31 lines
944 B
Diff
31 lines
944 B
Diff
From c0502b3771e4eac89a199a3558182337d146d4ab Mon Sep 17 00:00:00 2001
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From: Michael Vrhel <michael.vrhel@artifex.com>
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Date: Thu, 29 Dec 2016 12:00:40 -0800
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Subject: [PATCH] Bug 697444 Unmatched transparency group pop
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This issue can only occur if there is an unmatched group pop.
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If the interpreter is doing that, then the interpreter is
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broken. With this bug the user is intentionally doing it.
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We now throw and error when it occurs.
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---
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base/gdevp14.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/base/gdevp14.c b/base/gdevp14.c
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index ad3478f..84f0f40 100644
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--- a/base/gdevp14.c
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+++ b/base/gdevp14.c
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@@ -985,6 +985,9 @@ pdf14_pop_transparency_group(gs_gstate *pgs, pdf14_ctx *ctx,
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bool blendspot = pdev->blendspot;
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bool nonicc_conversion = true;
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+ if (nos == NULL)
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+ return_error(gs_error_unknownerror); /* Unmatched group pop */
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+
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#ifdef DEBUG
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pdf14_debug_mask_stack_state(ctx);
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#endif
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--
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2.9.3
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