This commit starts by making Zir.Inst.Index a nonexhaustive enum rather
than a u32 alias for type safety purposes, and the rest of the changes
are needed to get everything compiling again.
This field had the wrong type. It's not a `Zir.Inst.Index`, it's
actually a `Zir.OptionalExtraIndex`. Also, the former is currently
aliased to `u32` while the latter is a nonexhaustive enum that gives us
more type checking.
This commit is preparation for making this field non-optional. Now it
can be changed to `Zir.ExtraIndex` and then the compiler will point out
all the places that the non-optional assumption is being violated.
This is consistent with `JSON.parse("-0")` in JavaScript, RFC 8259
doesn't specifically mention what to do in this case.
If a negative zero is encoded the intention is likely to preserve the
sign.
add error.EndOfStream to readEnum() and isBytes() so that users can
catch these errors. this also prevents them from panicing with
'invalid error value' on EndOfStream.
test both methods.
This adds scheme guessing when loading proxies, such that
`HTTP_PROXY=127.0.0.1` and such are valid now and it behaves identically
to `HTTP_PROXY=http://127.0.0.1`. Additionally fixed a typo that was
causing loadDefaultProxies to never populate the https_proxy.
The main motivating change here is to prevent the creation of a fake
Decl object by the frontend in order to `@export()` a value.
Instead, `link.updateDeclExports` is renamed to `link.updateExports` and
accepts a tagged union which can be either a Decl.Index or a
InternPool.Index.
The main problem being fixed here is there was a getOrPut() that held on
to a reference to the value pointer too long, and meanwhile the call to
`lowerConst` ended up being recursive and mutating the hash map,
invoking undefined behavior.
caught via #17719
* 128-bit integer multiplication with overflow
* more instruction encodings used by std inline asm
* implement the `try_ptr` air instruction
* follow correct stack frame abi
* enable full panic handler
* enable stack traces
