diff --git a/src/compiler/crystal/compiler.cr b/src/compiler/crystal/compiler.cr
index 3cd21fae2a84..9a3c14148344 100644
--- a/src/compiler/crystal/compiler.cr
+++ b/src/compiler/crystal/compiler.cr
@@ -346,7 +346,12 @@ module Crystal
         object_arg = Process.quote_windows(object_names)
         output_arg = Process.quote_windows("/Fe#{output_filename}")
 
-        args = %(/nologo #{object_arg} #{output_arg} /link#{" /DEBUG:FULL" unless debug.none?} #{lib_flags} #{@link_flags}).gsub("\n", " ")
+        link_args = [] of String
+        link_args << "/DEBUG:FULL /PDBALTPATH:%_PDB%" unless debug.none?
+        link_args << lib_flags
+        @link_flags.try { |flags| link_args << flags }
+
+        args = %(/nologo #{object_arg} #{output_arg} /link #{link_args.join(' ')}).gsub("\n", " ")
         cmd = "#{CL} #{args}"
 
         if cmd.to_utf16.size > 32000
diff --git a/src/exception/call_stack/stackwalk.cr b/src/exception/call_stack/stackwalk.cr
index fb3ae4744233..c42977f9fa5f 100644
--- a/src/exception/call_stack/stackwalk.cr
+++ b/src/exception/call_stack/stackwalk.cr
@@ -23,7 +23,9 @@ struct Exception::CallStack
     # TODO: figure out if and when to call SymCleanup (it cannot be done in
     # `at_exit` because unhandled exceptions in `main_user_code` are printed
     # after those handlers)
-    if LibC.SymInitializeW(LibC.GetCurrentProcess, nil, 1) == 0
+    executable_path = Process.executable_path
+    executable_path_ptr = executable_path ? File.dirname(executable_path).to_utf16.to_unsafe : Pointer(LibC::WCHAR).null
+    if LibC.SymInitializeW(LibC.GetCurrentProcess, executable_path_ptr, 1) == 0
       raise RuntimeError.from_winerror("SymInitializeW")
     end
     LibC.SymSetOptions(LibC.SymGetOptions | LibC::SYMOPT_UNDNAME | LibC::SYMOPT_LOAD_LINES | LibC::SYMOPT_FAIL_CRITICAL_ERRORS | LibC::SYMOPT_NO_PROMPTS)