tests: add 34_expr_error_in_rule

src/tests/34_expr_error_in_rule/EXPECTED_EXIT_CODE

@@ -0,0 +1 @@
+1

src/tests/34_expr_error_in_rule/EXPECTED_STDERR

@@ -0,0 +1 @@
+laze: error: builder "single_builder": binary "single_app": module "single_app": rule "CC": while expanding cmd "echo ${LOCAL_VAR} ${GLOBAL_VAR} ${in} > ${out}": expression error: An operator expected 2 arguments, but got 1.

src/tests/34_expr_error_in_rule/laze-project.yml

@@ -0,0 +1,22 @@
+builders:
+  - name: single_builder
+    rules:
+        - name: CC
+          in: 'c'
+          out: 'o'
+          cmd: 'echo ${LOCAL_VAR} ${GLOBAL_VAR} ${in} > ${out}'
+        - name: LINK
+          in: 'o'
+          cmd: 'cat ${in} > ${out}'
+
+    env:
+      bindir: build/${builder}/${app}
+
+apps:
+  - name: single_app
+    sources:
+      - single_app.c
+
+    env:
+      local:
+        LOCAL_VAR: "result = $(1+)"

src/tests/34_expr_error_in_rule/test.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+. ../test-common.sh
+
+cleanup
+build
+
+echo TEST_OK
+
+cleanup