Linker failure: multiple definition of
Linker fails on a normal project built with cabal (-O1), both on my home machine (GNU gold (GNU Binutils for Ubuntu 2.22) 1.11) and on travis with GHC 8.0.1:
https://travis-ci.org/LambdaHack/LambdaHack/jobs/159457149\#L589
and with head:
https://travis-ci.org/LambdaHack/LambdaHack/jobs/159457156\#L602
It compiles fine with -O0 (but if fails with -O2):
https://travis-ci.org/LambdaHack/LambdaHack/jobs/159457144
with older GHCs:
https://travis-ci.org/LambdaHack/LambdaHack/jobs/159457155
and after the symbol the linker complains about is removed:
https://travis-ci.org/LambdaHack/LambdaHack/jobs/159506870
As seen on travis, the way to reproduce it is just cabal install of
https://github.com/LambdaHack/LambdaHack/commit/0d2bbd6eadca7a10292ab67ab1fa708b4c20aaf6
which also shows the offending line.
I took the liberty of adding it to 8.0.2 milestone, because if it affects all x86_64 machines, it's pretty serious. Please feel free to downgrade.
If the bug is confirmed, I can attempt creating a small reproducing case, but it would require gtk, so it would compile forever anyway.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |