.7.11: target for configuration "library" is up to date.
factorial ~master: building configuration "unittest"...
Running pre-build commands...
Building package unit-threaded in /home/users/russel/.dub/packages/unit-threaded-0.7.11/unit-threaded/
Performing "$DFLAGS" build using dmd for x86_64.
unit-threaded 0.7.11: building configuration "gen_ut_main"...
Linking...
Running ../../../../.dub/packages/unit-threaded-0.7.11/unit-threaded/gen_ut_main -f ut_main.d
To force a rebuild of up-to-date targets, run again with --force.
Running ./factorial-test 

Automatically generated file ut_main.d
Running unit tests from dirs ["."]
factorial.Check the base case for all algorithms.:
factorial.Check the property for all algorithms.:
factorial.Traditional example-based testing.:

Time taken: 34 ms, 363 μs, and 2 hnsecs
3 test(s) run, 0 failed.

OK!

|> dub test
Package factorial (configuration "unittest") defines no import paths, use {"importPaths": [...]} or the default package directory structure to fix this.
Running custom 'unittest' configuration.
Performing "unittest" build using dmd for x86_64.
unit-threaded 0.7.11: target for configuration "library" is up to date.
factorial ~master: building configuration "unittest"...
Running pre-build commands...
Building package unit-threaded in /home/users/russel/.dub/packages/unit-threaded-0.7.11/unit-threaded/
Performing "$DFLAGS" build using dmd for x86_64.
unit-threaded 0.7.11: building configuration "gen_ut_main"...
Linking...
Running ../../../../.dub/packages/unit-threaded-0.7.11/unit-threaded/gen_ut_main -f ut_main.d
factorial.d(71,15): Error: template std.bigint.BigInt.__ctor cannot deduce function from argument types !()(string) immutable, candidates are:
/usr/include/dmd/phobos/std/bigint.d(64,5):        std.bigint.BigInt.__ctor(Range)(Range s) if (isBidirectionalRange!Range && isSomeChar!(ElementType!Range) && !isInfinite!Range)
/usr/include/dmd/phobos/std/bigint.d(146,5):        std.bigint.BigInt.__ctor(T)(T x) if (isIntegral!T)
/usr/include/dmd/phobos/std/bigint.d(162,5):        std.bigint.BigInt.__ctor(T)(T x) if (is(Unqual!T == BigInt))
dmd failed with exit code 1.


If anyone has any useful intelligence as to what happening and how I
can workaround it, I'd be a grateful bunny.
 
-- 
Russel.
=============================================================================
Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder at ekiga.net
41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at winder.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
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