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Add more context to the forbidden dep-graph read ICE error message.

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This commit is contained in:
Michael Woerister 2024-04-22 14:54:28 +02:00
parent c373ec07c4
commit 6146a51f17
1 changed files with 5 additions and 1 deletions
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6
compiler/rustc_query_system/src/dep_graph/graph.rs
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@ -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>."
)
}