diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ddbfd90b776db..b800f542bd393 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -217,7 +217,7 @@ jobs:
                 vulkan-headers \
                 wayland-protocols
             ./ci/build-freebsd.sh
-            meson test -C build
+            meson test -v -C build
 
   msys2:
     runs-on: windows-latest
diff --git a/ci/build-freebsd.sh b/ci/build-freebsd.sh
index c393fb25fee32..5168b67c183d3 100755
--- a/ci/build-freebsd.sh
+++ b/ci/build-freebsd.sh
@@ -10,6 +10,7 @@ export LDFLAGS="$LDFLAGS -L/usr/local/lib"
 meson setup build \
     --werror      \
     -Dc_args="-Wno-error=deprecated -Wno-error=deprecated-declarations" \
+    -Db_sanitize=address \
     -Diconv=disabled \
     -Dlibmpv=true \
     -Dlua=enabled \
diff --git a/sub/ass_mp.c b/sub/ass_mp.c
index 634681f2ec68c..fcd78ec352ac4 100644
--- a/sub/ass_mp.c
+++ b/sub/ass_mp.c
@@ -40,6 +40,8 @@
 #include "video/out/bitmap_packer.h"
 #include "video/mp_image.h"
 
+#include <stdio.h>
+
 // res_y should be track->PlayResY
 // It determines scaling of font sizes and more.
 void mp_ass_set_style(ASS_Style *style, double res_y,
@@ -55,6 +57,9 @@ void mp_ass_set_style(ASS_Style *style, double res_y,
         }
     }
 
+    printf("1\n");
+    fflush(stdout);
+
     // libass_font_size = FontSize * (window_height / res_y)
     // scale translates parameters from PlayResY=720 to res_y
     double scale = res_y / 720.0;
@@ -63,6 +68,9 @@ void mp_ass_set_style(ASS_Style *style, double res_y,
     style->PrimaryColour = MP_ASS_COLOR(opts->color);
     style->SecondaryColour = style->PrimaryColour;
     style->OutlineColour = MP_ASS_COLOR(opts->border_color);
+    printf("2\n");
+    fflush(stdout);
+
     if (opts->back_color.a) {
         style->BackColour = MP_ASS_COLOR(opts->back_color);
         style->BorderStyle = 4; // opaque box
@@ -70,18 +78,26 @@ void mp_ass_set_style(ASS_Style *style, double res_y,
         style->BackColour = MP_ASS_COLOR(opts->shadow_color);
         style->BorderStyle = 1; // outline
     }
-    style->Outline = opts->border_size * scale;
-    style->Shadow = opts->shadow_offset * scale;
-    style->Spacing = opts->spacing * scale;
-    style->MarginL = opts->margin_x * scale;
+
+    printf("3\n");
+    fflush(stdout);
+
+    style->Outline = opts->border_size ;
+    style->Shadow = opts->shadow_offset ;
+    style->Spacing = opts->spacing ;
+    style->MarginL = opts->margin_x ;
     style->MarginR = style->MarginL;
-    style->MarginV = opts->margin_y * scale;
+    style->MarginV = opts->margin_y ;
+    printf("4\n");
+    fflush(stdout);
     style->ScaleX = 1.;
     style->ScaleY = 1.;
     style->Alignment = 1 + (opts->align_x + 1) + (opts->align_y + 2) % 3 * 4;
 #ifdef ASS_JUSTIFY_LEFT
     style->Justify = opts->justify;
 #endif
+    printf("5\n");
+    fflush(stdout);
     style->Blur = opts->blur;
     style->Bold = opts->bold;
     style->Italic = opts->italic;