Ubsan this newly discovered dead code
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1caa593cb6
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@ -399,10 +399,7 @@ impl CodegenContext {
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}
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struct DiagnosticHandlers<'a> {
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#[allow(dead_code)]
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// This value is not actually dead, llcx has pointers to it and needs these pointers to be alive
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// until Drop is executed on this object
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inner: Box<(&'a CodegenContext, &'a Handler)>,
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data: *mut (&'a CodegenContext, &'a Handler),
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llcx: ContextRef,
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}
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@ -410,24 +407,22 @@ impl<'a> DiagnosticHandlers<'a> {
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fn new(cgcx: &'a CodegenContext,
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handler: &'a Handler,
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llcx: ContextRef) -> DiagnosticHandlers<'a> {
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let data = Box::new((cgcx, handler));
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let data = Box::into_raw(Box::new((cgcx, handler)));
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unsafe {
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let arg = &*data as &(_, _) as *const _ as *mut _;
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llvm::LLVMRustSetInlineAsmDiagnosticHandler(llcx, inline_asm_handler, arg);
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llvm::LLVMContextSetDiagnosticHandler(llcx, diagnostic_handler, arg);
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}
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DiagnosticHandlers {
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inner: data,
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llcx: llcx,
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llvm::LLVMRustSetInlineAsmDiagnosticHandler(llcx, inline_asm_handler, data as *mut _);
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llvm::LLVMContextSetDiagnosticHandler(llcx, diagnostic_handler, data as *mut _);
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}
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DiagnosticHandlers { data, llcx }
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}
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}
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impl<'a> Drop for DiagnosticHandlers<'a> {
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fn drop(&mut self) {
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use std::ptr::null_mut;
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unsafe {
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llvm::LLVMRustSetInlineAsmDiagnosticHandler(self.llcx, inline_asm_handler, 0 as *mut _);
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llvm::LLVMContextSetDiagnosticHandler(self.llcx, diagnostic_handler, 0 as *mut _);
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llvm::LLVMRustSetInlineAsmDiagnosticHandler(self.llcx, inline_asm_handler, null_mut());
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llvm::LLVMContextSetDiagnosticHandler(self.llcx, diagnostic_handler, null_mut());
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drop(Box::from_raw(self.data));
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}
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}
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}
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