Commit 187f0c1e262cbeb37d72c571381b5b94c1eb3a63 | zig

Resolves: #19677

2 files changed, 21 insertions(+), 1 deletions(-)

src/Sema.zig+6-1

...	...	@@ -4279,7 +4279,7 @@ fn zirResolveInferredAlloc(sema: Sema, block: Block, inst: Zir.Inst.Index) Com
4279	4279	const const_ptr_ty = try sema.makePtrTyConst(final_ptr_ty);
4280	4280	const new_const_ptr = try mod.getCoerced(Value.fromInterned(ptr_val), const_ptr_ty);
4281	4281
4282		// Remap the ZIR oeprand to the resolved pointer value
	4282	// Remap the ZIR operand to the resolved pointer value
4283	4283	sema.inst_map.putAssumeCapacity(inst_data.operand.toIndex().?, Air.internedToRef(new_const_ptr.toIntern()));
4284	4284
4285	4285	// Unless the block is comptime, `alloc_inferred` always produces
...	...	@@ -4305,6 +4305,11 @@ fn zirResolveInferredAlloc(sema: Sema, block: Block, inst: Zir.Inst.Index) Com
4305	4305	.data = .{ .ty = final_ptr_ty },
4306	4306	});
4307	4307
	4308	if (ia1.is_const) {
	4309	// Remap the ZIR operand to the pointer const
	4310	sema.inst_map.putAssumeCapacity(inst_data.operand.toIndex().?, try sema.makePtrConst(block, ptr));
	4311	}
	4312
4308	4313	// Now we need to go back over all the store instructions, and do the logic as if
4309	4314	// the new result ptr type was available.
4310	4315

test/cases/compile_errors/assign_to_constant_destructure.zig created+15

...	...	@@ -0,0 +1,15 @@
	1	export fn a() void {
	2	const S = struct {
	3	fn b() struct { usize, usize } {
	4	return .{ 0, 0 };
	5	}
	6	};
	7	const c, _ = S.b();
	8	c += 10;
	9	}
	10
	11	// error
	12	// backend=stage2
	13	// target=native
	14	//
	15	// :8:7: error: cannot assign to constant