pietroalbini/rust-regressions.md Secret

## rust-regressions.md

      
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              rust-regressions.md
            
          
    User reported stable regressions

This gist contains a summary of all the regressions reported by users of Rust stable after its release. It only covers Rust 1.35.0 to Rust 1.38.0.
1.38.0


Broke valid code:

#65618: Criterion benchmarks hang with target-cpu=znver1
#65391: rust-lld since 1.38 overlaps .text with .rodata for embedded arm target


Worse performance or error messages regression:

#65970: Using retain() on a vector a lot slower in version 1.38.0 than 1.36.0
#65561: ICE when using 'impl Trait' with an infinity recursive function
#65383: Could not find enclosing breakable with id HirId


1.37.0


Broke valid code:

#64453: ICE: borrowck/check_loans: assertion failed: self.bccx.region_scope_tree.scopes_intersect(...)
#65610: dylib shared libraries will not make public symbols that may be necessary to link inlined code
#64340: Linking issue with Rust 1.37.0


1.36.0


Broke valid code:

#62770: Minor 1.36 rustdoc regression: ] after a link is not treated as an escape
#62649: internal compiler error: src/librustc/dep_graph/graph.rs:688: DepNode Hir(...) should have been pre-allocated but wasn't.


Worse performance or worse error messages:

#63364: ICE when iterating over a u16 range whose bounds exceed 64k
#62439: 1.65x performance regression from 1.35.0 to 1.36.0


1.35.0


Worse performance or worse error messages:

#63430: [ICE] C-variadic functions are only valid with one or more fixed arguments
#62430: ICE: Rust spins when referencing associated types in where clause
#61944: internal compiler error: unexpected panic on 7 line double ref program
#61858: rustc runs out of memory when compiling an if statement with no block, enclosed in parentheses
#61623: rustc panic due to reference passed instead of mut reference