Compiler segfaults / starts printing corrupt characters to terminal when compiling infinitely recursive code.

[ItsMeSamey]

Zig Version

0.14.1 and 0.15.0-dev.847+850655f06

Steps to Reproduce and Observed Behavior

when compiling the following code with zig test 1.zig

1.zig

const std = @import("std");

const Options = struct {
  T: type,
  U: type = void,
  depth: comptime_int = 0,
};

fn GetSkeleton(options: Options) type {
  comptime var T = options.T;
  while (switch (@typeInfo(T)) {
    .pointer, .optional, .array, .vector => true,
    else => false,
  }) T = std.meta.Child(T);
  
  const info = @typeInfo(T).@"struct";
  return opaque {
    pub const Sub = blk: {
      var sub: [info.fields.len]type = undefined;
      for (info.fields, 0..) |f, i| sub[i] = GetSkeleton(.{ .T = f.type, .U = @This(), .depth = options.depth + 1 });
      break :blk sub;
    };
  };
}

const Recursive = struct {
  self: *@This(),
};

fn printRecursive(T: type) void {
  std.debug.print("Self: {any}\n", .{T});
  inline for (T.Sub) |s| printRecursive(s);
}

test printRecursive {
  printRecursive(GetSkeleton(.{ .T = Recursive, .depth = 0, }));
}

the compiler starts printing illegal / garbage characters to terminal (for 1.14.1).

for example

zig test 1.zig
[18481] Semantic Analysis
tq a+æ�4æaBC��HæaSæ�^�k�W�j�n�k�uæa|æ
mq lV
^C2620] Semantic Analysis

 zig test 1.zig
[21313] Semantic Analysis
[15724] Code Generation
mq CଚCsD@
[29380] Semantic Analysis
[76020] Semantic Analysis
^C1312] Code Generation

and here is a part of capture from script -q -c "zig test 1.zig" file.txt.
I cleaned up some formatting characters but some are still presnt.

[345701] Semantic Analysis
�(0mq�(B 
[214782] Code Generation

[345876] Semantic Analysis
�(0mq�(B ITSETI_B
[214891] Code Generation

[346298] Semantic Analysis
�(0mq�(B E_INDEX
[215153] Code Generation

[346599] Semantic Analysis
�(0mq�(B £<
[215343] Code Generation

Although i know nothing about it but these seem like the contents of the compiler's memory.

Sometimes (i only observed this once with 0.15.0-dev.847+850655f06), compiler segfaults

/tmp/tmp ❯❯ zignew test 1.zig
Segmentation fault (core dumped)
/tmp/tmp ❯❯ ^C__anon_60698

Expected Behavior

The compiler should not print invalid characters to the terminal or segfault.