Test/spv.pragma.stdgl.oob.vert

#version 450
// Regression test: #pragma STDGL with fewer than 4 tokens must not OOB-read
// tokens[1]/tokens[3] in handlePragma() — fixed by checking tokens.size() >= 4
// before accessing them (ParseHelper.cpp).
#pragma STDGL
#pragma STDGL invariant
#pragma STDGL invariant(
void main() {}