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With dlopen() and libclang/libgccjit, you could argue C (on an OS that supports dynamic loading) has eval too ;)

You have system("gcc uploaded.c && ./a.out") too!

But that code doesn’t run in the memory space of the process.

Then compile it as a library, and dlopen() it after all. (I'm just guessing the gp's point was that JIT isn't really an essential modality.)

Only in programs that invoke it on hacker controlled data.

But if you only evoke eval() on non-hacker controlled data in a scripting language, it's probably fine too.