Runtime safety check added in comptime block

[xhook]

Zig Version

0.13.0-dev.266+0b0625ccf

Steps to Reproduce and Observed Behavior

I am learning Zig by experimenting with writing a simple neural network code and experience a compiler crash. I tried to distill the code to the very minimum, that causes the crash. This code is not entirely correct, and being frank, I don't even know if it should compile at all. But certainly it should not crash.

const std = @import("std");

pub fn Layer(comptime M: usize, comptime N: usize) type {
    return struct {
        const Self = @This();
        neurons: [N*M]f32,
    };
}

fn MLP(comptime N: usize, comptime nin: usize, comptime nouts: [N]usize) type {
    const sz = [_]usize{nin} ++ nouts;
    return struct {
        const Self = @This();

        layers: [N]*anyopaque,

        pub fn init() !Self {
            var layers = [_]*anyopaque{undefined} ** N;
            for (0..N) |i| {
                const layer_type = Layer(sz[i], sz[i + 1]);
                layers[i] = try std.heap.page_allocator.create(layer_type);
            }
            return Self{ .layers = layers };
        }
    };
}

pub fn main() !void {
    const mlp = MLP(3, 2, [_]usize{ 16, 16, 1 }).init();
    std.debug.print("mlp.layers.len {}\n", .{mlp.layers.len});
}

By running the above code I get the following error:

user@xi:~/Projects/zigrad$ ~/Projects/zig/build_master/stage3/bin/zig run src/zig_crash.zig
thread 81111 panic: reached unreachable code
Analyzing src/zig_crash.zig: zig_crash.zig:MLP(3,2,.{ 16, 16, 1 }).init
      %82 = extended(closure_get(1)) 
      %83 = dbg_stmt(4, 44)
    > %84 = elem_val_node(%82, %73) 
      %85 = break_inline(%81, %84)
    For full context, use the command
      zig ast-check -t src/zig_crash.zig

  in src/zig_crash.zig: zig_crash.zig:MLP(3,2,.{ 16, 16, 1 }).init
    > %81 = call(.auto, %79, [
        {%82..%85},
        {%86..%91},
      ]) 
  in src/zig_crash.zig: zig_crash.zig:MLP(3,2,.{ 16, 16, 1 }).init
    > %75 = condbr(%74, {%77..%110}, {%111}) 
  in src/zig_crash.zig: zig_crash.zig:MLP(3,2,.{ 16, 16, 1 }).init
    > %76 = block({%74, %75}) 
  in src/zig_crash.zig: zig_crash.zig:MLP(3,2,.{ 16, 16, 1 }).init
    > %72 = loop({%73..%114}) 

/home/user/Projects/zig/lib/std/debug.zig:403:14: 0x18182cc in assert (zig)
    if (!ok) unreachable; // assertion failure
             ^
/home/user/Projects/zig/src/Sema.zig:27184:11: 0x2743f45 in panicIndexOutOfBounds (zig)
    assert(!parent_block.is_comptime);
          ^
/home/user/Projects/zig/src/Sema.zig:28786:43: 0x21d99a7 in elemValArray (zig)
            try sema.panicIndexOutOfBounds(block, src, elem_index, len_inst, cmp_op);
                                          ^
/home/user/Projects/zig/src/Sema.zig:28583:43: 0x2a81b4e in elemVal (zig)
        .Array => return sema.elemValArray(block, src, indexable_src, indexable, elem_index_src, elem_index, oob_safety),
                                          ^
/home/user/Projects/zig/src/Sema.zig:10848:24: 0x25c724a in zirElemValNode (zig)
    return sema.elemVal(block, src, array, elem_index, elem_index_src, true);
                       ^
/home/user/Projects/zig/src/Sema.zig:1028:69: 0x20b196a in analyzeBodyInner (zig)
            .elem_val_node                => try sema.zirElemValNode(block, inst),
                                                                    ^
/home/user/Projects/zig/src/Sema.zig:910:30: 0x1de0187 in analyzeInlineBody (zig)
    if (sema.analyzeBodyInner(block, body)) |_| {
                             ^
/home/user/Projects/zig/src/Sema.zig:936:39: 0x1b396ae in resolveInlineBody (zig)
    return (try sema.analyzeInlineBody(block, body, break_target)) orelse .unreachable_value;
                                      ^
/home/user/Projects/zig/src/Sema.zig:7426:65: 0x2cae5b4 in analyzeArg (zig)
                const uncoerced_arg = try sema.resolveInlineBody(block, arg_body, zir_call.call_inst);
                                                                ^
/home/user/Projects/zig/src/Sema.zig:8116:56: 0x2cac915 in analyzeInlineCallArg (zig)
            const casted_arg = try args_info.analyzeArg(ics.caller(), arg_block, arg_i.*, Type.fromInterned(param_ty), func_ty_info, func_inst);
                                                       ^
/home/user/Projects/zig/src/Sema.zig:7827:62: 0x27313e2 in analyzeCall (zig)
            const opt_noreturn_ref = try analyzeInlineCallArg(
                                                             ^
/home/user/Projects/zig/src/Sema.zig:7136:43: 0x25c22ee in zirCall__anon_93341 (zig)
    const call_inst = try sema.analyzeCall(block, func, func_ty, callee_src, call_src, modifier, ensure_result_used, args_info, call_dbg_node, .call);
                                          ^
/home/user/Projects/zig/src/Sema.zig:1014:62: 0x20b1057 in analyzeBodyInner (zig)
            .call                         => try sema.zirCall(block, inst, .direct),
                                                             ^
/home/user/Projects/zig/src/Sema.zig:874:26: 0x2acc31f in analyzeBodyRuntimeBreak (zig)
    sema.analyzeBodyInner(block, body) catch |err| switch (err) {
                         ^
/home/user/Projects/zig/src/Sema.zig:19287:37: 0x2677c67 in zirCondbr (zig)
    try sema.analyzeBodyRuntimeBreak(&sub_block, then_body);
                                    ^
/home/user/Projects/zig/src/Sema.zig:1693:39: 0x20bd47a in analyzeBodyInner (zig)
                    try sema.zirCondbr(block, inst);
                                      ^
/home/user/Projects/zig/src/Sema.zig:6176:34: 0x2acc9cb in resolveBlockBody (zig)
        if (sema.analyzeBodyInner(child_block, body)) |_| {
                                 ^
/home/user/Projects/zig/src/Sema.zig:6153:33: 0x267cfae in zirBlock (zig)
    return sema.resolveBlockBody(parent_block, src, &child_block, body, inst, &label.merges);
                                ^
/home/user/Projects/zig/src/Sema.zig:1559:49: 0x20bf4d0 in analyzeBodyInner (zig)
                    break :blk try sema.zirBlock(block, inst, tags[@intFromEnum(inst)] == .block_comptime);
                                                ^
/home/user/Projects/zig/src/Sema.zig:5968:30: 0x267427f in zirLoop (zig)
    try sema.analyzeBodyInner(&loop_block, body);
                             ^
/home/user/Projects/zig/src/Sema.zig:1534:68: 0x20bc316 in analyzeBodyInner (zig)
                if (!block.is_comptime) break :blk try sema.zirLoop(block, inst);
                                                                   ^
/home/user/Projects/zig/src/Sema.zig:892:26: 0x20afc91 in analyzeFnBody (zig)
    sema.analyzeBodyInner(block, body) catch |err| switch (err) {
                         ^
/home/user/Projects/zig/src/Module.zig:4633:23: 0x1d9dc5f in analyzeFnBody (zig)
    sema.analyzeFnBody(&inner_block, fn_info.body) catch |err| switch (err) {
                      ^
/home/user/Projects/zig/src/Module.zig:3143:32: 0x1b07fc8 in ensureFuncBodyAnalyzed (zig)
    var air = zcu.analyzeFnBody(func_index, sema_arena) catch |err| switch (err) {
                               ^
/home/user/Projects/zig/src/Compilation.zig:3414:42: 0x1b05ae2 in processOneJob (zig)
            module.ensureFuncBodyAnalyzed(func) catch |err| switch (err) {
                                         ^
/home/user/Projects/zig/src/Compilation.zig:3354:30: 0x193ac7f in performAllTheWork (zig)
            try processOneJob(comp, work_item, main_progress_node);
                             ^
/home/user/Projects/zig/src/Compilation.zig:2132:31: 0x1936683 in update (zig)
    try comp.performAllTheWork(main_progress_node);
                              ^
/home/user/Projects/zig/src/main.zig:4489:24: 0x19678af in updateModule (zig)
        try comp.update(main_progress_node);
                       ^
/home/user/Projects/zig/src/main.zig:3411:17: 0x19d0352 in buildOutputType (zig)
    updateModule(comp, color) catch |err| switch (err) {
                ^
/home/user/Projects/zig/src/main.zig:270:31: 0x181a7f9 in mainArgs (zig)
        return buildOutputType(gpa, arena, args, .run);
                              ^
/home/user/Projects/zig/src/main.zig:208:20: 0x1817495 in main (zig)
    return mainArgs(gpa, arena, args);
                   ^
/home/user/Projects/zig/lib/std/start.zig:524:37: 0x1816f2e in main (zig)
            const result = root.main() catch |err| {
                                    ^
../sysdeps/nptl/libc_start_call_main.h:58:16: 0x75ea25429d8f in __libc_start_call_main (../sysdeps/x86/libc-start.c)
../csu/libc-start.c:392:3: 0x75ea25429e3f in __libc_start_main_impl (../sysdeps/x86/libc-start.c)
???:?:?: 0x1816b74 in ??? (???)
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

Tried also running it on v0.12.0 as well as 0.12.x branch. The result is the same.

Expected Behavior

The compiler should give a compilation error or compile the code.

[Pyrolistical]

No repo on windows.

zig-windows-x86_64-0.13.0-dev.266+0b0625ccf\zig run wat.zig
wat.zig:30:49: error: error union type '@typeInfo(@typeInfo(@TypeOf(wat.MLP(3,2,.{ 16, 16, 1 }).init)).Fn.return_type.?).ErrorUnion.error_set!wat.MLP(3,2,.{ 16, 16, 1 })' does not support field access
    std.debug.print("mlp.layers.len {}\n", .{mlp.layers.len});
                                             ~~~^~~~~~~
wat.zig:30:49: note: consider using 'try', 'catch', or 'if'
referenced by:
    callMain: zig-windows-x86_64-0.13.0-dev.266+0b0625ccf\lib\std\start.zig:524:32
    WinStartup: zig-windows-x86_64-0.13.0-dev.266+0b0625ccf\lib\std\start.zig:363:45
    remaining reference traces hidden; use '-freference-trace' to see all reference traces
wat.zig:20:44: error: unable to evaluate comptime expression
                const layer_type = Layer(sz[i], sz[i + 1]);
                                         ~~^~~
wat.zig:20:45: note: operation is runtime due to this operand
                const layer_type = Layer(sz[i], sz[i + 1]);
                                            ^

[WillLillis]

I was able to reproduce on Ubuntu 22.04 from 0b0625ccf4:

0b0625ccf4

``` run └─ run zig_crash └─ zig build-exe zig_crash Debug native failure error: thread 975505 panic: reached unreachable code Analyzing src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init %82 = extended(closure_get(1)) node_offset:20:42 to :20:44 %83 = dbg_stmt(4, 44) > %84 = elem_val_node(%82, %73) node_offset:20:42 to :20:47 %85 = break_inline(%81, %84) For full context, use the command zig ast-check -t src/main.zig in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %81 = call(.auto, %79, [ {%82..%85}, {%86..%91}, ]) node_offset:20:36 to :20:59 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %75 = condbr(%74, {%77..%110}, {%111}) node_offset:19:13 to :19:16 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %76 = block({%74, %75}) node_offset:19:13 to :19:16 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %72 = loop({%73..%114}) node_offset:19:13 to :19:16 /home/lillis/zig/lib/std/debug.zig:403:14: 0x596787c in assert (zig) if (!ok) unreachable; // assertion failure ^ /home/lillis/zig/src/Sema.zig:27184:11: 0x68934f5 in panicIndexOutOfBounds (zig) assert(!parent_block.is_comptime); ^ /home/lillis/zig/src/Sema.zig:28786:43: 0x6328f57 in elemValArray (zig) try sema.panicIndexOutOfBounds(block, src, elem_index, len_inst, cmp_op); ^ /home/lillis/zig/src/Sema.zig:28583:43: 0x6bd10fe in elemVal (zig) .Array => return sema.elemValArray(block, src, indexable_src, indexable, elem_index_src, elem_index, oob_safety), ^ /home/lillis/zig/src/Sema.zig:10848:24: 0x67167fa in zirElemValNode (zig) return sema.elemVal(block, src, array, elem_index, elem_index_src, true); ^ /home/lillis/zig/src/Sema.zig:1028:69: 0x6200f1a in analyzeBodyInner (zig) .elem_val_node => try sema.zirElemValNode(block, inst), ^ /home/lillis/zig/src/Sema.zig:910:30: 0x5f2f737 in analyzeInlineBody (zig) if (sema.analyzeBodyInner(block, body)) |_| { ^ /home/lillis/zig/src/Sema.zig:936:39: 0x5c88c5e in resolveInlineBody (zig) return (try sema.analyzeInlineBody(block, body, break_target)) orelse .unreachable_value; ^ /home/lillis/zig/src/Sema.zig:7426:65: 0x6dfdb64 in analyzeArg (zig) const uncoerced_arg = try sema.resolveInlineBody(block, arg_body, zir_call.call_inst); ^ /home/lillis/zig/src/Sema.zig:8116:56: 0x6dfbec5 in analyzeInlineCallArg (zig) const casted_arg = try args_info.analyzeArg(ics.caller(), arg_block, arg_i.*, Type.fromInterned(param_ty), func_ty_info, func_inst); ^ /home/lillis/zig/src/Sema.zig:7827:62: 0x6880992 in analyzeCall (zig) const opt_noreturn_ref = try analyzeInlineCallArg( ^ /home/lillis/zig/src/Sema.zig:7136:43: 0x671189e in zirCall__anon_93341 (zig) const call_inst = try sema.analyzeCall(block, func, func_ty, callee_src, call_src, modifier, ensure_result_used, args_info, call_dbg_node, .call); ^ /home/lillis/zig/src/Sema.zig:1014:62: 0x6200607 in analyzeBodyInner (zig) .call => try sema.zirCall(block, inst, .direct), ^ /home/lillis/zig/src/Sema.zig:874:26: 0x6c1b8cf in analyzeBodyRuntimeBreak (zig) sema.analyzeBodyInner(block, body) catch |err| switch (err) { ^ /home/lillis/zig/src/Sema.zig:19287:37: 0x67c7217 in zirCondbr (zig) try sema.analyzeBodyRuntimeBreak(&sub_block, then_body); ^ /home/lillis/zig/src/Sema.zig:1693:39: 0x620ca2a in analyzeBodyInner (zig) try sema.zirCondbr(block, inst); ^ /home/lillis/zig/src/Sema.zig:6176:34: 0x6c1bf7b in resolveBlockBody (zig) if (sema.analyzeBodyInner(child_block, body)) |_| { ^ /home/lillis/zig/src/Sema.zig:6153:33: 0x67cc55e in zirBlock (zig) return sema.resolveBlockBody(parent_block, src, &child_block, body, inst, &label.merges); ^ /home/lillis/zig/src/Sema.zig:1559:49: 0x620ea80 in analyzeBodyInner (zig) break :blk try sema.zirBlock(block, inst, tags[@intFromEnum(inst)] == .block_comptime); ^ /home/lillis/zig/src/Sema.zig:5968:30: 0x67c382f in zirLoop (zig) try sema.analyzeBodyInner(&loop_block, body); ^ /home/lillis/zig/src/Sema.zig:1534:68: 0x620b8c6 in analyzeBodyInner (zig) if (!block.is_comptime) break :blk try sema.zirLoop(block, inst); ^ /home/lillis/zig/src/Sema.zig:892:26: 0x61ff241 in analyzeFnBody (zig) sema.analyzeBodyInner(block, body) catch |err| switch (err) { ^ /home/lillis/zig/src/Module.zig:4633:23: 0x5eed20f in analyzeFnBody (zig) sema.analyzeFnBody(&inner_block, fn_info.body) catch |err| switch (err) { ^ /home/lillis/zig/src/Module.zig:3143:32: 0x5c57578 in ensureFuncBodyAnalyzed (zig) var air = zcu.analyzeFnBody(func_index, sema_arena) catch |err| switch (err) { ^ /home/lillis/zig/src/Compilation.zig:3414:42: 0x5c55092 in processOneJob (zig) module.ensureFuncBodyAnalyzed(func) catch |err| switch (err) { ^ /home/lillis/zig/src/Compilation.zig:3354:30: 0x5a8a22f in performAllTheWork (zig) try processOneJob(comp, work_item, main_progress_node); ^ /home/lillis/zig/src/Compilation.zig:2132:31: 0x5a85c33 in update (zig) try comp.performAllTheWork(main_progress_node); ^ /home/lillis/zig/src/main.zig:4091:36: 0x5b0074c in serve (zig) try comp.update(main_progress_node); ^ /home/lillis/zig/src/main.zig:3368:22: 0x5b1ee8f in buildOutputType (zig) try serve( ^ /home/lillis/zig/src/main.zig:262:31: 0x5969ab1 in mainArgs (zig) return buildOutputType(gpa, arena, args, .{ .build = .Exe }); ^ /home/lillis/zig/src/main.zig:208:20: 0x5966a45 in main (zig) return mainArgs(gpa, arena, args); ^ /home/lillis/zig/lib/std/start.zig:524:37: 0x59664de in main (zig) const result = root.main() catch |err| { ^ ???:?:?: 0x7f66dc461d8f in ??? (libc.so.6) Unwind information for `libc.so.6:0x7f66dc461d8f` was not available, trace may be incomplete error: the following command terminated unexpectedly: /home/lillis/zig/build-266/stage3/bin/zig build-exe -ODebug -Mroot=/home/lillis/projects/zig_crash/src/main.zig --cache-dir /home/lillis/projects/zig_crash/zig-cache --global-cache-dir /home/lillis/.cache/zig --name zig_crash --listen=- Build Summary: 2/7 steps succeeded; 1 failed (disable with --summary none) run transitive failure └─ run zig_crash transitive failure ├─ zig build-exe zig_crash Debug native failure └─ install transitive failure └─ install zig_crash transitive failure └─ zig build-exe zig_crash Debug native (reused) error: the following build command failed with exit code 1: /home/lillis/projects/zig_crash/zig-cache/o/079169a96abe2bbeacb8b7ac264a92cb/build /home/lillis/zig/build-266/stage3/bin/zig /home/lillis/projects/zig_crash /home/lillis/projects/zig_crash/zig-cache /home/lillis/.cache/zig --seed 0xa2b0d719 -Z4214ba78a95522ad run ```

as well as an older build from master branch commit 67455c5e70e86dbb7805ff9a415f1b13b14f36da:

67455c5e70

``` run └─ run zig_crash └─ zig build-exe zig_crash Debug native failure error: thread 931437 panic: reached unreachable code Analyzing src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init %82 = extended(closure_get(1)) node_offset:20:42 to :20:44 %83 = dbg_stmt(4, 44) > %84 = elem_val_node(%82, %73) node_offset:20:42 to :20:47 %85 = break_inline(%81, %84) For full context, use the command zig ast-check -t src/main.zig in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %81 = call(.auto, %79, [ {%82..%85}, {%86..%91}, ]) node_offset:20:36 to :20:59 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %75 = condbr(%74, {%77..%110}, {%111}) node_offset:19:13 to :19:16 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %76 = block({%74, %75}) node_offset:19:13 to :19:16 in src/main.zig: main.zig:MLP(3,2,.{ 16, 16, 1 }).init > %72 = loop({%73..%114}) node_offset:19:13 to :19:16 /home/lillis/zig/lib/std/debug.zig:403:14: 0x5cfc7bc in assert (zig) if (!ok) unreachable; // assertion failure ^ /home/lillis/zig/src/Sema.zig:27169:11: 0x6c12db5 in panicIndexOutOfBounds (zig) assert(!parent_block.is_comptime); ^ /home/lillis/zig/src/Sema.zig:28768:43: 0x66b54e7 in elemValArray (zig) try sema.panicIndexOutOfBounds(block, src, elem_index, len_inst, cmp_op); ^ /home/lillis/zig/src/Sema.zig:28565:43: 0x6f4ec7e in elemVal (zig) .Array => return sema.elemValArray(block, src, indexable_src, indexable, elem_index_src, elem_index, oob_safety), ^ /home/lillis/zig/src/Sema.zig:10833:24: 0x6a99c4a in zirElemValNode (zig) return sema.elemVal(block, src, array, elem_index, elem_index_src, true); ^ /home/lillis/zig/src/Sema.zig:1028:69: 0x658f029 in analyzeBodyInner (zig) .elem_val_node => try sema.zirElemValNode(block, inst), ^ /home/lillis/zig/src/Sema.zig:910:30: 0x62beaf7 in analyzeInlineBody (zig) if (sema.analyzeBodyInner(block, body)) |_| { ^ /home/lillis/zig/src/Sema.zig:936:39: 0x6019efe in resolveInlineBody (zig) return (try sema.analyzeInlineBody(block, body, break_target)) orelse .unreachable_value; ^ /home/lillis/zig/src/Sema.zig:7412:65: 0x71744cf in analyzeArg (zig) const uncoerced_arg = try sema.resolveInlineBody(block, arg_body, zir_call.call_inst); ^ /home/lillis/zig/src/Sema.zig:8102:56: 0x7172825 in analyzeInlineCallArg (zig) const casted_arg = try args_info.analyzeArg(ics.caller(), arg_block, arg_i.*, Type.fromInterned(param_ty), func_ty_info, func_inst); ^ /home/lillis/zig/src/Sema.zig:7813:62: 0x6c00242 in analyzeCall (zig) const opt_noreturn_ref = try analyzeInlineCallArg( ^ /home/lillis/zig/src/Sema.zig:7122:43: 0x6a94cee in zirCall__anon_93773 (zig) const call_inst = try sema.analyzeCall(block, func, func_ty, callee_src, call_src, modifier, ensure_result_used, args_info, call_dbg_node, .call); ^ /home/lillis/zig/src/Sema.zig:1014:62: 0x658e716 in analyzeBodyInner (zig) .call => try sema.zirCall(block, inst, .direct), ^ /home/lillis/zig/src/Sema.zig:874:26: 0x6f992cf in analyzeBodyRuntimeBreak (zig) sema.analyzeBodyInner(block, body) catch |err| switch (err) { ^ /home/lillis/zig/src/Sema.zig:19272:37: 0x6b4a717 in zirCondbr (zig) try sema.analyzeBodyRuntimeBreak(&sub_block, then_body); ^ /home/lillis/zig/src/Sema.zig:1693:39: 0x659ab39 in analyzeBodyInner (zig) try sema.zirCondbr(block, inst); ^ /home/lillis/zig/src/Sema.zig:6162:34: 0x6f9997b in resolveBlockBody (zig) if (sema.analyzeBodyInner(child_block, body)) |_| { ^ /home/lillis/zig/src/Sema.zig:6139:33: 0x6b4fa6e in zirBlock (zig) return sema.resolveBlockBody(parent_block, src, &child_block, body, inst, &label.merges); ^ /home/lillis/zig/src/Sema.zig:1559:49: 0x659cb8f in analyzeBodyInner (zig) break :blk try sema.zirBlock(block, inst, tags[@intFromEnum(inst)] == .block_comptime); ^ /home/lillis/zig/src/Sema.zig:5954:30: 0x6b46cef in zirLoop (zig) try sema.analyzeBodyInner(&loop_block, body); ^ /home/lillis/zig/src/Sema.zig:1534:68: 0x65999d5 in analyzeBodyInner (zig) if (!block.is_comptime) break :blk try sema.zirLoop(block, inst); ^ /home/lillis/zig/src/Sema.zig:892:26: 0x658d351 in analyzeFnBody (zig) sema.analyzeBodyInner(block, body) catch |err| switch (err) { ^ /home/lillis/zig/src/Module.zig:4633:23: 0x627e025 in analyzeFnBody (zig) sema.analyzeFnBody(&inner_block, fn_info.body) catch |err| switch (err) { ^ /home/lillis/zig/src/Module.zig:3143:32: 0x5ff1228 in ensureFuncBodyAnalyzed (zig) var air = zcu.analyzeFnBody(func_index, sema_arena) catch |err| switch (err) { ^ /home/lillis/zig/src/Compilation.zig:3414:42: 0x5feef32 in processOneJob (zig) module.ensureFuncBodyAnalyzed(func) catch |err| switch (err) { ^ /home/lillis/zig/src/Compilation.zig:3354:30: 0x5e1f14f in performAllTheWork (zig) try processOneJob(comp, work_item, main_progress_node); ^ /home/lillis/zig/src/Compilation.zig:2132:31: 0x5e1abb2 in update (zig) try comp.performAllTheWork(main_progress_node); ^ /home/lillis/zig/src/main.zig:4085:36: 0x5e955ec in serve (zig) try comp.update(main_progress_node); ^ /home/lillis/zig/src/main.zig:3362:22: 0x5eb3d2f in buildOutputType (zig) try serve( ^ /home/lillis/zig/src/main.zig:260:31: 0x5cfe9f1 in mainArgs (zig) return buildOutputType(gpa, arena, args, .{ .build = .Exe }); ^ /home/lillis/zig/src/main.zig:206:20: 0x5cfb985 in main (zig) return mainArgs(gpa, arena, args); ^ /home/lillis/zig/lib/std/start.zig:511:37: 0x5cfb41e in main (zig) const result = root.main() catch |err| { ^ ???:?:?: 0x7faccc06bd8f in ??? (libc.so.6) Unwind information for `libc.so.6:0x7faccc06bd8f` was not available, trace may be incomplete error: the following command terminated unexpectedly: /home/lillis/zig/build/stage3/bin/zig build-exe -ODebug -Mroot=/home/lillis/projects/zig_crash/src/main.zig --cache-dir /home/lillis/projects/zig_crash/zig-cache --global-cache-dir /home/lillis/.cache/zig --name zig_crash --listen=- Build Summary: 2/7 steps succeeded; 1 failed (disable with --summary none) run transitive failure └─ run zig_crash transitive failure ├─ zig build-exe zig_crash Debug native failure └─ install transitive failure └─ install zig_crash transitive failure └─ zig build-exe zig_crash Debug native (reused) error: the following build command failed with exit code 1: /home/lillis/projects/zig_crash/zig-cache/o/6941b1309374dc38b3da16ae3f31f289/build /home/lillis/zig/build/stage3/bin/zig /home/lillis/projects/zig_crash /home/lillis/projects/zig_crash/zig-cache /home/lillis/.cache/zig --seed 0xf1a8e47a -Z652b9a9fcae50346 run ```