diff --git a/lib/compiler/aro/aro/Diagnostics.zig b/lib/compiler/aro/aro/Diagnostics.zig
index 17d2e9e09b..ed40dc3521 100644
--- a/lib/compiler/aro/aro/Diagnostics.zig
+++ b/lib/compiler/aro/aro/Diagnostics.zig
@@ -562,82 +562,3 @@ fn addMessage(d: *Diagnostics, msg: Message) Compilation.Error!void {
         },
     }
 }
-
-const ErrorBundle = std.zig.ErrorBundle;
-
-pub fn toErrorBundle(
-    d: *const Diagnostics,
-    gpa: std.mem.Allocator,
-    fail_msg: ?[]const u8,
-) !ErrorBundle {
-    @branchHint(.cold);
-
-    var bundle: ErrorBundle.Wip = undefined;
-    try bundle.init(gpa);
-    errdefer bundle.deinit();
-
-    if (fail_msg) |msg| {
-        try bundle.addRootErrorMessage(.{
-            .msg = try bundle.addString(msg),
-        });
-    }
-
-    var cur_err: ?ErrorBundle.ErrorMessage = null;
-    var cur_notes: std.ArrayList(ErrorBundle.ErrorMessage) = .empty;
-    defer cur_notes.deinit(gpa);
-    for (d.output.to_list.messages.items) |msg| {
-        switch (msg.kind) {
-            .off, .warning => {
-                if (cur_err) |err| {
-                    try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
-                    // Clear the current error so that notes don't bleed into unassociated errors
-                    cur_err = null;
-                }
-                continue;
-            },
-            .note => if (cur_err == null) continue,
-            .@"fatal error", .@"error" => {},
-        }
-
-        const src_loc = src_loc: {
-            if (msg.location) |location| {
-                break :src_loc try bundle.addSourceLocation(.{
-                    .src_path = try bundle.addString(location.path),
-                    .line = location.line_no - 1, // 1-based -> 0-based
-                    .column = location.col - 1, // 1-based -> 0-based
-                    .span_start = location.width,
-                    .span_main = location.width,
-                    .span_end = location.width,
-                    .source_line = try bundle.addString(location.line),
-                });
-            }
-            break :src_loc ErrorBundle.SourceLocationIndex.none;
-        };
-
-        switch (msg.kind) {
-            .@"fatal error", .@"error" => {
-                if (cur_err) |err| {
-                    try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
-                }
-                cur_err = .{
-                    .msg = try bundle.addString(msg.text),
-                    .src_loc = src_loc,
-                };
-                cur_notes.clearRetainingCapacity();
-            },
-            .note => {
-                cur_err.?.notes_len += 1;
-                try cur_notes.append(gpa, .{
-                    .msg = try bundle.addString(msg.text),
-                    .src_loc = src_loc,
-                });
-            },
-            .off, .warning => unreachable,
-        }
-    }
-    if (cur_err) |err| {
-        try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
-    }
-
-    return try bundle.toOwnedBundle("");
-}
diff --git a/lib/compiler/resinator/main.zig b/lib/compiler/resinator/main.zig
index a0b4353a9f..ce8532ae9f 100644
--- a/lib/compiler/resinator/main.zig
+++ b/lib/compiler/resinator/main.zig
@@ -13,6 +13,7 @@ const cvtres = @import("cvtres.zig");
 const hasDisjointCodePage = @import("disjoint_code_page.zig").hasDisjointCodePage;
 const fmtResourceType = @import("res.zig").NameOrOrdinal.fmtResourceType;
 const aro = @import("aro");
+const compiler_util = @import("../util.zig");
 
 pub fn main() !void {
     var gpa: std.heap.GeneralPurposeAllocator(.{}) = .init;
@@ -671,7 +672,11 @@ const ErrorHandler = union(enum) {
     ) !void {
         switch (self.*) {
             .server => |*server| {
-                var error_bundle = try comp.diagnostics.toErrorBundle(allocator, fail_msg);
+                var error_bundle = try compiler_util.aroDiagnosticsToErrorBundle(
+                    comp.diagnostics,
+                    allocator,
+                    fail_msg,
+                );
                 defer error_bundle.deinit(allocator);
 
                 try server.serveErrorBundle(error_bundle);
diff --git a/lib/compiler/translate-c/main.zig b/lib/compiler/translate-c/main.zig
index bdf776af56..3a3fd7577e 100644
--- a/lib/compiler/translate-c/main.zig
+++ b/lib/compiler/translate-c/main.zig
@@ -3,6 +3,7 @@ const assert = std.debug.assert;
 const mem = std.mem;
 const process = std.process;
 const aro = @import("aro");
+const compiler_util = @import("../util.zig");
 const Translator = @import("Translator.zig");
 
 const fast_exit = @import("builtin").mode != .Debug;
@@ -88,7 +89,11 @@ pub fn main() u8 {
 }
 
 fn serveErrorBundle(arena: std.mem.Allocator, diagnostics: *const aro.Diagnostics) !void {
-    const error_bundle = try diagnostics.toErrorBundle(arena, "translation failure");
+    const error_bundle = try compiler_util.aroDiagnosticsToErrorBundle(
+        diagnostics,
+        arena,
+        "translation failure",
+    );
     var stdout_buffer: [1024]u8 = undefined;
     var stdout_writer = std.fs.File.stdout().writer(&stdout_buffer);
     var server: std.zig.Server = .{
diff --git a/lib/compiler/util.zig b/lib/compiler/util.zig
new file mode 100644
index 0000000000..63a078cead
--- /dev/null
+++ b/lib/compiler/util.zig
@@ -0,0 +1,81 @@
+//! Utilities shared between compiler sub-commands
+const std = @import("std");
+const aro = @import("aro");
+const ErrorBundle = std.zig.ErrorBundle;
+
+pub fn aroDiagnosticsToErrorBundle(
+    d: *const aro.Diagnostics,
+    gpa: std.mem.Allocator,
+    fail_msg: ?[]const u8,
+) !ErrorBundle {
+    @branchHint(.cold);
+
+    var bundle: ErrorBundle.Wip = undefined;
+    try bundle.init(gpa);
+    errdefer bundle.deinit();
+
+    if (fail_msg) |msg| {
+        try bundle.addRootErrorMessage(.{
+            .msg = try bundle.addString(msg),
+        });
+    }
+
+    var cur_err: ?ErrorBundle.ErrorMessage = null;
+    var cur_notes: std.ArrayList(ErrorBundle.ErrorMessage) = .empty;
+    defer cur_notes.deinit(gpa);
+    for (d.output.to_list.messages.items) |msg| {
+        switch (msg.kind) {
+            .off, .warning => {
+                if (cur_err) |err| {
+                    try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
+                    // Clear the current error so that notes don't bleed into unassociated errors
+                    cur_err = null;
+                }
+                continue;
+            },
+            .note => if (cur_err == null) continue,
+            .@"fatal error", .@"error" => {},
+        }
+
+        const src_loc = src_loc: {
+            if (msg.location) |location| {
+                break :src_loc try bundle.addSourceLocation(.{
+                    .src_path = try bundle.addString(location.path),
+                    .line = location.line_no - 1, // 1-based -> 0-based
+                    .column = location.col - 1, // 1-based -> 0-based
+                    .span_start = location.width,
+                    .span_main = location.width,
+                    .span_end = location.width,
+                    .source_line = try bundle.addString(location.line),
+                });
+            }
+            break :src_loc ErrorBundle.SourceLocationIndex.none;
+        };
+
+        switch (msg.kind) {
+            .@"fatal error", .@"error" => {
+                if (cur_err) |err| {
+                    try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
+                }
+                cur_err = .{
+                    .msg = try bundle.addString(msg.text),
+                    .src_loc = src_loc,
+                };
+                cur_notes.clearRetainingCapacity();
+            },
+            .note => {
+                cur_err.?.notes_len += 1;
+                try cur_notes.append(gpa, .{
+                    .msg = try bundle.addString(msg.text),
+                    .src_loc = src_loc,
+                });
+            },
+            .off, .warning => unreachable,
+        }
+    }
+    if (cur_err) |err| {
+        try bundle.addRootErrorMessageWithNotes(err, cur_notes.items);
+    }
+
+    return try bundle.toOwnedBundle("");
+}