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Fix correctness of optimization

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bjorn3 2020-01-25 16:24:15 +01:00
parent 9cfb9470c5
commit 242f2e3c75
1 changed files with 1 additions and 1 deletions
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src/abi/mod.rs
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@ -363,7 +363,7 @@ pub fn codegen_fn_prelude(fx: &mut FunctionCx<'_, '_, impl Backend>, start_ebb:
ParamEnv::reveal_all(),
local_decl.source_info.span,
);
if local_decl.mutability == mir::Mutability::Not && internally_mutable {
if local_decl.mutability == mir::Mutability::Not && !internally_mutable {
// We wont mutate this argument, so it is fine to borrow the backing storage
// of this argument, to prevent a copy.