The C variadic spellings ("..." and the GNU "name..."), an empty or
trailing parameter, a missing comma, a stray token and an unterminated
list all parsed silently before: non-identifier tokens were skipped, so
"#define M(...)" defined a zero-parameter macro and invocations were
diagnosed only by argument count, if at all. The toolchain rejects the
definition itself ("bad definition for macro"), and so does the
preprocessor now: the parameter list must be identifiers separated by
single commas and closed by the parenthesis, and a rejected definition
leaves the name unbound. The spellings join the fuzz corpus.
Assisted-by: GLM 5.3
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 include guard's scope is now pinned from three sides: a file
including itself is a cycle diagnostic, a chain of two thousand distinct
headers completes with the deepest content spliced, and a header reached
again through a separate branch splices a second time and is refused as
a redefinition.
Assisted-by: GLM 5.3
The toolchain's disassembler prints the segment-prefixed disp32
absolute as FS:0, but the bare-name branch read the segment register
alone and dropped the offset, so MOVQ FS:0, DX silently encoded a
register move. The colon-offset form now lowers to the same
segment-absolute operand the 0(FS) spelling takes.
Assisted-by: GLM 5.3 Flash
petrbalvin