48b3f1f261
See the following link for further details: https://github.com/eerimoq/asn1tools/issues/167 Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
21 lines
844 B
Diff
21 lines
844 B
Diff
From: InSync <122007197+InSyncWithFoo@users.noreply.github.com>
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Date: Sat, 13 Jan 2024 05:04:57 +0000
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Subject: [PATCH] Avoid assigning an empty error message to delegated parse
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exception
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diff --git a/pyparsing/core.py b/pyparsing/core.py
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index 73514ed..fc19d1c 100644
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--- a/pyparsing/core.py
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+++ b/pyparsing/core.py
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@@ -4569,7 +4569,8 @@ class ParseElementEnhance(ParserElement):
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return self.expr._parse(instring, loc, doActions, callPreParse=False)
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except ParseBaseException as pbe:
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if not isinstance(self, Forward) or self.customName is not None:
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- pbe.msg = self.errmsg
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+ if self.errmsg:
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+ pbe.msg = self.errmsg
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raise
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else:
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raise ParseException(instring, loc, "No expression defined", self)
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