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| author | Aaron Hill <aa1ronham@gmail.com> | 2019-09-26 16:55:07 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-09-26 16:55:07 -0400 |
| commit | 97906bcd5c9c5ba5d165c7330b2ee062a97f11cf (patch) | |
| tree | ee1cbed4345856fe445218a8cd7455a77445bee9 | |
| parent | e9aa0e7540b2bc0e644dde84aeca41d055e7511f (diff) | |
| download | rust-97906bcd5c9c5ba5d165c7330b2ee062a97f11cf.tar.gz rust-97906bcd5c9c5ba5d165c7330b2ee062a97f11cf.zip | |
Add note about global state in try_print_query_stack
| -rw-r--r-- | src/librustc/ty/query/plumbing.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/librustc/ty/query/plumbing.rs b/src/librustc/ty/query/plumbing.rs index e2dff46d18b..d3e6789b826 100644 --- a/src/librustc/ty/query/plumbing.rs +++ b/src/librustc/ty/query/plumbing.rs @@ -325,6 +325,9 @@ impl<'tcx> TyCtxt<'tcx> { pub fn try_print_query_stack(handler: &Handler) { eprintln!("query stack during panic:"); + // Be careful reyling on global state here: this code is called from + // a panic hook, which means that the global `Handler` may be in a weird + // state if it was responsible for triggering the panic. tls::with_context_opt(|icx| { if let Some(icx) = icx { let mut current_query = icx.query.clone(); |