3 people 4172f4d3f2 Report an uniterable for range once (#7661) ...

Building a `for` loop looks `Core.Iterate` up twice: once for
`NewCursor` to make the cursor, and again for `Next` to advance it. A
range that implements neither failed both lookups and reported both, so
a loop over something that isn't iterable produced two errors saying the
same thing about the same expression.

The second lookup is skipped when the first already failed, which is
what `BuildBinaryOperator`'s `diagnose` parameter is for. The
`ErrorInst` it returns instead does not reach the produced SemIR: the
loop is abandoned on the error either way.

Assisted-by: Claude Code

---------

Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>

2026-08-21 04:09:16 +00:00

..

basics

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

class

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

const

Fix accessing members of const/partial types (#7406)

2026-06-25 00:07:39 +00:00

enum

Fix the textual IR name of WrapperBindingPattern (#7650)

2026-08-18 22:31:27 +00:00

function

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

impls

Fix the textual IR name of WrapperBindingPattern (#7650)

2026-08-18 22:31:27 +00:00

macros

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

modules

Fix contention between Clang and Carbon over external name lookup. (#7411)

2026-06-24 18:36:59 +00:00

namespace

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

operators

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

primitive_types

Fix the textual IR name of WrapperBindingPattern (#7650)

2026-08-18 22:31:27 +00:00

stdlib

Fix the textual IR name of WrapperBindingPattern (#7650)

2026-08-18 22:31:27 +00:00

template

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

type_alias

Skip ImplWitnessTable::elements_id when generating fingerprints (#7629)

2026-08-11 22:39:30 +00:00

var

Rename and rearrange entities in tests to avoid name reuse (#7656)

2026-08-21 01:36:40 +00:00

range_for.carbon

Report an uniterable for range once (#7661)

2026-08-21 04:09:16 +00:00