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| author | LemonBoy <thatlemon@gmail.com> | 2019-11-04 15:09:11 +0100 |
|---|---|---|
| committer | LemonBoy <thatlemon@gmail.com> | 2019-11-04 20:33:41 +0100 |
| commit | c47211cc60a826837191fbb87b32f0baacb167cb (patch) | |
| tree | a57056e838fabfb5ac51cffed26bee084402affa /src | |
| parent | 2b4bf1e7ced151482ce741788eadcb39f6d60f72 (diff) | |
| download | zig-c47211cc60a826837191fbb87b32f0baacb167cb.tar.gz zig-c47211cc60a826837191fbb87b32f0baacb167cb.zip | |
Prevent crash when slicing undefined ptr to slice
Fixes #3534
Diffstat (limited to 'src')
| -rw-r--r-- | src/ir.cpp | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/ir.cpp b/src/ir.cpp index ea87999454..211af9a758 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -22949,12 +22949,20 @@ static IrInstruction *ir_analyze_instruction_slice(IrAnalyze *ira, IrInstruction if (parent_ptr == nullptr) return ira->codegen->invalid_instruction; - array_val = const_ptr_pointee(ira, ira->codegen, parent_ptr, instruction->base.source_node); - if (array_val == nullptr) - return ira->codegen->invalid_instruction; - rel_end = child_array_type->data.array.len; - abs_offset = 0; + if (parent_ptr->special == ConstValSpecialUndef) { + array_val = nullptr; + abs_offset = 0; + rel_end = SIZE_MAX; + ptr_is_undef = true; + } else { + array_val = const_ptr_pointee(ira, ira->codegen, parent_ptr, instruction->base.source_node); + if (array_val == nullptr) + return ira->codegen->invalid_instruction; + + rel_end = child_array_type->data.array.len; + abs_offset = 0; + } } else { array_val = const_ptr_pointee(ira, ira->codegen, &ptr_ptr->value, instruction->base.source_node); if (array_val == nullptr) |