pub static INCOMPFUNC: AtomicI32Expand description
Port of mod_export int incompfunc from Src/utils.c:46.
Set non-zero while a comp* builtin is dispatching from inside
a user-defined completion function — guards comparguments /
compset / compadd / compdescribe / comptags / compvalues
/ compfiles / compgroups / compquote against being called
outside the compfunc shfunc context (each builtin checks
INCOMPFUNC early and emits “can only be called from completion
function” when zero).