mirror
/
rustc-dev-guide
mirror of https://github.com/rust-lang/rustc-dev-guide.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

treat-err-as-bug=n means panic on nth error

This commit is contained in:
Santiago Pastorino 2020-04-24 01:08:58 -03:00 committed by Who? Me?!
parent 07c46e7dcf
commit 1b0f87c8dc
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/compiler-debugging.md
View File

@ -69,11 +69,11 @@ stack backtrace:
## Getting a backtrace for errors ## Getting a backtrace for errors
[getting-a-backtrace-for-errors]: #getting-a-backtrace-for-errors [getting-a-backtrace-for-errors]: #getting-a-backtrace-for-errors
If you want to get a backtrace to the point where the compiler emits If you want to get a backtrace to the point where the compiler emits an
an error message, you can pass the `-Z treat-err-as-bug=n`, which error message, you can pass the `-Z treat-err-as-bug=n`, which will make
will make the compiler skip `n` errors or `delay_span_bug` calls and then the compiler panic on the `nth` error on `delay_span_bug.` If you leave
panic on the next one. If you leave off `=n`, the compiler will assume `0` for off `=n`, the compiler will assume `1` for `n` and thus panic on the
`n` and thus panic on the first error it encounters. first error it encounters.
This can also help when debugging `delay_span_bug` calls - it will make This can also help when debugging `delay_span_bug` calls - it will make
the first `delay_span_bug` call panic, which will give you a useful backtrace. the first `delay_span_bug` call panic, which will give you a useful backtrace.