Enable --error-on-warnings in test-suite

Author: m-o-e

test/test.sh

@@ -30,6 +30,8 @@ trap 'err $LINENO' ERR
 
 unset RUCKSACK_MODE
 
+BUILD_FLAGS=--error-on-warnings
+
 crystal run test/test.cr >$to 2>$te
 .
 RUCKSACK_MODE=0 crystal run test/test.cr >$to 2>$te
@@ -41,7 +43,7 @@ RUCKSACK_MODE=0 crystal run test/test.cr >$to 2>$te
 
 ### crystal build w/o rucksack attached
 
-crystal build test/test.cr -o ${tb}
+crystal build $BUILD_FLAGS test/test.cr -o ${tb}
 .
 RUCKSACK_MODE=0 $tb >$to 2>$te
 .
@@ -63,7 +65,7 @@ RUCKSACK_MODE=2 $tb >$to 2>$te
 ### crystal build with phony padding
 
 #### case A: extra nulls before Knautschzone
-crystal build test/test.cr -o ${tb}
+crystal build $BUILD_FLAGS test/test.cr -o ${tb}
 head -c 17042 /dev/zero >>${tb}
 cat .rucksack >>$tb
 RUCKSACK_MODE=0 $tb >$to 2>$te
@@ -75,7 +77,7 @@ RUCKSACK_MODE=2 $tb >$to 2>$te
 
 #### case B: duplicate padding
 
-crystal build test/test.cr -o ${tb}
+crystal build $BUILD_FLAGS test/test.cr -o ${tb}
 head -c 16397 /dev/zero >>${tb}
 cat .rucksack >>$tb
 RUCKSACK_MODE=0 $tb >$to 2>$te
@@ -87,7 +89,7 @@ RUCKSACK_MODE=2 $tb >$to 2>$te
 
 #### case C: extra nulls and truncated header
 
-crystal build test/test.cr -o ${tb}
+crystal build $BUILD_FLAGS test/test.cr -o ${tb}
 head -c 16397 /dev/zero >>${tb}
 echo = >>${tb}
 cat .rucksack >>$tb
@@ -100,7 +102,7 @@ RUCKSACK_MODE=2 $tb >$to 2>$te
 
 #### case D: extra nulls and longer truncated header
 
-crystal build test/test.cr -o ${tb}
+crystal build $BUILD_FLAGS test/test.cr -o ${tb}
 head -c 16397 /dev/zero >>${tb}
 echo ==RUCK >>${tb}
 cat .rucksack >>$tb