[Bug middle-end/78548] [7 Regression ]ICE on valid C code on x86_64-linux-gnu at -O2 and -O3 in 64-bit mode with -Wall (*** Error in `/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/cc1': double free or corruption (fasttop): 0x0000000003c15810 ***)

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78548

--- Comment #7 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
The following patch has been approved to fix this:

https://gcc.gnu.org/ml/gcc-patches/2016-12/msg00039.html

But it depends on the approval pending patch for pr78566.