[Issue 7919] New: Sample code works on GDC but fails with DMD

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7919

           Summary: Sample code works on GDC but fails with DMD
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: russel at winder.org.uk


--- Comment #0 from Russel Winder <russel at winder.org.uk> 2012-04-15 11:45:57 PDT ---
The code:

import std.algorithm ;
import std.range ;
import std.stdio ;
import core.thread ;

int main ( immutable string[] args ) {
  auto threads = array ( map ! ( ( int a ) {
      void delegate ( ) f ( ) {
        return delegate ( ) { writeln ( a ) ; } ; 
      }
      return new Thread ( f )  ;
      } ) ( iota ( 10 ) ) ) ;
  foreach ( t ; threads ) { t.start ( ) ; }
  foreach ( t ; threads ) { t.join ( ) ; }
  return 0 ;
}

compiles and runs as expected when using GDC on Linux:


Using built-in specs.
COLLECT_GCC=gdc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.3-1'
--with-bugurl=file:///usr/share/doc/gdc-4.6/README.Bugs
--enable-languages=c,c++,d --prefix=/usr --program-suffix=-4.6 --enable-shared
--enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-time=yes
--enable-gnu-unique-object --disable-libmudflap --enable-plugin
--disable-multilib --with-arch-32=i586 --with-tune=generic
--disable-libquadmath --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Debian 4.6.3-1) 


However when using DMD 2.059, the compilation fails with the error:



/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/traits.d(1482):
Error: void does not have a default initializer
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/traits.d(1493):
Error: template instance std.traits.hasIndirections!(Thread).Impl!(void[168LU])
error instantiating
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(143):
       instantiated from here: hasIndirections!(Thread)
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(143):
Error: template instance std.traits.hasIndirections!(Thread) error
instantiating
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(243):
Error: template instance std.array.blockAttribute!(Thread) error instantiating
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(194):
       instantiated from here: arrayAllocImpl!(false,Thread[],uint)
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(42):
       instantiated from here: uninitializedArray!(Thread[],uint)
initializingWithAMap.d(9):        instantiated from here: array!(Result)
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(194):
Error: template instance std.array.arrayAllocImpl!(false,Thread[],uint) error
instantiating
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(42):
       instantiated from here: uninitializedArray!(Thread[],uint)
initializingWithAMap.d(9):        instantiated from here: array!(Result)
/home/users/russel/lib.Linux.x86_64/DMD2/bin64/../../src/phobos/std/array.d(42):
Error: template instance std.array.uninitializedArray!(Thread[],uint) error
instantiating
initializingWithAMap.d(9):        instantiated from here: array!(Result)
initializingWithAMap.d(9): Error: template instance std.array.array!(Result)
error instantiating

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