Weird Regex crash

Forgot to mention how I build tango. I use build-dmd.bat, build-tango.bat, and build-win32.bat. In that order. I built Tango with 1.026 first, and the rebuilt it with 1.027, and got the same results.

I'm using DMD 1.028, NT5.1 and I've same problem with this : import tango.io.Stdout; import tango.text.RegEx?;

int main(char[][] args) {

Stdout.formatln ("Hello world!");

return 0;

}

It's work perfectly if I comment the second line

Replying to xxltux: Please create a new ticket if this is a different problem. And please put code in triple braces like {{{ code goes here }}}.

Please describe exactly what happens when you try. And Regex is not being used in your testcase.

Please don't reply here if this is really a different issue.

I think it's the same problem, if I just import the module RegEx?, the exe crash with the same message(object.Exception: Access Violation). If I use really RegEx?, it's same but if the RegEx? module is not imported, it's work.

import tango.io.Stdout; import tango.text.RegEx??;

int main(char[][] args) {

Stdout.formatln ("Hello world!");

return 0;

} }}}

This code with an stdout at the start of main doesn't print "start" but print object.Exception: Access Violation :

import tango.io.Stdout;
import tango.text.Regex;

void main()
{
	Regex re = new Regex(r"(\d{1,3}\.){3}\d{1,3}(:\d{1,5})?");

	bool result = re.test("123.123.123.123");
	
	Stdout(result).newline;
}

You're right, I get an AV when I just import Regex without using it. Now I'm using 0.99.5, dmd 1.027 on winxp. Tango is built with the backtrace hack.

import tango.io.Stdout;
import tango.text.Regex;

int main(char[][] args) {

    Stdout.formatln ("Hello world!");

    return 0;

}

It's a linker problems, if I link manually the exe with tango-base, there isn't problems. Your code work perfectly. But I don't know why the linker don't make an error.

Replying to xxltux: tango-base? Don't you mean tango-user-dmd.lib?

No, but it's very strange!

D:\>dmd main.d

D:\>main.exe
object.Exception: Access Violation

D:\>dmd main.d tango-base-dmd.lib

D:\>main.exe
Hello world!

D:\>

This is my sc.ini :

[Version]
version=7.51 Build 020

[Environment]
; Switch the commenting on LIB and DFLAGS to toggle back to Phobos!
; LIB="%@P%\..\lib";\dm\lib
LIB="%@P%\..\import\lib;%@P%\..\lib;%@P%\..\..\dm\lib"
; DFLAGS="-I%@P%\..\src\phobos"
DFLAGS="-I%@P%\..\import" -version=Tango -defaultlib=tango-base-dmd -debuglib=tango-base-dmd -L+tango-user-dmd.lib
LINKCMD=%@P%\..\..\dm\bin\link.exe

I get this with DDBG :

No symbols available from ntdll.dll
ntdll.dll loaded at 0x7c910000
No symbols available from KERNEL32.dll
KERNEL32.dll loaded at 0x7c800000
No symbols available from SHELL32.dll
SHELL32.dll loaded at 0x7c9d0000
No symbols available from ADVAPI32.dll
ADVAPI32.dll loaded at 0x77da0000
No symbols available from RPCRT4.dll
RPCRT4.dll loaded at 0x77e50000
No symbols available from Secur32.dll
Secur32.dll loaded at 0x77fc0000
No symbols available from GDI32.dll
GDI32.dll loaded at 0x77ef0000
No symbols available from USER32.dll
USER32.dll loaded at 0x7e390000
No symbols available from msvcrt.dll
msvcrt.dll loaded at 0x77be0000
No symbols available from SHLWAPI.dll
SHLWAPI.dll loaded at 0x77f40000
Unknown breakpoint hit at ntdll.dll (0x7c911230) thread(2500)
No symbols available from IMM32.dll
IMM32.dll loaded at 0x76320000
No symbols available
unknown DLL loaded
No symbols available from ole32.dll
ole32.dll loaded at 0x774a0000
No symbols available from FLTLIB.DLL
FLTLIB.DLL loaded at 0x5e100000
No symbols available from WINSTA.dll
WINSTA.dll loaded at 0x762f0000
No symbols available from NETAPI32.dll
NETAPI32.dll loaded at 0x6fee0000
No symbols available from COMCTL32.dll
COMCTL32.dll loaded at 0x77390000
No symbols available from COMCTL32.dll
COMCTL32.dll loaded at 0x58b50000
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at tango.text.Regex.
__T4TDFATwZ.TDFA.epsilonClosure.tango.text.Regex.__T4TDFATwZ.TDFA.SubsetState.ta
ngo.text.Regex.__T4TDFATwZ.TDFA.SubsetState.tango.text.Regex.__T4TDFATwZ.TDFA.Su
bsetState (0x0040a1be) thread(2500)
->us
#0 class tango.text.Regex.TDFA!(dchar).TDFA.SubsetState tango.text.Regex.TDFA!(d
char).TDFA.epsilonClosure(class tango.text.Regex.TDFA!(dchar).TDFA.SubsetState,
class tango.text.Regex.TDFA!(dchar).TDFA.SubsetState, void*) () from Regex

I think this is the same problem. One friend just tried this example from the manual using the last version of Tango:

import tango.io.Stdout;
import tango.text.Regex;
 
void main()
{
    foreach(m; Regex("ab").search("qwerabcabcababqwer"))
            Stdout.formatln("{}[{}]{}", m.pre, m.match(0), m.post);
}

And it caused "object.Exception: Access Violation". Adding the lib to the build command fixed it (dmd main.d tango-base-dmd.lib).

I think so

There is a known Access Violation in the released version of Tango regex (995), which is fixed in SVN trunk. We'll get a new release out soon

make sure you follow miasma's suggestion to explicitly recompile the user-libs, or don't use libs at all (use rebuild instead). there have been several reports of this problem disappearing after this was changed. if the problem persists, use the latest trunk or wait for 0.99.6.

I've the same problem with trunk 3418

i cannot reproduce the crash using 3418 or 3426. could you paste your exact library- and compiler versions as well as your build command and source code? if you use a build tool like rebuild, please make sure to paste the verbose output (option -v for rebuild).

I'm using DMD 1.028 and the latest trunk(3428). I don't use rebuild but build-dmd.bat...

Tango compilation outpu

With "-g" option on windows, the program doesn't crash ( DMD 1.029 and svn 3468 ).

I think I saw the same thing, so I wasn't able to debug the crash.

Could people test this with the latest Tango revision? I got some reports that it seems to not manifest there.

Reported as fixed here.

Yup, unable to reproduce this with 0.99.9. Of course, that only means I bump into another regex bug...