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-rw-r--r--src/crypto/emscInterface.ts3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/crypto/emscInterface.ts b/src/crypto/emscInterface.ts
index 2ddc15a37..70a85cda1 100644
--- a/src/crypto/emscInterface.ts
+++ b/src/crypto/emscInterface.ts
@@ -43,6 +43,9 @@ export function initialize(lib: EmscLib) {
if (!lib) {
throw Error("library must be object");
}
+ if (!lib.ccall) {
+ throw Error("sanity check failed: EmscLib does not have 'ccall'");
+ }
if (maybeEmscEnv) {
throw Error("emsc lib already initialized");
}