D compiler is eating all the memory when compiling and then out of memory!

[dangbinghoo]

hi,

I have tried to build the hunt-sql package on Windows 7 
32bit(with 3GB RAM), dmd and ldc2 both failed with default option 
"out of memory".

And after trying with `dub build-mode=singleFile`, dmd compiles 
all the .d file, but "out of memory" when linking. and ldc2 says 
'single linking is not supported'.

we should at least compiles the program, we need to use memory 
the OS gived to US, not just "out of memory" and then quit.


and I tried to supply gc options to dmd and ldc2 it self, has no 
effects at all.

detailed err info:

----------------------------------------------------------------------------------------------------
dub build hunt-sql --build-mode=singleFile --compile=dmd


Compiling 
..\AppData\Local\dub\packages\hunt-sql-1.0.7\hunt-sql\source\hunt\sql\visitor\functions\Ucase.d...
Compiling 
..\AppData\Local\dub\packages\hunt-sql-1.0.7\hunt-sql\source\hunt\sql\visitor\functions\Unhex.d...
Compiling 
..\AppData\Local\dub\packages\hunt-sql-1.0.7\hunt-sql\source\hunt\sql\visitor\functions\package.d...
Compiling 
..\AppData\Local\dub\packages\hunt-sql-1.0.7\hunt-sql\source\hunt\sql\visitor\package.d...
Linking...
---
ERROR: This is a compiler bug.
Please report it via https://issues.dlang.org/enter_bug.cgi
with, preferably, a reduced, reproducible example and the 
information below.
DustMite (https://github.com/CyberShadow/DustMite/wiki) can help 
with the reduction.
---
DMD v2.087.1

predefs   DigitalMars Windows CRuntime_Microsoft 
CppRuntime_Microsoft LittleEndian D_Version2 all D_InlineAsm 
D_InlineAsm_X86 X86 Win32 assert D_ModuleInfo D_Exceptions 
D_TypeInfo D_HardFloat
binary    C:\D\dmd2\windows\bin\dmd.exe
version   v2.087.1

config    C:\D\dmd2\windows\bin\sc.ini
DFLAGS    -IC:\D\dmd2\windows\bin\..\..\src\phobos 
-IC:\D\dmd2\windows\bin\..\..\src\druntime\import -lowmem 
'--DRT-gcopt=profile:1 maxPoolSize:1024' -L/OPT:NOICF
---

core.exception.OutOfMemoryError at src\core\exception.d(702): Memory 
allocation failed
----------------
0x005F7DBC
0x005956FC
C:\D\dmd2\windows\bin\dmd.exe failed with exit code 1.

----------------------------------------------------------------------------------------------------
dub build hunt-sql --build-mode=singleFile --compiler=ldc2

Compiling 
..\AppData\Local\dub\packages\hunt-sql-1.0.7\hunt-sql\source\hunt\sql\visitor\package.d...
Linking...
Separate linking not implemented for LDC

# ldc2 --version
LDC - the LLVM D compiler (1.17.0):
   based on DMD v2.087.1 and LLVM 8.0.1
   built with LDC - the LLVM D compiler (1.17.0)


Thanks!

~~~~~
binghoo dang