{incorrect_format,unclosed_tag} for template variables inside a tuple

[ruel]

Description

I'm creating a template for my cowboy projects, and it fails to recognise variable names inside tuples:

{{{name}}_rest_worker, start_link, []},

Workaround is simply putting a whitespace before the template variable tag:

{ {{name}}_rest_worker, start_link, []},

But this doesn't look like a clean one. I'll try to see if I can help fixing this

Stacktrace

===> Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace or consult rebar3.crashdump
===> Uncaught error: {incorrect_format,unclosed_tag}
===> Stack trace to the error location: [{bbmustache,parse2,3,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/bbmustache/src/bbmustache.erl"},
                                                  {line,206}]},
                                                {bbmustache,parse,2,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/bbmustache/src/bbmustache.erl"},
                                                  {line,169}]},
                                                {bbmustache,
                                                 parse_binary_impl,2,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/bbmustache/src/bbmustache.erl"},
                                                  {line,164}]},
                                                {bbmustache,render,3,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/bbmustache/src/bbmustache.erl"},
                                                  {line,92}]},
                                                {rebar_templater,
                                                 execute_template,5,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/rebar/src/rebar_templater.erl"},
                                                  {line,236}]},
                                                {rebar_prv_new,do,1,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/rebar/src/rebar_prv_new.erl"},
                                                  {line,53}]},
                                                {rebar_core,do,2,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/rebar/src/rebar_core.erl"},
                                                  {line,125}]},
                                                {rebar3,main,1,
                                                 [{file,
                                                   "/Users/ruel/projects/rebar3/_build/default/lib/rebar/src/rebar3.erl"},
                                                  {line,56}]}]

Environment

Rebar3 report
 version 3.2.0+build.3507.reffef403b
 generated at 2016-09-09T13:38:36+00:00
=================
Please submit this along with your issue at https://github.com/erlang/rebar3/issues (and feel free to edit out private information, if any)
-----------------
Task:
Entered as:

-----------------
Operating System: x86_64-apple-darwin14.1.0
ERTS: Erlang/OTP 18 [erts-7.3] [source-d2a6d81] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]
Root Directory: /usr/local/lib/erlang
Library directory: /usr/local/lib/erlang/lib
-----------------
Loaded Applications:
bbmustache: 1.0.4
certifi: 0.4.0
cf: 0.2.1
common_test: 1.12
compiler: 6.0.3
crypto: 3.6.3
cth_readable: 1.2.3
dialyzer: 2.9
edoc: 0.7.18
erlware_commons: 0.21.0
eunit: 2.2.13
eunit_formatters: 0.3.1
getopt: 0.8.2
inets: 6.2
kernel: 4.2
providers: 1.6.0
public_key: 1.1.1
relx: 3.20.0
sasl: 2.7
snmp: 5.2.2
ssl_verify_hostname: 1.0.5
stdlib: 2.8
syntax_tools: 1.7
tools: 2.8.3

-----------------
Escript path: /usr/local/bin/rebar3
Providers:
  app_discovery as clean compile compile cover ct deps dialyzer do edoc escriptize eunit help install install_deps list lock new path pkgs release relup report shell state tar tree unlock update upgrade upgrade upgrade version xref

[ferd]

Confirmed, I did hit that recently. One thing to try is to see if updating the mustache library (see #1264) would help, or if newer fixes there would be required.