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-rw-r--r--compiler/commands.nim5
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/commands.nim b/compiler/commands.nim
index 330504a76..866405f9f 100644
--- a/compiler/commands.nim
+++ b/compiler/commands.nim
@@ -606,7 +606,10 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     incl(conf.globalOptions, optRun)
   of "verbosity":
     expectArg(conf, switch, arg, pass, info)
-    conf.verbosity = parseInt(arg)
+    let verbosity = parseInt(arg)
+    if verbosity notin {0..3}:
+      localError(conf, info, "invalid verbosity level: '$1'" % arg)
+    conf.verbosity = verbosity
     conf.notes = NotesVerbosity[conf.verbosity]
     incl(conf.notes, conf.enableNotes)
     excl(conf.notes, conf.disableNotes)