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| author | LemonBoy <thatlemon@gmail.com> | 2020-01-29 19:08:15 +0100 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2020-01-29 16:05:14 -0500 |
| commit | 59bc1d272120bd860cc3cd1f894a2a4e08fc1f3f (patch) | |
| tree | 0b7eb6fd36762579a141d152b10e0d60b540b217 /src/ir.cpp | |
| parent | 4fad16284ec30962689723c7eaca05a77df14673 (diff) | |
| download | zig-59bc1d272120bd860cc3cd1f894a2a4e08fc1f3f.tar.gz zig-59bc1d272120bd860cc3cd1f894a2a4e08fc1f3f.zip | |
Fix edge case in switch with single else
ir_gen_switch_expr doesn't set the switch_br field at all if there are
zero cases, detect this situation and handle it gracefully.
Closes #4322
Diffstat (limited to 'src/ir.cpp')
| -rw-r--r-- | src/ir.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/ir.cpp b/src/ir.cpp index fb7613cf90..149c8fbdc9 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -22768,7 +22768,9 @@ static IrInstGen *ir_analyze_instruction_switch_else_var(IrAnalyze *ira, } // Make note of the errors handled by other cases ErrorTableEntry **errors = allocate<ErrorTableEntry *>(ira->codegen->errors_by_index.length); - for (size_t case_i = 0; case_i < instruction->switch_br->case_count; case_i += 1) { + // We may not have any case in the switch if this is a lone else + const size_t switch_cases = instruction->switch_br ? instruction->switch_br->case_count : 0; + for (size_t case_i = 0; case_i < switch_cases; case_i += 1) { IrInstSrcSwitchBrCase *br_case = &instruction->switch_br->cases[case_i]; IrInstGen *case_expr = br_case->value->child; if (case_expr->value->type->id == ZigTypeIdErrorSet) { |