Commit 6e5bdb5397b5ec5ff3dd6e3ca6f7f93a9b6bfde9 | zig

2 files changed, 22 insertions(+), 3 deletions(-)

src/Sema.zig+11-3

...	...	@@ -11255,10 +11255,18 @@ fn zirSwitchBlockErrUnion(sema: Sema, block: Block, inst: Zir.Inst.Index) Comp
11255	11255	defer seen_errors.deinit();
11256	11256
11257	11257	const operand_ty = sema.typeOf(raw_operand_val);
11258		const operand_err_set_ty = if (extra.data.bits.payload_is_ref)
11259		operand_ty.childType(mod).errorUnionSet(mod)
	11258	const operand_err_set = if (extra.data.bits.payload_is_ref)
	11259	operand_ty.childType(mod)
11260	11260	else
11261		operand_ty.errorUnionSet(mod);
	11261	operand_ty;
	11262
	11263	if (operand_err_set.zigTypeTag(mod) != .ErrorUnion) {
	11264	return sema.fail(block, switch_src, "expected error union type, found '{}'", .{
	11265	operand_ty.fmt(mod),
	11266	});
	11267	}
	11268
	11269	const operand_err_set_ty = operand_err_set.errorUnionSet(mod);
11262	11270
11263	11271	const block_inst: Air.Inst.Index = @enumFromInt(sema.air_instructions.len);
11264	11272	try sema.air_instructions.append(gpa, .{

test/cases/compile_errors/switch_on_non_err_union.zig created+11

...	...	@@ -0,0 +1,11 @@
	1	pub fn main() void {
	2	false catch \|err\| switch (err) {
	3	else => {},
	4	};
	5	}
	6
	7	// error
	8	// backend=stage2
	9	// target=native
	10	//
	11	// :2:23: error: expected error union type, found 'bool'