A bare GLOBL or DATA parsed without a single diagnostic while leaving a
nil Name in the tree, a pointer every downstream tool dereferences; TEXT
keeps a placeholder beside its error for exactly that reason, and GLOBL
and DATA now do the same. The crashing input enters the corpus.
Assisted-by: GLM 5.3
The two inputs the expansion round-trip target was built for, the object
macro with a parenthesised body and the continuation-only macro body,
enter the seed corpus so every plain go test run replays them.
Assisted-by: GLM 5.3
petrbalvin