continue inside inline for cause compiler crash #2604
Description
Version : 0.4.0+d1b6f29d
This is similar to #834.
const std = @import("std");
const ints = []u32{ 42, 1337, 0xdeadbeef };
fn do_thing(int: u32) error{IsALeet}!void {
std.debug.warn("{}\n", int);
if (int == 1337) return error.IsALeet;
}
pub fn main() void {
inline for (ints) |int| {
do_thing(int) catch |_| continue;
std.debug.warn("not a leet\n");
}
}The code above gives a compiler crash.
$ gdb zig
GNU gdb (GDB) Fedora 8.2-6.fc29
...
(gdb) run build-exe main.zig
Starting program: zig build-exe main.zig
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff634a220 in llvm::BasicBlock::getContext() const ()
(gdb) bt
#0 0x00007ffff634a220 in llvm::BasicBlock::getContext() const ()
#1 0x00007ffff63dea89 in llvm::BranchInst::BranchInst(llvm::BasicBlock*, llvm::BasicBlock*, llvm::Value*, llvm::Instruction*) ()
#2 0x00007ffff63761e8 in LLVMBuildCondBr ()
#3 0x00007ffff250249a in ir_render_instruction(CodeGen*, IrExecutable*, IrInstruction*) [clone .isra.206] ()
#4 0x00007ffff2503cf5 in do_code_gen(CodeGen*) ()
#5 0x00007ffff2507407 in codegen_build_and_link(CodeGen*) ()
#6 0x00007ffff24302bd in main ()
A if on the error union will give a comptime control flow inside runtime block error :
pub fn main() void {
inline for (ints) |int| {
if (do_thing(int)) |_| {}
else |_| { continue; }
std.debug.warn("not a leet\n");
}
}By the way, I don't think doing that should be an error since breaking on the inner block compile correctly, and is essentially the same thing.
pub fn main() void {
inline for (ints) |int| blk: {
do_thing(int) catch |_| break :blk;
std.debug.warn("not a leet\n");
}
} $ zig build-exe main.zig
$ ./main
42
not a leet
1337
3735928559
not a leet