diff options
Diffstat (limited to 'compiler/rustc_query_system/src')
| -rw-r--r-- | compiler/rustc_query_system/src/dep_graph/graph.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_query_system/src/dep_graph/graph.rs b/compiler/rustc_query_system/src/dep_graph/graph.rs index af70e2a4264..2b3fa7f6cfa 100644 --- a/compiler/rustc_query_system/src/dep_graph/graph.rs +++ b/compiler/rustc_query_system/src/dep_graph/graph.rs @@ -1402,6 +1402,10 @@ fn panic_on_forbidden_read<D: Deps>(data: &DepGraphData<D>, dep_node_index: DepN panic!( "Error: trying to record dependency on DepNode {dep_node} in a \ - context that does not allow it (e.g. during query deserialization)." + context that does not allow it (e.g. during query deserialization). \ + The most common case of recording a dependency on a DepNode `foo` is \ + when the correspondng query `foo` is invoked. Invoking queries is not \ + allowed as part of loading something from the incremental on-disk cache. \ + See <https://github.com/rust-lang/rust/pull/91919>." ) } |