Bug 6196 – with statement with single statement breaks linking

module test; static import std.stdio; void main() { with (std.stdio) writeln(); } OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html C:\DOCUME~1\Andrej\LOCALS~1\Temp\.rdmd\rdmd-test.d-A365FA805A6F8950E12081529066367B\test-d-A365FA805A6F8950E12081529066367B.obj(test-d-A365FA805A6F8950E12081529066367B) Error 42: Symbol Undefined _D3std5stdio12__T7writelnZ7writelnFZv This will work: module test; static import std.stdio; void main() { with (std.stdio) { writeln(); } } Note how in the next example the first `with` statement has curly braces and references writeln(), it gets linked in, and the linker errors are gone for the second `with` statement: static import std.stdio; void main() { with (std.stdio) { writeln(); } with (std.stdio) writeln(); }

(In reply to comment #0) > module test; > static import std.stdio; > > void main() > { > with (std.stdio) writeln(); My guess is that with() was designed mostly for struct instances, class instances, and enum instances. I didn't even know you are allowed to use it with modules.

Compiles and runs fine with 2.059 Win32.

(In reply to comment #2) > Compiles and runs fine with 2.059 Win32. That's not true. module test; static import std.stdio; void main() { with (std.stdio) writeln(); } $ dmd test.d > OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html test.obj(test) Error 42: Symbol Undefined _D3std5stdio12__T7writelnZ7writelnFZv --- errorlevel 1 Maybe it works on Posix, but it's not working on my win32 system.

It doesn't work on Linux 64-bit, git HEAD: $ dmd test test.o: In function `_Dmain': test.d:(.text._Dmain+0x4): undefined reference to `_D3std5stdio12__T7writelnZ7writelnFZv' collect2: error: ld returned 1 exit status --- errorlevel 1

Interestingly enough, if I replace the with() clause with std.stdio.writeln() (which links without errors) and look at the resulting executable, it does define _D3std5stdio12__T7writelnZ7writelnFZv. Which means that the template isn't getting instantiated when used with a 'with' clause, perhaps?

The symbol is probably not referenced properly or something. module test; static import std.stdio; void main() { std.stdio.writeln("test"); // reference symbol with (std.stdio) writeln("test"); } If you remove the commented line you'll get a linker error.

*** Issue 8414 has been marked as a duplicate of this issue. ***

Seems to have been fixed in git HEAD; could you re-test?

(In reply to hsteoh from comment #8) > Seems to have been fixed in git HEAD; could you re-test? Yeah I can confirm it works now.. although I'm worried it's just a side-effect of any import changes we might have made within std.stdio, and the actual problem not being properly fixed. We'll see if it resurfaces.