Bug 17588 – SIGSEGV in pthread_mutex_destroy on a shared library executable (with -pie)

a main program running dlopen/dlclose on a shared library executable (with -pie) generates a SEGFAULT on program termination: ``` dmd --version DMD64 D Compiler v2.074.1 FLAGS_link=-L~/dmd2_074_1/linux/lib64/,-rpath=~/dmd2_074_1/linux/lib64/,-lphobos2 dmd -offoo.o -c -fPIC foo.d /usr/bin/g++ -o libfoo foo.o -pie -Wl,$FLAGS_link,--export-dynamic foo.d: void main(){} main.d: void main(){ string file=`libfoo`; import core.sys.posix.dlfcn; import std.string:toStringz; auto flag=RTLD_LAZY | RTLD_LOCAL; auto handle=dlopen(file.toStringz, flag); assert(handle); int ret=dlclose(handle); assert(!ret); import std.stdio; writeln("ok"); // segfaults before process executes } dmd -run main.d #SEGFAULT ``` Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7bc36b1 in pthread_mutex_destroy () from /lib/x86_64-linux-gnu/libpthread.so.0 (gdb) bt #0 0x00007ffff7bc36b1 in pthread_mutex_destroy () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x0000000000619836 in _d_critical_term () #2 0x0000000000605db8 in rt_term () #3 0x00000000005c6d46 in _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFNlZv () #4 0x00000000005c6cbc in _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFNlMDFZvZv () #5 0x00000000005c6c2c in _d_run_main () #6 0x00000000005555ae in main () #7 0x00007ffff6ee8830 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6 #8 0x0000000000554019 in _start () ```

it works with: -Bstatic,-lphobos2,-Bdynamic instead of: -lphobos2

D20170703T114214