`coverageinfo` query needs to use the same MIR as codegen

I ran into an error trying to fix dead block coverage and realized the
`coverageinfo` query is getting a different MIR compared to the
codegenned MIR, which can sometimes be a problem during mapgen.

I changed that query to use the `InstandeDef` (which includes the
generic parameter substitutions, prosibly specific to const params)
instead of the `DefId` (without unknown/default const substitutions).

1 files changed, 2 insertions, 3 deletions

diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 3c5440f5b68..e0dd8d5806e 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -335,10 +335,9 @@ rustc_queries! {
 
     /// Returns coverage summary info for a function, after executing the `InstrumentCoverage`
     /// MIR pass (assuming the -Zinstrument-coverage option is enabled).
-    query coverageinfo(key: DefId) -> mir::CoverageInfo {
-        desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key) }
+    query coverageinfo(key: ty::InstanceDef<'tcx>) -> mir::CoverageInfo {
+        desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key.def_id()) }
         storage(ArenaCacheSelector<'tcx>)
-        cache_on_disk_if { key.is_local() }
     }
 
     /// Returns the name of the file that contains the function body, if instrumented for coverage.