Error converting between Postgres and Rust types when using !zoom! token

[pnorman]

2017-07-13 05:28:50.514 ERROR Query: SELECT ST_Multi(ST_SimplifyPreserveTopology(ST_Multi(way),$6::FLOAT8/2)) AS way,"name","ref","class","brunnel" FROM (  SELECT
      way,
      name,
      ref,
      highway AS class,
      CASE
        WHEN bridge IS NOT NULL AND bridge <> 'no' THEN 'bridge'
        ELSE CASE WHEN tunnel IS NOT NULL and tunnel <> 'no' THEN 'tunnel' END
      END AS brunnel
    FROM planet_osm_roads
    WHERE way && ST_MakeEnvelope($1,$2,$3,$4,3857)
      AND (highway = 'motorway'
        OR highway = 'trunk' AND $5 >= 7
        OR highway = 'primary' AND $5 >= 8
        OR highway = 'secondary' AND $5 >= 9)
  ) AS _q
2017-07-13 05:28:50.514 ERROR Param types: [Bbox, Zoom, PixelWidth]
2017-07-13 05:28:50.514 ERROR Param values: [-20037508.342789248, -20037508.342789248, 20037508.342789248, 20037508.342789248, 0, 156543.033928041]

The layer in question is

[[tileset.layer]]
name = "transport"
geometry_field = "way"
geometry_type = "LINESTRING"
srid = 3857
buffer-size = 128
simplify = true
  [[tileset.layer.query]]
  minzoom = 0
  maxzoom = 10
  sql = """
  SELECT
      way,
      name,
      ref,
      highway AS class,
      CASE
        WHEN bridge IS NOT NULL AND bridge <> 'no' THEN 'bridge'
        ELSE CASE WHEN tunnel IS NOT NULL and tunnel <> 'no' THEN 'tunnel' END
      END AS brunnel
    FROM planet_osm_roads
    WHERE way && !bbox!
      AND (highway = 'motorway'
        OR highway = 'trunk' AND !zoom! >= 7
        OR highway = 'primary' AND !zoom! >= 8
        OR highway = 'secondary' AND !zoom! >= 9)
  """

If I remove the !zoom! tokens, it works.

[pka]

Fixed in 9caebd7. This was a severe one. Can you build yourself or shall I make a bugfix release?

[pnorman]

I could figure out how to build myself, but it would be worth a bugfix release for everyone else.

[pka]

Packages are building...

[wilhelmberg]

I came across a similar problem with current release 0.7.8.
No time for building latest source myself but I could work around it by using CAST:

case CAST(!zoom! as int)
  when 7 then BR_TYP IN (5001,5002) AND DRAWCLASS IN (11010, 11020, 11030, 11110, 13010)