This code causes a link error(LNK1179):
foo/bar.d
-------------
import std.algorithm;
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foo/main.d
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module foo.main;
import std.path;
void foo(string file) { file.relativePath; }
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hoge.d
-------------
import foo.main;
void main() { }
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Compile with follows:
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dmd -m64 -lib -offoo.lib -cov foo\bar.d foo\main.d
dmd -m64 -cov hoge.d foo.lib
foo.lib(main.obj) : fatal error LNK1179: ファイルが無効か、または壊れています: COMDAT '__bzeroBytes' を複製します。(Maybe, in English: invalid or corrupt file: duplicate COMDAT '__bzeroBytes')
Error: linker exited with status 1179
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Conditions: On Windows, x86_64(-m64), coverage(-cov) is enabled, and the installed MSVC(vs_buildtools 2019) environment.
It does not reproduce on other OS, MinGW(MSVC is not installed), x86, or without -cov.
And if removing unnecessary import statements or unnecessary files, the situation will not be reproduced.
Below is a similar link error but the situation seemed different.
https://issues.dlang.org/show_bug.cgi?id=20565
Comment #1 by kntroh — 2021-04-29T06:38:04Z
I got a similar error. However, the error code was LNK2005:
source/test.d:
---
import b;
void main() { }
---
sub/a.d:
---
import std.algorithm;
---
sub/b.d:
---
module b;
import std;
class C { void c() { f(); } }
struct S {
double a = 0;
string b;
S[] c;
@disable
this ();
}
S f() {
int[] arr;
array(map!(a => f())(arr));
assert (0);
}
---
dub.json:
---
{
"name": "test",
"targetType": "executable",
"application": "test.d",
"dependencies": { ":sub": "*" },
"subPackages": [{
"name": "sub",
"targetType": "library",
"sourcePaths": [ "sub" ],
"importPaths": [ "sub" ]
}]
}
---
When I prepare these files and build it by dub on Windows, I got an error that "__bzeroBytes already defined".
I have confirmed the reproduction with dmd 2.096.1 on Windows 8.1 and Windows 10 (20H2).
$ dub
Performing "debug" build using ***\dmd2\windows\bin\dmd.exe for x86_64.
test:sub ~master: target for configuration "library" is up to date.
test ~master: building configuration "application"...
Linking...
test_sub.lib(b_33_53.obj) : error LNK2005: __bzeroBytes は既に test_sub.lib(b_40_9af.obj) で定義されています。(__bzeroBytes already defined in test_sub.lib(h_48_8a7.obj))
.dub\build\application-debug-windows-x86_64-dmd_v2.096.1-dirty-4872E8CFA9A99F10C9963544DB0FC94E\test.exe : fatal error LNK1169: 1 つ以上の複数回定義されているシンボルが見つかりました。(found one or more symbols with multiple definitions)
Error: linker exited with status 1169
***\dmd2\windows\bin\dmd.exe failed with exit code 1.
$
I tried to see if I could make the reproduction code smaller, but it was impossible. For example, just replace `double a = 0;` with `double a = 1;` and it will not reproduce.
Comment #2 by robert.schadek — 2024-12-13T19:07:32Z