diff --git a/traces/mix-callset-file.script b/traces/mix-callset-file.script
new file mode 100644
index 0000000..9b50c8e
--- /dev/null
+++ b/traces/mix-callset-file.script
@@ -0,0 +1,6 @@
+dump --verbose --calls=@multi-callset_1a.calls,3-5/2,@multi-callset_2.calls tri.trace
+1 glXChooseFBConfig(dpy = 0xfc52b0, screen = 0, attribList = {GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1, GLX_ALPHA_SIZE, 1, GLX_DOUBLEBUFFER, 1, 0}, nitems = &12) = {0xfe3620, 0xfe3710, 0xfe53e0, 0xfe54d0, 0xfe38f0, 0xfe39e0, 0xfe3e90, 0xfe56b0, 0xfe57a0, 0xfe5c50, 0xfe3f80, 0xfe5d40}
+3 glXCreateNewContext(dpy = 0xfc52b0, config = 0xfe3620, renderType = GLX_RGBA_TYPE, shareList = NULL, direct = True) = 0xfdd650
+5 glXMakeContextCurrent(dpy = 0xfc52b0, draw = 44040194, read = 44040194, ctx = 0xfdd650) = True
+30 glXSwapBuffers(dpy = 0xfc52b0, drawable = 44040194)
+
diff --git a/traces/mix-trim-frame-set.script b/traces/mix-trim-frame-set.script
new file mode 100644
index 0000000..2adade9
--- /dev/null
+++ b/traces/mix-trim-frame-set.script
@@ -0,0 +1,20 @@
+trim --exact --frames=0-5/draw,0-5/frame glxsimple.trace
+dump --verbose glxsimple-trim.trace
+0 glClear(mask = GL_COLOR_BUFFER_BIT)
+1 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
+2 glEnd()
+3 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
+4 glEnd()
+5 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
+6 glClear(mask = GL_COLOR_BUFFER_BIT)
+7 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
+8 glEnd()
+9 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
+10 glEnd()
+11 glXSwapBuffers(dpy = 0x236a280, drawable = 41943041)
+
diff --git a/traces/multi-callset_1a.calls b/traces/multi-callset_1a.calls
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/traces/multi-callset_1a.calls
@@ -0,0 +1 @@
+1