[GHC] #13531: GHC fails with "Dynamic linker not initialised" when -j is on and trying to load nonexistent .so file
GHC
ghc-devs at haskell.org
Wed Apr 5 13:27:40 UTC 2017
#13531: GHC fails with "Dynamic linker not initialised" when -j is on and trying to
load nonexistent .so file
-------------------------------------+-------------------------------------
Reporter: nh2 | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 8.0.2
Keywords: | Operating System: Unknown/Multiple
Architecture: | Type of failure: Compile-time
Unknown/Multiple | crash or panic
Test Case: | Blocked By:
Blocking: | Related Tickets: #13137, #9868,
| #10355
Differential Rev(s): | Wiki Page:
-------------------------------------+-------------------------------------
For ghc 8.0.2 (on Linux, in nixpkgs `0c041520c3` for exact
reproducibility), when TH is used in a `ghc --make -j1` invocation, and
thus ghc does the whole
{{{
cc -fno-stack-protector -DTABLES_NEXT_TO_CODE '-std=c++14' -Wno-
deprecated-declarations --print-file-name liblibglog.so
Loading object (dynamic) glog ... done
}}}
business, and the `.so` file in question does not exist, then usually GHC
prints
{{{
<command line>: user specified .o/.so/.DLL could not be loaded
(libglog.so: cannot open shared object file: No such file or directory)
}}}
However, I found that when parallel compilation is enabled, (e.g. `ghc
-j4`), I can get this instead:
{{{
[ 23 of 130] Compiling Mymodule ( Mymodule.hs, dist/build/Mymodule.o )
<no location info>: error:
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.2 for x86_64-unknown-linux):
Dynamic linker not initialised
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13531>
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