The condition_variables is a feature on the standard library of c++ (libstdc++), when its compiled statically a weird asm code is generated.
Any example on the link below will crash if its compiled statically:
In this case the condition_variable.wait() crashed, but this happens with other methods, a simple way to trigger it:
If this program is compiled dynamically the crash doesn’t occur:
Looking the dissasembly there is a surprise created by the compiler:
Both compilers are generating the “call 0x00”
If we check this call in a dynamic compiled:
The implementation of condition_variable in github:
The compilers can’t copile well this code in static, and same happens on other condition_variable methods.
I would say the _lock is being assembled improperly in static, is not exacly a null pointer derreference but the effects are the same, executing code at address 0x00 which on linux is a crash on most of cases.