Comment #0 by snarwin+bugzilla — 2021-10-10T03:21:03Z
As of DMD 2.097.2, compiling the following program with the flag `-checkaction=context` results in a linker error.
---
import std;
void main()
{
assert(0);
}
---
The error is:
---
/usr/bin/ld: bug.o: in function `_Dmain':
bug.d:(.text._Dmain[_Dmain]+0x33): undefined reference to `_D4core8internal7dassert__T14_d_assert_failTiZQtFNaNbNiNfMxAyaxiZAya'
collect2: error: ld returned 1 exit status
Error: linker exited with status 1
---
Demangled:
---
/usr/bin/ld: bug.o: in function `_Dmain':
bug.d:(.text._Dmain[_Dmain]+0x33): undefined reference to `pure nothrow @nogc @safe immutable(char)[] core.internal.dassert._d_assert_fail!(int)._d_assert_fail(scope const(immutable(char)[]), const(int))'
collect2: error: ld returned 1 exit status
Error: linker exited with status 1
---
Removing the line `import std;`, or changing it to import a different module such as `std.range`, causes the program to compile and link successfully.
According to run.dlang.io, this is a regression introduced in DMD 2.093.
Comment #1 by andrej.mitrovich — 2022-09-08T15:18:48Z
Just ran into this one. So sad it's been broken for a year.
I don't recall what was the reason this option is enabled via the -checkaction=context switch? Is it to avoid additional memory allocations?
Comment #2 by elpenguino+D — 2022-12-19T23:03:13Z
I've just encountered this as well. Still fails on DMD 2.101.1 with the same missing symbol, but when combined with -allinst, it fails in a subtly different way:
```
/dlang/dmd/linux/bin64/../../src/phobos/std/variant.d:941: error: undefined reference to '_D4core8internal7dassert__T14_d_assert_failTbZQtFNaNbNiNfMxAyaxbZAya'
```
This one is a `pure nothrow @nogc @safe immutable(char)[] core.internal.dassert._d_assert_fail!(bool)._d_assert_fail(scope const(immutable(char)[]), const(bool))`
Comment #3 by kdevel — 2024-09-30T10:41:44Z
(In reply to Paul Backus from comment #0)
> As of DMD 2.097.2, compiling the following program with the flag
> `-checkaction=context` results in a linker error.
>
> ---
> import std;
>
> void main()
> {
> assert(0);
> }
> ---
>
WORKSFORME
$ dmd --version
DMD64 D Compiler v2.109.1
Copyright (C) 1999-2024 by The D Language Foundation, All Rights Reserved written by Walter Bright
$ cat asszer.d
import std;
void main()
{
assert(0);
}
$ dmd asszer.d
$ ./asszer
[email protected](5): Assertion failure
----------------
??:? _d_assertp [0x4bbf14]
??:? _Dmain [0x4b30e0]