--message-format=json doesn't emit every error message #5992
Description
Steps to reproduce:
$ cargo new foo
$ cd foo
$ echo 'yew = "= 0.4.0"' >> Cargo.toml
Replace src/main.rs with this:
#[macro_use]
extern crate yew;
fn main() {
html! {
<div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
</div>
}
}
Then if you build it:
$ cargo build --target=wasm32-unknown-unknown
you'll get the following error:
error: recursion limit reached while expanding the macro `stringify`
--> src/main.rs:5:5
|
5 | / html! {
6 | | <div>
7 | | <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
8 | | <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
... |
17 | | </div>
18 | | }
| |_____^
|
= help: consider adding a `#![recursion_limit="128"]` attribute to your crate
= note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
error: aborting due to previous error
error: Could not compile `foo`.
however if you build it with:
cargo build --target=wasm32-unknown-unknown --message-format=json
then the error message is missing from the output. I'd expect cargo to emit a line with {"reason": "compiler-message", ...} just as it usually does for errors; instead it emits no "compiler-message"s, e.g. the output of this (to match only "compiler-message"s):
$ cargo build --target=wasm32-unknown-unknown --message-format=json | ruby -ne 'require "json"; require "pp"; j = JSON.parse( $_ ); if j["reason"] == "compiler-message"; pp j; end'
is empty.