From 6b26b710b84110b4f96e27da59dc9c8329948e86 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 27 Apr 2014 10:23:20 +0300
Subject: [PATCH] Added simple check for unsupported compression method in .7z
 files

---
 src/resourcefiles/file_7z.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/resourcefiles/file_7z.cpp b/src/resourcefiles/file_7z.cpp
index 5c92892426..a006267740 100644
--- a/src/resourcefiles/file_7z.cpp
+++ b/src/resourcefiles/file_7z.cpp
@@ -293,6 +293,21 @@ bool F7ZFile::Open(bool quiet)
 	}
 	// Resize the lump record array to its actual size
 	NumLumps -= skipped;
+
+	if (NumLumps > 0)
+	{
+		// Quick check for unsupported compression method
+
+		TArray<char> temp;
+		temp.Resize(Lumps[0].LumpSize);
+
+		if (SZ_OK != Archive->Extract(Lumps[0].Position, &temp[0]))
+		{
+			if (!quiet) Printf("\n%s: unsupported 7z/LZMA file!\n", Filename);
+			return false;
+		}
+	}
+
 	if (!quiet) Printf(", %d lumps\n", NumLumps);
 
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