In #115748 I got a test failure in tests/debuginfo/function-names.rs: function_names::const_generic_fn_non_int<{CONST#ad91263f6d2dd96e}> changed to static fn function_names::const_generic_fn_non_int<{CONST#73a38766b652ae7d}>. That PR leads to some new AllocIds being generated which shifts some IDs around, so it seems like the AllocId are affecting the function name here. @oli-obk was confused by this since with valtrees, shouldn't our function names be stable now? Indeed AllocId are not very stable at all so it seems potentially problematic if they are relevant for function names. The underlying function call is const_generic_fn_non_int::<{ () }> so this is not a very complicated valtree. ;)

Cc @rust-lang/project-const-generics